Merge pull request #9293 from peppy/update-framework

Update framework

CONTRIBUTING.md

@@ -0,0 +1,137 @@
+# Contributing Guidelines
+
+Thank you for showing interest in the development of osu!lazer! We aim to provide a good collaborating environment for everyone involved, and as such have decided to list some of the most important things to keep in mind in the process. The guidelines below have been chosen based on past experience.
+
+These are not "official rules" *per se*, but following them will help everyone deal with things in the most efficient manner.
+
+## Table of contents
+
+1. [I would like to submit an issue!](#i-would-like-to-submit-an-issue)
+2. [I would like to submit a pull request!](#i-would-like-to-submit-a-pull-request)
+
+## I would like to submit an issue!
+
+Issues, bug reports and feature suggestions are welcomed, though please keep in mind that at any point in time, hundreds of issues are open, which vary in severity and the amount of time needed to address them. As such it's not uncommon for issues to remain unresolved for a long time or even closed outright if they are deemed not important enough to fix in the foreseeable future. Issues that are required to "go live" or otherwise achieve parity with stable are prioritised the most.
+
+* **Before submitting an issue, try searching existing issues first.**
+
+  For housekeeping purposes, we close issues that overlap with or duplicate other pre-existing issues - you can help us not to have to do that by searching existing issues yourself first. The issue search box, as well as the issue tag system, are tools you can use to check if an issue has been reported before.
+
+* **When submitting a bug report, please try to include as much detail as possible.**
+
+  Bugs are not equal - some of them will be reproducible every time on pretty much all hardware, while others will be hard to track down due to being specific to particular hardware or even somewhat random in nature. As such, providing as much detail as possible when reporting a bug is hugely appreciated. A good starting set of information consists of:
+
+  * the in-game logs, which are located at:
+    * `%AppData%/osu/logs` (on Windows),
+    * `~/.local/share/osu/logs` (on Linux and macOS),
+    * `Android/Data/sh.ppy.osulazer/logs` (on Android),
+    * on iOS they can be obtained by connecting your device to your desktop and [copying the `logs` directory from the app's own document storage using iTunes](https://support.apple.com/en-us/HT201301#copy-to-computer),
+  * your system specifications (including the operating system and platform you are playing on),
+  * a reproduction scenario (list of steps you have performed leading up to the occurrence of the bug),
+  * a video or picture of the bug, if at all possible.
+
+* **Provide more information when asked to do so.**
+
+  Sometimes when a bug is more elusive or complicated, none of the information listed above will pinpoint a concrete cause of the problem. In this case we will most likely ask you for additional info, such as a Windows Event Log dump or a copy of your local lazer database (`client.db`). Providing that information is beneficial to both parties - we can track down the problem better, and hopefully fix it for you at some point once we know where it is!
+
+* **When submitting a feature proposal, please describe it in the most understandable way you can.**
+
+  Communicating your idea for a feature can often be hard, and we would like to avoid any misunderstandings. As such, please try to explain your idea in a short, but understandable manner - it's best to avoid jargon or terms and references that could be considered obscure. A mock-up picture (doesn't have to be good!) of the feature can also go a long way in explaining.
+
+* **Refrain from posting "+1" comments.**
+
+  If an issue has already been created, saying that you also experience it without providing any additional details doesn't really help us in any way. To express support for a proposal or indicate that you are also affected by a particular bug, you can use comment reactions instead.
+
+* **Refrain from asking if an issue has been resolved yet.**
+
+  As mentioned above, the issue tracker has hundreds of issues open at any given time. Currently the game is being worked on by two members of the core team, and a handful of outside contributors who offer their free time to help out. As such, it can happen that an issue gets placed on the backburner due to being less important; generally posting a comment demanding its resolution some months or years after it is reported is not very likely to increase its priority.
+
+* **Avoid long discussions about non-development topics.**
+
+  GitHub is mostly a developer space, and as such isn't really fit for lengthened discussions about gameplay mechanics (which might not even be in any way confirmed for the final release) and similar non-technical matters. Such matters are probably best addressed at the osu! forums.
+
+## I would like to submit a pull request!
+
+We also welcome pull requests from unaffiliated contributors. The [issue tracker](https://github.com/ppy/osu/issues) should provide plenty of issues that you can work on; we also mark issues that we think would be good for newcomers with the [`good-first-issue`](https://github.com/ppy/osu/issues?q=is%3Aissue+is%3Aopen+label%3Agood-first-issue) label.
+
+However, do keep in mind that the core team is committed to bringing osu!lazer up to par with stable first and foremost, so depending on what your contribution concerns, it might not be merged and released right away. Our approach to managing issues and their priorities is described [in the wiki](https://github.com/ppy/osu/wiki/Project-management).
+
+Here are some key things to note before jumping in:
+
+* **Make sure you are comfortable with C\# and your development environment.**
+
+  While we are accepting of all kinds of contributions, we also have a certain quality standard we'd like to uphold and limited time to review your code. Therefore, we would like to avoid providing entry-level advice, and as such if you're not very familiar with C\# as a programming language, we'd recommend that you start off with a few personal projects to get acquainted with the language's syntax, toolchain and principles of object-oriented programming first.
+
+  In addition, please take the time to take a look at and get acquainted with the [development and testing](https://github.com/ppy/osu-framework/wiki/Development-and-Testing) procedure we have set up.
+
+* **Make sure you are familiar with git and the pull request workflow.**
+
+  [git](https://git-scm.com/) is a distributed version control system that might not be very intuitive at the beginning if you're not familiar with version control. In particular, projects using git have a particular workflow for submitting code changes, which is called the pull request workflow.
+
+  To make things run more smoothly, we recommend that you look up some online resources to familiarise yourself with the git vocabulary and commands, and practice working with forks and submitting pull requests at your own pace. A high-level overview of the process can be found in [this article by GitHub](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/proposing-changes-to-your-work-with-pull-requests).
+
+* **Double-check designs before starting work on new functionality.**
+
+  When implementing new features, keep in mind that we already have a lot of the UI designed. If you wish to work on something with the intention of having it included in the official distribution, please open an issue for discussion and we will give you what you need from a design perspective to proceed. If you want to make *changes* to the design, we recommend you open an issue with your intentions before spending too much time to ensure no effort is wasted.
+
+* **Make sure to submit pull requests off of a topic branch.**
+
+  As described in the article linked in the previous point, topic branches help you parallelise your work and separate it from the main `master` branch, and additionally are easier for maintainers to work with. Working with multiple `master` branches across many remotes is difficult to keep track of, and it's easy to make a mistake and push to the wrong `master` branch by accident.
+
+* **Refrain from making changes through the GitHub web interface.**
+
+  Even though GitHub provides an option to edit code or replace files in the repository using the web interface, we strongly discourage using it in most scenarios. Editing files this way is inefficient and likely to introduce whitespace or file encoding changes that make it more difficult to review the code.
+
+  Code written through the web interface will also very likely be questioned outright by the reviewers, as it is likely that it has not been properly tested or that it will fail continuous integration checks. We strongly encourage using an IDE like [Visual Studio](https://visualstudio.microsoft.com/), [Visual Studio Code](https://code.visualstudio.com/) or [JetBrains Rider](https://www.jetbrains.com/rider/) instead.
+
+* **Add tests for your code whenever possible.**
+
+  Automated tests are an essential part of a quality and reliable codebase. They help to make the code more maintainable by ensuring it is safe to reorganise (or refactor) the code in various ways, and also prevent regressions - bugs that resurface after having been fixed at some point in the past. If it is viable, please put in the time to add tests, so that the changes you make can last for a (hopefully) very long time.
+
+* **Run tests before opening a pull request.**
+
+  Tying into the previous point, sometimes changes in one part of the codebase can result in unpredictable changes in behaviour in other pieces of the code. This is why it is best to always try to run tests before opening a PR.
+
+  Continuous integration will always run the tests for you (and us), too, but it is best not to rely on it, as there might be many builds queued at any time. Running tests on your own will help you be more certain that at the point of clicking the "Create pull request" button, your changes are as ready as can be.
+
+* **Run code style analysis before opening a pull request.**
+
+  As part of continuous integration, we also run code style analysis, which is supposed to make sure that your code is formatted the same way as all the pre-existing code in the repository. The reason we enforce a particular code style everywhere is to make sure the codebase is consistent in that regard - having one whitespace convention in one place and another one elsewhere causes disorganisation.
+
+* **Make sure that the pull request is complete before opening it.**
+
+  Whether it's fixing a bug or implementing new functionality, it's best that you make sure that the change you want to submit as a pull request is as complete as it can be before clicking the *Create pull request* button. Having to track if a pull request is ready for review or not places additional burden on reviewers.
+
+  Draft pull requests are an option, but use them sparingly and within reason. They are best suited to discuss code changes that cannot be easily described in natural language or have a potential large impact on the future direction of the project. When in doubt, don't open drafts unless a maintainer asks you to do so.
+
+* **Only push code when it's ready.**
+
+  As an extension of the above, when making changes to an already-open PR, please try to only push changes you are reasonably certain of. Pushing after every commit causes the continuous integration build queue to grow in size, slowing down work and taking up time that could be spent verifying other changes.
+
+* **Make sure to keep the *Allow edits from maintainers* check box checked.**
+
+  To speed up the merging process, collaborators and team members will sometimes want to push changes to your branch themselves, to make minor code style adjustments or to otherwise refactor the code without having to describe how they'd like the code to look like in painstaking detail. Having the *Allow edits from maintainers* check box checked lets them do that; without it they are forced to report issues back to you and wait for you to address them.
+
+* **Refrain from continually merging the master branch back to the PR.**
+
+  Unless there are merge conflicts that need resolution, there is no need to keep merging `master` back to a branch over and over again. One of the maintainers will merge `master` themselves before merging the PR itself anyway, and continual merge commits can cause CI to get overwhelmed due to queueing up too many builds.
+
+* **Refrain from force-pushing to the PR branch.**
+
+  Force-pushing should be avoided, as it can lead to accidentally overwriting a maintainer's changes or CI building wrong commits. We value all history in the project, so there is no need to squash or amend commits in most cases.
+
+  The cases in which force-pushing is warranted are very rare (such as accidentally leaking sensitive info in one of the files committed, adding unrelated files, or mis-merging a dependent PR).
+
+* **Be patient when waiting for the code to be reviewed and merged.**
+
+  As much as we'd like to review all contributions as fast as possible, our time is limited, as team members have to work on their own tasks in addition to reviewing code. As such, work needs to be prioritised, and it can unfortunately take weeks or months for your PR to be merged, depending on how important it is deemed to be.
+
+* **Don't mistake criticism of code for criticism of your person.**
+
+  As mentioned before, we are highly committed to quality when it comes to the lazer project. This means that contributions from less experienced community members can take multiple rounds of review to get to a mergeable state. We try our utmost best to never conflate a person with the code they authored, and to keep the discussion focused on the code at all times. Please consider our comments and requests a learning experience, and don't treat it as a personal attack.
+
+* **Feel free to reach out for help.**
+
+  If you're uncertain about some part of the codebase or some inner workings of the game and framework, please reach out either by leaving a comment in the relevant issue or PR thread, or by posting a message in the [development Discord server](https://discord.gg/ppy). We will try to help you as much as we can.
+
+  When it comes to which form of communication is best, GitHub generally lends better to longer-form discussions, while Discord is better for snappy call-and-response answers. Use your best discretion when deciding, and try to keep a single discussion in one place instead of moving back and forth.

Gemfile.lock

@@ -5,6 +5,22 @@ GEM
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     atomos (0.1.3)
+    aws-eventstream (1.1.0)
+    aws-partitions (1.329.0)
+    aws-sdk-core (3.99.2)
+      aws-eventstream (~> 1, >= 1.0.2)
+      aws-partitions (~> 1, >= 1.239.0)
+      aws-sigv4 (~> 1.1)
+      jmespath (~> 1.0)
+    aws-sdk-kms (1.34.1)
+      aws-sdk-core (~> 3, >= 3.99.0)
+      aws-sigv4 (~> 1.1)
+    aws-sdk-s3 (1.68.1)
+      aws-sdk-core (~> 3, >= 3.99.0)
+      aws-sdk-kms (~> 1)
+      aws-sigv4 (~> 1.1)
+    aws-sigv4 (1.1.4)
+      aws-eventstream (~> 1.0, >= 1.0.2)
     babosa (1.0.3)
     claide (1.0.3)
     colored (1.2)
@@ -13,23 +29,24 @@ GEM
       highline (~> 1.7.2)
     declarative (0.0.10)
     declarative-option (0.1.0)
-    digest-crc (0.4.1)
+    digest-crc (0.5.1)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.7.5)
     emoji_regex (1.0.1)
-    excon (0.71.1)
-    faraday (0.17.3)
+    excon (0.74.0)
+    faraday (1.0.1)
       multipart-post (>= 1.2, < 3)
     faraday-cookie_jar (0.0.6)
       faraday (>= 0.7.4)
       http-cookie (~> 1.0.0)
-    faraday_middleware (0.13.1)
-      faraday (>= 0.7.4, < 1.0)
+    faraday_middleware (1.0.0)
+      faraday (~> 1.0)
     fastimage (2.1.7)
-    fastlane (2.140.0)
+    fastlane (2.149.1)
       CFPropertyList (>= 2.3, < 4.0.0)
       addressable (>= 2.3, < 3.0.0)
+      aws-sdk-s3 (~> 1.0)
       babosa (>= 1.0.2, < 2.0.0)
       bundler (>= 1.12.0, < 3.0.0)
       colored
@@ -37,12 +54,12 @@ GEM
       dotenv (>= 2.1.1, < 3.0.0)
       emoji_regex (>= 0.1, < 2.0)
       excon (>= 0.71.0, < 1.0.0)
-      faraday (~> 0.17)
+      faraday (>= 0.17, < 2.0)
       faraday-cookie_jar (~> 0.0.6)
-      faraday_middleware (~> 0.13.1)
+      faraday_middleware (>= 0.13.1, < 2.0)
       fastimage (>= 2.1.0, < 3.0.0)
       gh_inspector (>= 1.1.2, < 2.0.0)
-      google-api-client (>= 0.29.2, < 0.37.0)
+      google-api-client (>= 0.37.0, < 0.39.0)
       google-cloud-storage (>= 1.15.0, < 2.0.0)
       highline (>= 1.7.2, < 2.0.0)
       json (< 3.0.0)
@@ -69,7 +86,7 @@ GEM
       souyuz (= 0.9.1)
     fastlane-plugin-xamarin (0.6.3)
     gh_inspector (1.1.3)
-    google-api-client (0.36.4)
+    google-api-client (0.38.0)
       addressable (~> 2.5, >= 2.5.1)
       googleauth (~> 0.9)
       httpclient (>= 2.8.1, < 3.0)
@@ -80,27 +97,28 @@ GEM
     google-cloud-core (1.5.0)
       google-cloud-env (~> 1.0)
       google-cloud-errors (~> 1.0)
-    google-cloud-env (1.3.0)
-      faraday (~> 0.11)
-    google-cloud-errors (1.0.0)
-    google-cloud-storage (1.25.1)
+    google-cloud-env (1.3.2)
+      faraday (>= 0.17.3, < 2.0)
+    google-cloud-errors (1.0.1)
+    google-cloud-storage (1.26.2)
       addressable (~> 2.5)
       digest-crc (~> 0.4)
       google-api-client (~> 0.33)
       google-cloud-core (~> 1.2)
       googleauth (~> 0.9)
       mini_mime (~> 1.0)
-    googleauth (0.10.0)
-      faraday (~> 0.12)
+    googleauth (0.12.0)
+      faraday (>= 0.17.3, < 2.0)
       jwt (>= 1.4, < 3.0)
       memoist (~> 0.16)
       multi_json (~> 1.11)
       os (>= 0.9, < 2.0)
-      signet (~> 0.12)
+      signet (~> 0.14)
     highline (1.7.10)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
     httpclient (2.8.3)
+    jmespath (1.4.0)
     json (2.3.0)
     jwt (2.1.0)
     memoist (0.16.2)
@@ -114,7 +132,7 @@ GEM
     naturally (2.2.0)
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
-    os (1.0.1)
+    os (1.1.0)
     plist (3.5.0)
     public_suffix (2.0.5)
     representable (3.0.4)
@@ -125,12 +143,12 @@ GEM
     rouge (2.0.7)
     rubyzip (1.3.0)
     security (0.1.3)
-    signet (0.12.0)
+    signet (0.14.0)
       addressable (~> 2.3)
-      faraday (~> 0.9)
+      faraday (>= 0.17.3, < 2.0)
       jwt (>= 1.5, < 3.0)
       multi_json (~> 1.10)
-    simctl (1.6.7)
+    simctl (1.6.8)
       CFPropertyList
       naturally
     slack-notifier (2.3.2)
@@ -141,17 +159,17 @@ GEM
     terminal-notifier (2.0.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    tty-cursor (0.7.0)
-    tty-screen (0.7.0)
-    tty-spinner (0.9.2)
+    tty-cursor (0.7.1)
+    tty-screen (0.8.0)
+    tty-spinner (0.9.3)
       tty-cursor (~> 0.7)
     uber (0.1.0)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.6)
-    unicode-display_width (1.6.1)
+    unf_ext (0.0.7.7)
+    unicode-display_width (1.7.0)
     word_wrap (1.0.0)
-    xcodeproj (1.14.0)
+    xcodeproj (1.16.0)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
       claide (>= 1.0.2, < 2.0)

README.md

@@ -93,11 +93,7 @@ JetBrains ReSharper InspectCode is also used for wider rule sets. You can run it
 
 ## Contributing
 
-We welcome all contributions, but keep in mind that we already have a lot of the UI designed. If you wish to work on something with the intention of having it included in the official distribution, please open an issue for discussion and we will give you what you need from a design perspective to proceed. If you want to make *changes* to the design, we recommend you open an issue with your intentions before spending too much time to ensure no effort is wasted.
-
-If you're unsure of what you can help with, check out the [list of open issues](https://github.com/ppy/osu/issues) (especially those with the ["good first issue"](https://github.com/ppy/osu/issues?q=is%3Aopen+label%3Agood-first-issue+sort%3Aupdated-desc) label).
-
-Before starting, please make sure you are familiar with the [development and testing](https://github.com/ppy/osu-framework/wiki/Development-and-Testing) procedure we have set up. New component development, and where possible, bug fixing and debugging existing components **should always be done under VisualTests**.
+When it comes to contributing to the project, the two main things you can do to help out are reporting issues and submitting pull requests. Based on past experiences, we have prepared a [list of contributing guidelines](CONTRIBUTING.md) that should hopefully ease you into our collaboration process and answer the most frequently-asked questions.
 
 Note that while we already have certain standards in place, nothing is set in stone. If you have an issue with the way code is structured, with any libraries we are using, or with any processes involved with contributing, *please* bring it up. We welcome all feedback so we can make contributing to this project as painless as possible.
 

build/InspectCode.cake

@@ -1,5 +1,5 @@
-#addin "nuget:?package=CodeFileSanity&version=0.0.33"
-#addin "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2019.3.2"
+#addin "nuget:?package=CodeFileSanity&version=0.0.36"
+#addin "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2020.1.3"
 #tool "nuget:?package=NVika.MSBuild&version=1.0.1"
 var nVikaToolPath = GetFiles("./tools/NVika.MSBuild.*/tools/NVika.exe").First();
 

global.json

@@ -5,6 +5,6 @@
     "version": "3.1.100"
   },
   "msbuild-sdks": {
-    "Microsoft.Build.Traversal": "2.0.34"
+    "Microsoft.Build.Traversal": "2.0.50"
   }
 }

osu.Android.props

@@ -52,6 +52,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="ppy.osu.Game.Resources" Version="2020.602.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2020.601.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2020.616.0" />
   </ItemGroup>
 </Project>

osu.Desktop/OsuGameDesktop.cs

@@ -10,7 +10,6 @@ using Microsoft.Win32;
 using osu.Desktop.Overlays;
 using osu.Framework.Platform;
 using osu.Game;
-using osuTK.Input;
 using osu.Desktop.Updater;
 using osu.Framework;
 using osu.Framework.Logging;
@@ -59,7 +58,7 @@ namespace osu.Desktop
             try
             {
                 using (RegistryKey key = Registry.ClassesRoot.OpenSubKey("osu"))
-                    stableInstallPath = key?.OpenSubKey(@"shell\open\command")?.GetValue(string.Empty).ToString().Split('"')[1].Replace("osu!.exe", "");
+                    stableInstallPath = key?.OpenSubKey(@"shell\open\command")?.GetValue(string.Empty).ToString()?.Split('"')[1].Replace("osu!.exe", "");
 
                 if (checkExists(stableInstallPath))
                     return stableInstallPath;
@@ -122,21 +121,27 @@ namespace osu.Desktop
         {
             base.SetHost(host);
 
-            if (host.Window is DesktopGameWindow desktopWindow)
+            switch (host.Window)
             {
-                desktopWindow.CursorState |= CursorState.Hidden;
+                // Legacy osuTK DesktopGameWindow
+                case DesktopGameWindow desktopGameWindow:
+                    desktopGameWindow.CursorState |= CursorState.Hidden;
+                    desktopGameWindow.SetIconFromStream(Assembly.GetExecutingAssembly().GetManifestResourceStream(GetType(), "lazer.ico"));
+                    desktopGameWindow.Title = Name;
+                    desktopGameWindow.FileDrop += (_, e) => fileDrop(e.FileNames);
+                    break;
 
-                desktopWindow.SetIconFromStream(Assembly.GetExecutingAssembly().GetManifestResourceStream(GetType(), "lazer.ico"));
-                desktopWindow.Title = Name;
-
-                desktopWindow.FileDrop += fileDrop;
+                // SDL2 DesktopWindow
+                case DesktopWindow desktopWindow:
+                    desktopWindow.CursorState.Value |= CursorState.Hidden;
+                    desktopWindow.Title = Name;
+                    desktopWindow.DragDrop += f => fileDrop(new[] { f });
+                    break;
             }
         }
 
-        private void fileDrop(object sender, FileDropEventArgs e)
+        private void fileDrop(string[] filePaths)
         {
-            var filePaths = e.FileNames;
-
             var firstExtension = Path.GetExtension(filePaths.First());
 
             if (filePaths.Any(f => Path.GetExtension(f) != firstExtension)) return;

osu.Desktop/Updater/SquirrelUpdateManager.cs

@@ -30,25 +30,23 @@ namespace osu.Desktop.Updater
         private static readonly Logger logger = Logger.GetLogger("updater");
 
         [BackgroundDependencyLoader]
-        private void load(NotificationOverlay notification, OsuGameBase game)
+        private void load(NotificationOverlay notification)
         {
             notificationOverlay = notification;
 
-            if (game.IsDeployedBuild)
-            {
-                Splat.Locator.CurrentMutable.Register(() => new SquirrelLogger(), typeof(Splat.ILogger));
-                Schedule(() => Task.Run(() => checkForUpdateAsync()));
-            }
+            Splat.Locator.CurrentMutable.Register(() => new SquirrelLogger(), typeof(Splat.ILogger));
         }
 
-        private async void checkForUpdateAsync(bool useDeltaPatching = true, UpdateProgressNotification notification = null)
+        protected override async Task PerformUpdateCheck() => await checkForUpdateAsync();
+
+        private async Task checkForUpdateAsync(bool useDeltaPatching = true, UpdateProgressNotification notification = null)
         {
             // should we schedule a retry on completion of this check?
             bool scheduleRecheck = true;
 
             try
             {
-                if (updateManager == null) updateManager = await UpdateManager.GitHubUpdateManager(@"https://github.com/ppy/osu", @"osulazer", null, null, true);
+                updateManager ??= await UpdateManager.GitHubUpdateManager(@"https://github.com/ppy/osu", @"osulazer", null, null, true);
 
                 var info = await updateManager.CheckForUpdate(!useDeltaPatching);
                 if (info.ReleasesToApply.Count == 0)
@@ -83,7 +81,7 @@ namespace osu.Desktop.Updater
 
                         // could fail if deltas are unavailable for full update path (https://github.com/Squirrel/Squirrel.Windows/issues/959)
                         // try again without deltas.
-                        checkForUpdateAsync(false, notification);
+                        await checkForUpdateAsync(false, notification);
                         scheduleRecheck = false;
                     }
                     else
@@ -102,7 +100,7 @@ namespace osu.Desktop.Updater
                 if (scheduleRecheck)
                 {
                     // check again in 30 minutes.
-                    Scheduler.AddDelayed(() => checkForUpdateAsync(), 60000 * 30);
+                    Scheduler.AddDelayed(async () => await checkForUpdateAsync(), 60000 * 30);
                 }
             }
         }

osu.Desktop/osu.Desktop.csproj

@@ -30,6 +30,10 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.2.6" />
     <PackageReference Include="Microsoft.Win32.Registry" Version="4.7.0" />
     <PackageReference Include="DiscordRichPresence" Version="1.0.150" />
+    <!-- .NET 3.1 SDK seems to cause issues with a runtime specification. This will likely be resolved in .NET 5. -->
+    <PackageReference Include="System.IO.FileSystem.Primitives" Version="4.3.0" />
+    <PackageReference Include="System.Runtime.Handles" Version="4.3.0" />
+    <PackageReference Include="System.Runtime.InteropServices" Version="4.3.0" />
   </ItemGroup>
   <ItemGroup Label="Resources">
     <EmbeddedResource Include="lazer.ico" />

osu.Game.Rulesets.Catch.Tests/Mods/TestSceneCatchModPerfect.cs

@@ -13,8 +13,10 @@ namespace osu.Game.Rulesets.Catch.Tests.Mods
 {
     public class TestSceneCatchModPerfect : ModPerfectTestScene
     {
+        protected override Ruleset CreatePlayerRuleset() => new CatchRuleset();
+
         public TestSceneCatchModPerfect()
-            : base(new CatchRuleset(), new CatchModPerfect())
+            : base(new CatchModPerfect())
         {
         }
 

osu.Game.Rulesets.Catch.Tests/TestSceneAutoJuiceStream.cs

@@ -12,13 +12,8 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {
-    public class TestSceneAutoJuiceStream : PlayerTestScene
+    public class TestSceneAutoJuiceStream : TestSceneCatchPlayer
     {
-        public TestSceneAutoJuiceStream()
-            : base(new CatchRuleset())
-        {
-        }
-
         protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap

osu.Game.Rulesets.Catch.Tests/TestSceneBananaShower.cs

@@ -4,18 +4,12 @@
 using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
-using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {
     [TestFixture]
-    public class TestSceneBananaShower : PlayerTestScene
+    public class TestSceneBananaShower : TestSceneCatchPlayer
     {
-        public TestSceneBananaShower()
-            : base(new CatchRuleset())
-        {
-        }
-
         [Test]
         public void TestBananaShower()
         {

osu.Game.Rulesets.Catch.Tests/TestSceneCatchPlayer.cs

@@ -9,9 +9,6 @@ namespace osu.Game.Rulesets.Catch.Tests
     [TestFixture]
     public class TestSceneCatchPlayer : PlayerTestScene
     {
-        public TestSceneCatchPlayer()
-            : base(new CatchRuleset())
-        {
-        }
+        protected override Ruleset CreatePlayerRuleset() => new CatchRuleset();
     }
 }

osu.Game.Rulesets.Catch.Tests/TestSceneCatchStacker.cs

@@ -4,18 +4,12 @@
 using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
-using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {
     [TestFixture]
-    public class TestSceneCatchStacker : PlayerTestScene
+    public class TestSceneCatchStacker : TestSceneCatchPlayer
     {
-        public TestSceneCatchStacker()
-            : base(new CatchRuleset())
-        {
-        }
-
         protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap

osu.Game.Rulesets.Catch.Tests/TestSceneHyperDash.cs

@@ -9,19 +9,13 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Rulesets.Objects;
-using osu.Game.Tests.Visual;
 using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {
     [TestFixture]
-    public class TestSceneHyperDash : PlayerTestScene
+    public class TestSceneHyperDash : TestSceneCatchPlayer
     {
-        public TestSceneHyperDash()
-            : base(new CatchRuleset())
-        {
-        }
-
         protected override bool Autoplay => true;
 
         [Test]

osu.Game.Rulesets.Catch.Tests/TestSceneJuiceStream.cs

@@ -7,18 +7,12 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
-using osu.Game.Tests.Visual;
 using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {
-    public class TestSceneJuiceStream : PlayerTestScene
+    public class TestSceneJuiceStream : TestSceneCatchPlayer
     {
-        public TestSceneJuiceStream()
-            : base(new CatchRuleset())
-        {
-        }
-
         [Test]
         public void TestJuiceStreamEndingCombo()
         {

osu.Game.Rulesets.Catch/Difficulty/Skills/Movement.cs

@@ -35,8 +35,7 @@ namespace osu.Game.Rulesets.Catch.Difficulty.Skills
         {
             var catchCurrent = (CatchDifficultyHitObject)current;
 
-            if (lastPlayerPosition == null)
-                lastPlayerPosition = catchCurrent.LastNormalizedPosition;
+            lastPlayerPosition ??= catchCurrent.LastNormalizedPosition;
 
             float playerPosition = Math.Clamp(
                 lastPlayerPosition.Value,

osu.Game.Rulesets.Mania.Tests/ManiaBeatmapSampleConversionTest.cs

@@ -0,0 +1,76 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Utils;
+using osu.Game.Audio;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Tests.Beatmaps;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    [TestFixture]
+    public class ManiaBeatmapSampleConversionTest : BeatmapConversionTest<ConvertMapping<SampleConvertValue>, SampleConvertValue>
+    {
+        protected override string ResourceAssembly => "osu.Game.Rulesets.Mania";
+
+        [TestCase("convert-samples")]
+        [TestCase("mania-samples")]
+        public void Test(string name) => base.Test(name);
+
+        protected override IEnumerable<SampleConvertValue> CreateConvertValue(HitObject hitObject)
+        {
+            yield return new SampleConvertValue
+            {
+                StartTime = hitObject.StartTime,
+                EndTime = hitObject.GetEndTime(),
+                Column = ((ManiaHitObject)hitObject).Column,
+                NodeSamples = getSampleNames((hitObject as HoldNote)?.NodeSamples)
+            };
+        }
+
+        private IList<IList<string>> getSampleNames(List<IList<HitSampleInfo>> hitSampleInfo)
+            => hitSampleInfo?.Select(samples =>
+                                (IList<string>)samples.Select(sample => sample.LookupNames.First()).ToList())
+                            .ToList();
+
+        protected override Ruleset CreateRuleset() => new ManiaRuleset();
+    }
+
+    public struct SampleConvertValue : IEquatable<SampleConvertValue>
+    {
+        /// <summary>
+        /// A sane value to account for osu!stable using ints everywhere.
+        /// </summary>
+        private const float conversion_lenience = 2;
+
+        public double StartTime;
+        public double EndTime;
+        public int Column;
+        public IList<IList<string>> NodeSamples;
+
+        public bool Equals(SampleConvertValue other)
+            => Precision.AlmostEquals(StartTime, other.StartTime, conversion_lenience)
+               && Precision.AlmostEquals(EndTime, other.EndTime, conversion_lenience)
+               && samplesEqual(NodeSamples, other.NodeSamples);
+
+        private static bool samplesEqual(ICollection<IList<string>> firstSampleList, ICollection<IList<string>> secondSampleList)
+        {
+            if (firstSampleList == null && secondSampleList == null)
+                return true;
+
+            // both items can't be null now, so if any single one is, then they're not equal
+            if (firstSampleList == null || secondSampleList == null)
+                return false;
+
+            return firstSampleList.Count == secondSampleList.Count
+                   // cannot use .Zip() without the selector function as it doesn't compile in android test project
+                   && firstSampleList.Zip(secondSampleList, (first, second) => (first, second))
+                                     .All(samples => samples.first.SequenceEqual(samples.second));
+        }
+    }
+}

osu.Game.Rulesets.Mania.Tests/Mods/TestSceneManiaModPerfect.cs

@@ -10,8 +10,10 @@ namespace osu.Game.Rulesets.Mania.Tests.Mods
 {
     public class TestSceneManiaModPerfect : ModPerfectTestScene
     {
+        protected override Ruleset CreatePlayerRuleset() => new ManiaRuleset();
+
         public TestSceneManiaModPerfect()
-            : base(new ManiaRuleset(), new ManiaModPerfect())
+            : base(new ManiaModPerfect())
         {
         }
 

osu.Game.Rulesets.Mania.Tests/Resources/special-skin/skin.ini

@@ -1,6 +1,12 @@
 [General]
-Version: 2.4
+Version: 2.5
 
 [Mania]
 Keys: 4
-ColumnLineWidth: 3,1,3,1,1
+ColumnLineWidth: 3,1,3,1,1
+Hit0: mania/hit0
+Hit50: mania/hit50
+Hit100: mania/hit100
+Hit200: mania/hit200
+Hit300: mania/hit300
+Hit300g: mania/hit300g

osu.Game.Rulesets.Mania.Tests/Skinning/TestSceneDrawableJudgement.cs

@@ -6,6 +6,7 @@ using System.Linq;
 using osu.Framework.Extensions;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mania.Scoring;
 using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Scoring;
@@ -16,14 +17,19 @@ namespace osu.Game.Rulesets.Mania.Tests.Skinning
     {
         public TestSceneDrawableJudgement()
         {
+            var hitWindows = new ManiaHitWindows();
+
             foreach (HitResult result in Enum.GetValues(typeof(HitResult)).OfType<HitResult>().Skip(1))
             {
-                AddStep("Show " + result.GetDescription(), () => SetContents(() =>
-                    new DrawableManiaJudgement(new JudgementResult(new HitObject(), new Judgement()) { Type = result }, null)
-                    {
-                        Anchor = Anchor.Centre,
-                        Origin = Anchor.Centre,
-                    }));
+                if (hitWindows.IsHitResultAllowed(result))
+                {
+                    AddStep("Show " + result.GetDescription(), () => SetContents(() =>
+                        new DrawableManiaJudgement(new JudgementResult(new HitObject(), new Judgement()) { Type = result }, null)
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                        }));
+                }
             }
         }
     }

osu.Game.Rulesets.Mania.Tests/TestSceneEditor.cs

@@ -15,8 +15,9 @@ namespace osu.Game.Rulesets.Mania.Tests
     {
         private readonly Bindable<ManiaScrollingDirection> direction = new Bindable<ManiaScrollingDirection>();
 
+        protected override Ruleset CreateEditorRuleset() => new ManiaRuleset();
+
         public TestSceneEditor()
-            : base(new ManiaRuleset())
         {
             AddStep("upwards scroll", () => direction.Value = ManiaScrollingDirection.Up);
             AddStep("downwards scroll", () => direction.Value = ManiaScrollingDirection.Down);

osu.Game.Rulesets.Mania.Tests/TestSceneManiaPlayer.cs

@@ -5,11 +5,8 @@ using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Mania.Tests
 {
-    public class TestScenePlayer : PlayerTestScene
+    public class TestSceneManiaPlayer : PlayerTestScene
     {
-        public TestScenePlayer()
-            : base(new ManiaRuleset())
-        {
-        }
+        protected override Ruleset CreatePlayerRuleset() => new ManiaRuleset();
     }
 }

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs

@@ -6,6 +6,7 @@ using System;
 using System.Linq;
 using System.Collections.Generic;
 using osu.Framework.Utils;
+using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
@@ -239,7 +240,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                         Duration = endTimeData.Duration,
                         Column = column,
                         Samples = HitObject.Samples,
-                        NodeSamples = (HitObject as IHasRepeats)?.NodeSamples
+                        NodeSamples = (HitObject as IHasRepeats)?.NodeSamples ?? defaultNodeSamples
                     });
                 }
                 else if (HitObject is IHasXPosition)
@@ -254,6 +255,16 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
                 return pattern;
             }
+
+            /// <remarks>
+            /// osu!mania-specific beatmaps in stable only play samples at the start of the hold note.
+            /// </remarks>
+            private List<IList<HitSampleInfo>> defaultNodeSamples
+                => new List<IList<HitSampleInfo>>
+                {
+                    HitObject.Samples,
+                    new List<HitSampleInfo>()
+                };
         }
     }
 }

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs

@@ -472,15 +472,23 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         /// <param name="time">The time to retrieve the sample info list from.</param>
         /// <returns></returns>
-        private IList<HitSampleInfo> sampleInfoListAt(double time)
+        private IList<HitSampleInfo> sampleInfoListAt(double time) => nodeSamplesAt(time)?.First() ?? HitObject.Samples;
+
+        /// <summary>
+        /// Retrieves the list of node samples that occur at time greater than or equal to <paramref name="time"/>.
+        /// </summary>
+        /// <param name="time">The time to retrieve node samples at.</param>
+        private List<IList<HitSampleInfo>> nodeSamplesAt(double time)
         {
             if (!(HitObject is IHasPathWithRepeats curveData))
-                return HitObject.Samples;
+                return null;
 
             double segmentTime = (EndTime - HitObject.StartTime) / spanCount;
 
             int index = (int)(segmentTime == 0 ? 0 : (time - HitObject.StartTime) / segmentTime);
-            return curveData.NodeSamples[index];
+
+            // avoid slicing the list & creating copies, if at all possible.
+            return index == 0 ? curveData.NodeSamples : curveData.NodeSamples.Skip(index).ToList();
         }
 
         /// <summary>
@@ -511,7 +519,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                     Duration = endTime - startTime,
                     Column = column,
                     Samples = HitObject.Samples,
-                    NodeSamples = (HitObject as IHasRepeats)?.NodeSamples
+                    NodeSamples = nodeSamplesAt(startTime)
                 };
             }
 

osu.Game.Rulesets.Mania/Resources/Testing/Beatmaps/convert-samples-expected-conversion.json

@@ -0,0 +1,30 @@
+{
+  "Mappings": [{
+    "StartTime": 1000.0,
+    "Objects": [{
+      "StartTime": 1000.0,
+      "EndTime": 2750.0,
+      "Column": 1,
+      "NodeSamples": [
+        ["normal-hitnormal"],
+        ["soft-hitnormal"],
+        ["drum-hitnormal"]
+      ]
+    }, {
+      "StartTime": 1875.0,
+      "EndTime": 2750.0,
+      "Column": 0,
+      "NodeSamples": [
+        ["soft-hitnormal"],
+        ["drum-hitnormal"]
+      ]
+    }]
+  }, {
+    "StartTime": 3750.0,
+    "Objects": [{
+      "StartTime": 3750.0,
+      "EndTime": 3750.0,
+      "Column": 3
+    }]
+  }]
+}

osu.Game.Rulesets.Mania/Resources/Testing/Beatmaps/convert-samples.osu

@@ -0,0 +1,16 @@
+osu file format v14
+
+[Difficulty]
+HPDrainRate:5
+CircleSize:5
+OverallDifficulty:5
+ApproachRate:5
+SliderMultiplier:1.4
+SliderTickRate:1
+
+[TimingPoints]
+0,500,4,1,0,100,1,0
+
+[HitObjects]
+88,99,1000,6,0,L|306:259,2,245,0|0|0,1:0|2:0|3:0,0:0:0:0:
+259,118,3750,1,0,0:0:0:0:

osu.Game.Rulesets.Mania/Resources/Testing/Beatmaps/mania-samples-expected-conversion.json

@@ -0,0 +1,25 @@
+{
+  "Mappings": [{
+    "StartTime": 500.0,
+    "Objects": [{
+      "StartTime": 500.0,
+      "EndTime": 1500.0,
+      "Column": 0,
+      "NodeSamples": [
+        ["normal-hitnormal"],
+        []
+      ]
+    }]
+  }, {
+    "StartTime": 2000.0,
+    "Objects": [{
+      "StartTime": 2000.0,
+      "EndTime": 3000.0,
+      "Column": 2,
+      "NodeSamples": [
+        ["drum-hitnormal"],
+        []
+      ]
+    }]
+  }]
+}

osu.Game.Rulesets.Mania/Resources/Testing/Beatmaps/mania-samples.osu

@@ -0,0 +1,19 @@
+osu file format v14
+
+[General]
+Mode: 3
+
+[Difficulty]
+HPDrainRate:5
+CircleSize:5
+OverallDifficulty:5
+ApproachRate:5
+SliderMultiplier:1.4
+SliderTickRate:1
+
+[TimingPoints]
+0,500,4,1,0,100,1,0
+
+[HitObjects]
+51,192,500,128,0,1500:1:0:0:0:
+256,192,2000,128,0,3000:3:0:0:0:

osu.Game.Rulesets.Mania/Skinning/ManiaLegacySkinTransformer.cs

@@ -11,6 +11,7 @@ using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Skinning;
+using System.Collections.Generic;
 
 namespace osu.Game.Rulesets.Mania.Skinning
 {
@@ -19,6 +20,36 @@ namespace osu.Game.Rulesets.Mania.Skinning
         private readonly ISkin source;
         private readonly ManiaBeatmap beatmap;
 
+        /// <summary>
+        /// Mapping of <see cref="HitResult"/> to their corresponding
+        /// <see cref="LegacyManiaSkinConfigurationLookups"/> value.
+        /// </summary>
+        private static readonly IReadOnlyDictionary<HitResult, LegacyManiaSkinConfigurationLookups> hitresult_mapping
+            = new Dictionary<HitResult, LegacyManiaSkinConfigurationLookups>
+            {
+                { HitResult.Perfect, LegacyManiaSkinConfigurationLookups.Hit300g },
+                { HitResult.Great, LegacyManiaSkinConfigurationLookups.Hit300 },
+                { HitResult.Good, LegacyManiaSkinConfigurationLookups.Hit200 },
+                { HitResult.Ok, LegacyManiaSkinConfigurationLookups.Hit100 },
+                { HitResult.Meh, LegacyManiaSkinConfigurationLookups.Hit50 },
+                { HitResult.Miss, LegacyManiaSkinConfigurationLookups.Hit0 }
+            };
+
+        /// <summary>
+        /// Mapping of <see cref="HitResult"/> to their corresponding
+        /// default filenames.
+        /// </summary>
+        private static readonly IReadOnlyDictionary<HitResult, string> default_hitresult_skin_filenames
+            = new Dictionary<HitResult, string>
+            {
+                { HitResult.Perfect, "mania-hit300g" },
+                { HitResult.Great, "mania-hit300" },
+                { HitResult.Good, "mania-hit200" },
+                { HitResult.Ok, "mania-hit100" },
+                { HitResult.Meh, "mania-hit50" },
+                { HitResult.Miss, "mania-hit0" }
+            };
+
         private Lazy<bool> isLegacySkin;
 
         /// <summary>
@@ -50,7 +81,7 @@ namespace osu.Game.Rulesets.Mania.Skinning
             switch (component)
             {
                 case GameplaySkinComponent<HitResult> resultComponent:
-                    return getResult(resultComponent);
+                    return getResult(resultComponent.Component);
 
                 case ManiaSkinComponent maniaComponent:
                     if (!isLegacySkin.Value || !hasKeyTexture.Value)
@@ -95,30 +126,13 @@ namespace osu.Game.Rulesets.Mania.Skinning
             return null;
         }
 
-        private Drawable getResult(GameplaySkinComponent<HitResult> resultComponent)
+        private Drawable getResult(HitResult result)
         {
-            switch (resultComponent.Component)
-            {
-                case HitResult.Miss:
-                    return this.GetAnimation("mania-hit0", true, true);
+            string filename = GetConfig<ManiaSkinConfigurationLookup, string>(
+                new ManiaSkinConfigurationLookup(hitresult_mapping[result])
+            )?.Value ?? default_hitresult_skin_filenames[result];
 
-                case HitResult.Meh:
-                    return this.GetAnimation("mania-hit50", true, true);
-
-                case HitResult.Ok:
-                    return this.GetAnimation("mania-hit100", true, true);
-
-                case HitResult.Good:
-                    return this.GetAnimation("mania-hit200", true, true);
-
-                case HitResult.Great:
-                    return this.GetAnimation("mania-hit300", true, true);
-
-                case HitResult.Perfect:
-                    return this.GetAnimation("mania-hit300g", true, true);
-            }
-
-            return null;
+            return this.GetAnimation(filename, true, true);
         }
 
         public Texture GetTexture(string componentName) => source.GetTexture(componentName);

osu.Game.Rulesets.Osu.Tests/Mods/OsuModTestScene.cs

@@ -0,0 +1,12 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Osu.Tests.Mods
+{
+    public class OsuModTestScene : ModTestScene
+    {
+        protected override Ruleset CreatePlayerRuleset() => new OsuRuleset();
+    }
+}

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModDifficultyAdjust.cs

@@ -9,17 +9,11 @@ using osu.Framework.Utils;
 using osu.Game.Graphics.Containers;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Osu.Tests.Mods
 {
-    public class TestSceneOsuModDifficultyAdjust : ModTestScene
+    public class TestSceneOsuModDifficultyAdjust : OsuModTestScene
     {
-        public TestSceneOsuModDifficultyAdjust()
-            : base(new OsuRuleset())
-        {
-        }
-
         [Test]
         public void TestNoAdjustment() => CreateModTest(new ModTestData
         {

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModDoubleTime.cs

@@ -4,17 +4,11 @@
 using NUnit.Framework;
 using osu.Framework.Utils;
 using osu.Game.Rulesets.Osu.Mods;
-using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Osu.Tests.Mods
 {
-    public class TestSceneOsuModDoubleTime : ModTestScene
+    public class TestSceneOsuModDoubleTime : OsuModTestScene
     {
-        public TestSceneOsuModDoubleTime()
-            : base(new OsuRuleset())
-        {
-        }
-
         [TestCase(0.5)]
         [TestCase(1.01)]
         [TestCase(1.5)]

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModHidden.cs

@@ -8,18 +8,12 @@ using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Tests.Visual;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Tests.Mods
 {
-    public class TestSceneOsuModHidden : ModTestScene
+    public class TestSceneOsuModHidden : OsuModTestScene
     {
-        public TestSceneOsuModHidden()
-            : base(new OsuRuleset())
-        {
-        }
-
         [Test]
         public void TestDefaultBeatmapTest() => CreateModTest(new ModTestData
         {

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModPerfect.cs

@@ -13,8 +13,10 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
 {
     public class TestSceneOsuModPerfect : ModPerfectTestScene
     {
+        protected override Ruleset CreatePlayerRuleset() => new OsuRuleset();
+
         public TestSceneOsuModPerfect()
-            : base(new OsuRuleset(), new OsuModPerfect())
+            : base(new OsuModPerfect())
         {
         }
 

osu.Game.Rulesets.Osu.Tests/TestSceneEditor.cs

@@ -9,9 +9,6 @@ namespace osu.Game.Rulesets.Osu.Tests
     [TestFixture]
     public class TestSceneEditor : EditorTestScene
     {
-        public TestSceneEditor()
-            : base(new OsuRuleset())
-        {
-        }
+        protected override Ruleset CreateEditorRuleset() => new OsuRuleset();
     }
 }

osu.Game.Rulesets.Osu.Tests/TestSceneHitCircleLongCombo.cs

@@ -4,19 +4,13 @@
 using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Tests.Visual;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
     [TestFixture]
-    public class TestSceneHitCircleLongCombo : PlayerTestScene
+    public class TestSceneHitCircleLongCombo : TestSceneOsuPlayer
     {
-        public TestSceneHitCircleLongCombo()
-            : base(new OsuRuleset())
-        {
-        }
-
         protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap

osu.Game.Rulesets.Osu.Tests/TestSceneMissHitWindowJudgements.cs

@@ -19,10 +19,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 {
     public class TestSceneMissHitWindowJudgements : ModTestScene
     {
-        public TestSceneMissHitWindowJudgements()
-            : base(new OsuRuleset())
-        {
-        }
+        protected override Ruleset CreatePlayerRuleset() => new OsuRuleset();
 
         [Test]
         public void TestMissViaEarlyHit()

osu.Game.Rulesets.Osu.Tests/TestSceneOsuPlayer.cs

@@ -9,9 +9,6 @@ namespace osu.Game.Rulesets.Osu.Tests
     [TestFixture]
     public class TestSceneOsuPlayer : PlayerTestScene
     {
-        public TestSceneOsuPlayer()
-            : base(new OsuRuleset())
-        {
-        }
+        protected override Ruleset CreatePlayerRuleset() => new OsuRuleset();
     }
 }

osu.Game.Rulesets.Osu.Tests/TestSceneSkinFallbacks.cs

@@ -25,13 +25,12 @@ using osu.Game.Tests.Visual;
 namespace osu.Game.Rulesets.Osu.Tests
 {
     [TestFixture]
-    public class TestSceneSkinFallbacks : PlayerTestScene
+    public class TestSceneSkinFallbacks : TestSceneOsuPlayer
     {
         private readonly TestSource testUserSkin;
         private readonly TestSource testBeatmapSkin;
 
         public TestSceneSkinFallbacks()
-            : base(new OsuRuleset())
         {
             testUserSkin = new TestSource("user");
             testBeatmapSkin = new TestSource("beatmap");

osu.Game.Rulesets.Osu.Tests/TestSceneSliderSnaking.cs

@@ -61,7 +61,9 @@ namespace osu.Game.Rulesets.Osu.Tests
         private DrawableSlider slider;
 
         [SetUpSteps]
-        public override void SetUpSteps() { }
+        public override void SetUpSteps()
+        {
+        }
 
         [TestCase(0)]
         [TestCase(1)]
@@ -132,10 +134,9 @@ namespace osu.Game.Rulesets.Osu.Tests
             checkPositionChange(16600, sliderRepeat, positionDecreased);
         }
 
-        private void retrieveDrawableSlider(int index) => AddStep($"retrieve {(index + 1).ToOrdinalWords()} slider", () =>
-        {
-            slider = (DrawableSlider)Player.DrawableRuleset.Playfield.AllHitObjects.ElementAt(index);
-        });
+        private void retrieveDrawableSlider(int index) =>
+            AddStep($"retrieve {(index + 1).ToOrdinalWords()} slider", () =>
+                slider = (DrawableSlider)Player.DrawableRuleset.Playfield.AllHitObjects.ElementAt(index));
 
         private void ensureSnakingIn(double startTime) => checkPositionChange(startTime, sliderEnd, positionIncreased);
         private void ensureNoSnakingIn(double startTime) => checkPositionChange(startTime, sliderEnd, positionRemainsSame);

osu.Game.Rulesets.Osu/Objects/Drawables/Connections/FollowPointConnection.cs

@@ -135,8 +135,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Connections
                 fp.Alpha = 0;
                 fp.Scale = new Vector2(1.5f * osuEnd.Scale);
 
-                if (firstTransformStartTime == null)
-                    firstTransformStartTime = fadeInTime;
+                firstTransformStartTime ??= fadeInTime;
 
                 fp.AnimationStartTime = fadeInTime;
 

osu.Game.Rulesets.Osu/UI/Cursor/CursorTrail.cs

@@ -237,6 +237,7 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
                     {
                         Position = new Vector2(part.Position.X - size.X / 2, part.Position.Y + size.Y / 2),
                         TexturePosition = textureRect.BottomLeft,
+                        TextureRect = new Vector4(0, 0, 1, 1),
                         Colour = DrawColourInfo.Colour.BottomLeft.Linear,
                         Time = part.Time
                     });
@@ -245,6 +246,7 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
                     {
                         Position = new Vector2(part.Position.X + size.X / 2, part.Position.Y + size.Y / 2),
                         TexturePosition = textureRect.BottomRight,
+                        TextureRect = new Vector4(0, 0, 1, 1),
                         Colour = DrawColourInfo.Colour.BottomRight.Linear,
                         Time = part.Time
                     });
@@ -253,6 +255,7 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
                     {
                         Position = new Vector2(part.Position.X + size.X / 2, part.Position.Y - size.Y / 2),
                         TexturePosition = textureRect.TopRight,
+                        TextureRect = new Vector4(0, 0, 1, 1),
                         Colour = DrawColourInfo.Colour.TopRight.Linear,
                         Time = part.Time
                     });
@@ -261,6 +264,7 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
                     {
                         Position = new Vector2(part.Position.X - size.X / 2, part.Position.Y - size.Y / 2),
                         TexturePosition = textureRect.TopLeft,
+                        TextureRect = new Vector4(0, 0, 1, 1),
                         Colour = DrawColourInfo.Colour.TopLeft.Linear,
                         Time = part.Time
                     });
@@ -290,6 +294,9 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
             [VertexMember(2, VertexAttribPointerType.Float)]
             public Vector2 TexturePosition;
 
+            [VertexMember(4, VertexAttribPointerType.Float)]
+            public Vector4 TextureRect;
+
             [VertexMember(1, VertexAttribPointerType.Float)]
             public float Time;
 

osu.Game.Rulesets.Taiko.Tests/Mods/TestSceneTaikoModPerfect.cs

@@ -12,8 +12,10 @@ namespace osu.Game.Rulesets.Taiko.Tests.Mods
 {
     public class TestSceneTaikoModPerfect : ModPerfectTestScene
     {
+        protected override Ruleset CreatePlayerRuleset() => new TestTaikoRuleset();
+
         public TestSceneTaikoModPerfect()
-            : base(new TestTaikoRuleset(), new TaikoModPerfect())
+            : base(new TaikoModPerfect())
         {
         }
 

osu.Game.Rulesets.Taiko.Tests/TestSceneEditor.cs

@@ -9,9 +9,6 @@ namespace osu.Game.Rulesets.Taiko.Tests
     [TestFixture]
     public class TestSceneEditor : EditorTestScene
     {
-        public TestSceneEditor()
-            : base(new TaikoRuleset())
-        {
-        }
+        protected override Ruleset CreateEditorRuleset() => new TaikoRuleset();
     }
 }

osu.Game.Rulesets.Taiko.Tests/TestSceneSampleOutput.cs

@@ -6,7 +6,6 @@ using osu.Framework.Testing;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Taiko.Objects.Drawables;
-using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Taiko.Tests
 {
@@ -14,13 +13,8 @@ namespace osu.Game.Rulesets.Taiko.Tests
     /// Taiko has some interesting rules for legacy mappings.
     /// </summary>
     [HeadlessTest]
-    public class TestSceneSampleOutput : PlayerTestScene
+    public class TestSceneSampleOutput : TestSceneTaikoPlayer
     {
-        public TestSceneSampleOutput()
-            : base(new TaikoRuleset())
-        {
-        }
-
         public override void SetUpSteps()
         {
             base.SetUpSteps();

osu.Game.Rulesets.Taiko.Tests/TestSceneSwellJudgements.cs

@@ -5,17 +5,11 @@ using System.Linq;
 using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Taiko.Objects;
-using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Taiko.Tests
 {
-    public class TestSceneSwellJudgements : PlayerTestScene
+    public class TestSceneSwellJudgements : TestSceneTaikoPlayer
     {
-        public TestSceneSwellJudgements()
-            : base(new TaikoRuleset())
-        {
-        }
-
         [Test]
         public void TestZeroTickTimeOffsets()
         {

osu.Game.Rulesets.Taiko.Tests/TestSceneTaikoPlayer.cs

@@ -0,0 +1,12 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Taiko.Tests
+{
+    public class TestSceneTaikoPlayer : PlayerTestScene
+    {
+        protected override Ruleset CreatePlayerRuleset() => new TaikoRuleset();
+    }
+}

osu.Game.Rulesets.Taiko.Tests/TestSceneTaikoSuddenDeath.cs

@@ -11,13 +11,8 @@ using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Taiko.Tests
 {
-    public class TestSceneTaikoSuddenDeath : PlayerTestScene
+    public class TestSceneTaikoSuddenDeath : TestSceneTaikoPlayer
     {
-        public TestSceneTaikoSuddenDeath()
-            : base(new TaikoRuleset())
-        {
-        }
-
         protected override bool AllowFail => true;
 
         protected override TestPlayer CreatePlayer(Ruleset ruleset)

osu.Game.Tests/Beatmaps/IO/ImportBeatmapTest.cs

@@ -5,16 +5,15 @@ using System;
 using System.IO;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using NUnit.Framework;
 using osu.Framework.Platform;
 using osu.Game.IPC;
 using osu.Framework.Allocation;
+using osu.Framework.Extensions;
 using osu.Framework.Logging;
 using osu.Game.Beatmaps;
-using osu.Game.Beatmaps.Formats;
 using osu.Game.IO;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Tests.Resources;
@@ -22,6 +21,7 @@ using SharpCompress.Archives;
 using SharpCompress.Archives.Zip;
 using SharpCompress.Common;
 using SharpCompress.Writers.Zip;
+using FileInfo = System.IO.FileInfo;
 
 namespace osu.Game.Tests.Beatmaps.IO
 {
@@ -93,6 +93,166 @@ namespace osu.Game.Tests.Beatmaps.IO
             }
         }
 
+        [Test]
+        public async Task TestImportThenImportWithReZip()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportWithReZip)))
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+
+                    var temp = TestResources.GetTestBeatmapForImport();
+
+                    string extractedFolder = $"{temp}_extracted";
+                    Directory.CreateDirectory(extractedFolder);
+
+                    try
+                    {
+                        var imported = await LoadOszIntoOsu(osu);
+
+                        string hashBefore = hashFile(temp);
+
+                        using (var zip = ZipArchive.Open(temp))
+                            zip.WriteToDirectory(extractedFolder);
+
+                        using (var zip = ZipArchive.Create())
+                        {
+                            zip.AddAllFromDirectory(extractedFolder);
+                            zip.SaveTo(temp, new ZipWriterOptions(CompressionType.Deflate));
+                        }
+
+                        // zip files differ because different compression or encoder.
+                        Assert.AreNotEqual(hashBefore, hashFile(temp));
+
+                        var importedSecondTime = await osu.Dependencies.Get<BeatmapManager>().Import(temp);
+
+                        ensureLoaded(osu);
+
+                        // but contents doesn't, so existing should still be used.
+                        Assert.IsTrue(imported.ID == importedSecondTime.ID);
+                        Assert.IsTrue(imported.Beatmaps.First().ID == importedSecondTime.Beatmaps.First().ID);
+                    }
+                    finally
+                    {
+                        Directory.Delete(extractedFolder, true);
+                    }
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        private string hashFile(string filename)
+        {
+            using (var s = File.OpenRead(filename))
+                return s.ComputeMD5Hash();
+        }
+
+        [Test]
+        public async Task TestImportThenImportWithChangedFile()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportWithChangedFile)))
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+
+                    var temp = TestResources.GetTestBeatmapForImport();
+
+                    string extractedFolder = $"{temp}_extracted";
+                    Directory.CreateDirectory(extractedFolder);
+
+                    try
+                    {
+                        var imported = await LoadOszIntoOsu(osu);
+
+                        using (var zip = ZipArchive.Open(temp))
+                            zip.WriteToDirectory(extractedFolder);
+
+                        // arbitrary write to non-hashed file
+                        using (var sw = new FileInfo(Directory.GetFiles(extractedFolder, "*.mp3").First()).AppendText())
+                            await sw.WriteLineAsync("text");
+
+                        using (var zip = ZipArchive.Create())
+                        {
+                            zip.AddAllFromDirectory(extractedFolder);
+                            zip.SaveTo(temp, new ZipWriterOptions(CompressionType.Deflate));
+                        }
+
+                        var importedSecondTime = await osu.Dependencies.Get<BeatmapManager>().Import(temp);
+
+                        ensureLoaded(osu);
+
+                        // check the newly "imported" beatmap is not the original.
+                        Assert.IsTrue(imported.ID != importedSecondTime.ID);
+                        Assert.IsTrue(imported.Beatmaps.First().ID != importedSecondTime.Beatmaps.First().ID);
+                    }
+                    finally
+                    {
+                        Directory.Delete(extractedFolder, true);
+                    }
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        [Test]
+        public async Task TestImportThenImportWithDifferentFilename()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportWithDifferentFilename)))
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+
+                    var temp = TestResources.GetTestBeatmapForImport();
+
+                    string extractedFolder = $"{temp}_extracted";
+                    Directory.CreateDirectory(extractedFolder);
+
+                    try
+                    {
+                        var imported = await LoadOszIntoOsu(osu);
+
+                        using (var zip = ZipArchive.Open(temp))
+                            zip.WriteToDirectory(extractedFolder);
+
+                        // change filename
+                        var firstFile = new FileInfo(Directory.GetFiles(extractedFolder).First());
+                        firstFile.MoveTo(Path.Combine(firstFile.DirectoryName, $"{firstFile.Name}-changed{firstFile.Extension}"));
+
+                        using (var zip = ZipArchive.Create())
+                        {
+                            zip.AddAllFromDirectory(extractedFolder);
+                            zip.SaveTo(temp, new ZipWriterOptions(CompressionType.Deflate));
+                        }
+
+                        var importedSecondTime = await osu.Dependencies.Get<BeatmapManager>().Import(temp);
+
+                        ensureLoaded(osu);
+
+                        // check the newly "imported" beatmap is not the original.
+                        Assert.IsTrue(imported.ID != importedSecondTime.ID);
+                        Assert.IsTrue(imported.Beatmaps.First().ID != importedSecondTime.Beatmaps.First().ID);
+                    }
+                    finally
+                    {
+                        Directory.Delete(extractedFolder, true);
+                    }
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
         [Test]
         public async Task TestImportCorruptThenImport()
         {
@@ -175,7 +335,7 @@ namespace osu.Game.Tests.Beatmaps.IO
                     var breakTemp = TestResources.GetTestBeatmapForImport();
 
                     MemoryStream brokenOsu = new MemoryStream();
-                    MemoryStream brokenOsz = new MemoryStream(File.ReadAllBytes(breakTemp));
+                    MemoryStream brokenOsz = new MemoryStream(await File.ReadAllBytesAsync(breakTemp));
 
                     File.Delete(breakTemp);
 
@@ -212,37 +372,6 @@ namespace osu.Game.Tests.Beatmaps.IO
             }
         }
 
-        [Test]
-        public async Task TestImportThenImportDifferentHash()
-        {
-            // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportDifferentHash)))
-            {
-                try
-                {
-                    var osu = loadOsu(host);
-                    var manager = osu.Dependencies.Get<BeatmapManager>();
-
-                    var imported = await LoadOszIntoOsu(osu);
-
-                    imported.Hash += "-changed";
-                    manager.Update(imported);
-
-                    var importedSecondTime = await LoadOszIntoOsu(osu);
-
-                    Assert.IsTrue(imported.ID != importedSecondTime.ID);
-                    Assert.IsTrue(imported.Beatmaps.First().ID < importedSecondTime.Beatmaps.First().ID);
-
-                    // only one beatmap will exist as the online set ID matched, causing purging of the first import.
-                    checkBeatmapSetCount(osu, 1);
-                }
-                finally
-                {
-                    host.Exit();
-                }
-            }
-        }
-
         [Test]
         public async Task TestImportThenDeleteThenImport()
         {
@@ -522,7 +651,7 @@ namespace osu.Game.Tests.Beatmaps.IO
 
                     using (var resourceForkFile = File.CreateText(resourceForkFilePath))
                     {
-                        resourceForkFile.WriteLine("adding content so that it's not empty");
+                        await resourceForkFile.WriteLineAsync("adding content so that it's not empty");
                     }
 
                     try
@@ -599,23 +728,17 @@ namespace osu.Game.Tests.Beatmaps.IO
                     await osu.Dependencies.Get<BeatmapManager>().Import(temp);
 
                     BeatmapSetInfo setToUpdate = manager.GetAllUsableBeatmapSets()[0];
+
+                    var beatmapInfo = setToUpdate.Beatmaps.First(b => b.RulesetID == 0);
                     Beatmap beatmapToUpdate = (Beatmap)manager.GetWorkingBeatmap(setToUpdate.Beatmaps.First(b => b.RulesetID == 0)).Beatmap;
                     BeatmapSetFileInfo fileToUpdate = setToUpdate.Files.First(f => beatmapToUpdate.BeatmapInfo.Path.Contains(f.Filename));
 
-                    using (var stream = new MemoryStream())
-                    {
-                        using (var writer = new StreamWriter(stream, Encoding.UTF8, 1024, true))
-                        {
-                            beatmapToUpdate.HitObjects.Clear();
-                            beatmapToUpdate.HitObjects.Add(new HitCircle { StartTime = 5000 });
+                    string oldMd5Hash = beatmapToUpdate.BeatmapInfo.MD5Hash;
 
-                            new LegacyBeatmapEncoder(beatmapToUpdate).Encode(writer);
-                        }
+                    beatmapToUpdate.HitObjects.Clear();
+                    beatmapToUpdate.HitObjects.Add(new HitCircle { StartTime = 5000 });
 
-                        stream.Seek(0, SeekOrigin.Begin);
-
-                        manager.UpdateFile(setToUpdate, fileToUpdate, stream);
-                    }
+                    manager.Save(beatmapInfo, beatmapToUpdate);
 
                     // Check that the old file reference has been removed
                     Assert.That(manager.QueryBeatmapSet(s => s.ID == setToUpdate.ID).Files.All(f => f.ID != fileToUpdate.ID));
@@ -624,6 +747,7 @@ namespace osu.Game.Tests.Beatmaps.IO
                     Beatmap updatedBeatmap = (Beatmap)manager.GetWorkingBeatmap(manager.QueryBeatmap(b => b.ID == beatmapToUpdate.BeatmapInfo.ID)).Beatmap;
                     Assert.That(updatedBeatmap.HitObjects.Count, Is.EqualTo(1));
                     Assert.That(updatedBeatmap.HitObjects[0].StartTime, Is.EqualTo(5000));
+                    Assert.That(updatedBeatmap.BeatmapInfo.MD5Hash, Is.Not.EqualTo(oldMd5Hash));
                 }
                 finally
                 {

osu.Game.Tests/Chat/MessageFormatterTests.cs

@@ -428,22 +428,27 @@ namespace osu.Game.Tests.Chat
             Assert.AreEqual(5, result.Links.Count);
 
             Link f = result.Links.Find(l => l.Url == "https://osu.ppy.sh/wiki/wiki links");
+            Assert.That(f, Is.Not.Null);
             Assert.AreEqual(44, f.Index);
             Assert.AreEqual(10, f.Length);
 
             f = result.Links.Find(l => l.Url == "http://www.simple-test.com");
+            Assert.That(f, Is.Not.Null);
             Assert.AreEqual(10, f.Index);
             Assert.AreEqual(11, f.Length);
 
             f = result.Links.Find(l => l.Url == "http://google.com");
+            Assert.That(f, Is.Not.Null);
             Assert.AreEqual(97, f.Index);
             Assert.AreEqual(4, f.Length);
 
             f = result.Links.Find(l => l.Url == "https://osu.ppy.sh");
+            Assert.That(f, Is.Not.Null);
             Assert.AreEqual(78, f.Index);
             Assert.AreEqual(18, f.Length);
 
             f = result.Links.Find(l => l.Url == "\uD83D\uDE12");
+            Assert.That(f, Is.Not.Null);
             Assert.AreEqual(101, f.Index);
             Assert.AreEqual(3, f.Length);
         }

osu.Game.Tests/Gameplay/TestSceneGameplayClockContainer.cs

@@ -0,0 +1,25 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using NUnit.Framework;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Screens.Play;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Tests.Gameplay
+{
+    public class TestSceneGameplayClockContainer : OsuTestScene
+    {
+        [Test]
+        public void TestStartThenElapsedTime()
+        {
+            GameplayClockContainer gcc = null;
+
+            AddStep("create container", () => Add(gcc = new GameplayClockContainer(CreateWorkingBeatmap(new OsuRuleset().RulesetInfo), Array.Empty<Mod>(), 0)));
+            AddStep("start track", () => gcc.Start());
+            AddUntilStep("elapsed greater than zero", () => gcc.GameplayClock.ElapsedFrameTime > 0);
+        }
+    }
+}

osu.Game.Tests/Gameplay/TestSceneHitObjectSamples.cs

@@ -16,17 +16,16 @@ using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.Formats;
 using osu.Game.IO;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Osu;
 using osu.Game.Skinning;
 using osu.Game.Storyboards;
 using osu.Game.Tests.Resources;
-using osu.Game.Tests.Visual;
+using osu.Game.Tests.Visual.Gameplay;
 using osu.Game.Users;
 
 namespace osu.Game.Tests.Gameplay
 {
     [HeadlessTest]
-    public class TestSceneHitObjectSamples : PlayerTestScene
+    public class TestSceneHitObjectSamples : OsuPlayerTestScene
     {
         private readonly SkinInfo userSkinInfo = new SkinInfo();
 
@@ -44,11 +43,6 @@ namespace osu.Game.Tests.Gameplay
 
         protected override bool HasCustomSteps => true;
 
-        public TestSceneHitObjectSamples()
-            : base(new OsuRuleset())
-        {
-        }
-
         private SkinSourceDependencyContainer dependencies;
 
         protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)

osu.Game.Tests/Gameplay/TestSceneStoryboardSamples.cs

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Threading.Tasks;
@@ -10,7 +11,12 @@ using osu.Framework.Audio.Sample;
 using osu.Framework.IO.Stores;
 using osu.Framework.Testing;
 using osu.Game.Audio;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Screens.Play;
 using osu.Game.Skinning;
+using osu.Game.Storyboards;
+using osu.Game.Storyboards.Drawables;
 using osu.Game.Tests.Resources;
 using osu.Game.Tests.Visual;
 
@@ -43,6 +49,27 @@ namespace osu.Game.Tests.Gameplay
             AddAssert("sample is non-null", () => channel != null);
         }
 
+        [Test]
+        public void TestSamplePlaybackAtZero()
+        {
+            GameplayClockContainer gameplayContainer = null;
+            DrawableStoryboardSample sample = null;
+
+            AddStep("create container", () =>
+            {
+                Add(gameplayContainer = new GameplayClockContainer(CreateWorkingBeatmap(new OsuRuleset().RulesetInfo), Array.Empty<Mod>(), 0));
+
+                gameplayContainer.Add(sample = new DrawableStoryboardSample(new StoryboardSampleInfo(string.Empty, 0, 1))
+                {
+                    Clock = gameplayContainer.GameplayClock
+                });
+            });
+
+            AddStep("start time", () => gameplayContainer.Start());
+
+            AddUntilStep("sample playback succeeded", () => sample.LifetimeEnd < double.MaxValue);
+        }
+
         private class TestSkin : LegacySkin
         {
             public TestSkin(string resourceName, AudioManager audioManager)
@@ -60,11 +87,11 @@ namespace osu.Game.Tests.Gameplay
                 this.resourceName = resourceName;
             }
 
-            public byte[] Get(string name) => name == resourceName ? TestResources.GetStore().Get("Resources/test-sample.mp3") : null;
+            public byte[] Get(string name) => name == resourceName ? TestResources.GetStore().Get("Resources/Samples/test-sample.mp3") : null;
 
-            public Task<byte[]> GetAsync(string name) => name == resourceName ? TestResources.GetStore().GetAsync("Resources/test-sample.mp3") : null;
+            public Task<byte[]> GetAsync(string name) => name == resourceName ? TestResources.GetStore().GetAsync("Resources/Samples/test-sample.mp3") : null;
 
-            public Stream GetStream(string name) => name == resourceName ? TestResources.GetStore().GetStream("Resources/test-sample.mp3") : null;
+            public Stream GetStream(string name) => name == resourceName ? TestResources.GetStore().GetStream("Resources/Samples/test-sample.mp3") : null;
 
             public IEnumerable<string> GetAvailableResources() => new[] { resourceName };
 

osu.Game.Tests/Scores/IO/ImportScoreTest.cs

@@ -183,11 +183,8 @@ namespace osu.Game.Tests.Scores.IO
         {
             var beatmapManager = osu.Dependencies.Get<BeatmapManager>();
 
-            if (score.Beatmap == null)
-                score.Beatmap = beatmapManager.GetAllUsableBeatmapSets().First().Beatmaps.First();
-
-            if (score.Ruleset == null)
-                score.Ruleset = new OsuRuleset().RulesetInfo;
+            score.Beatmap ??= beatmapManager.GetAllUsableBeatmapSets().First().Beatmaps.First();
+            score.Ruleset ??= new OsuRuleset().RulesetInfo;
 
             var scoreManager = osu.Dependencies.Get<ScoreManager>();
             await scoreManager.Import(score, archive);

osu.Game.Tests/Testing/TestSceneRulesetDependencies.cs

@@ -0,0 +1,95 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Audio.Track;
+using osu.Framework.Configuration.Tracking;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.IO.Stores;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Configuration;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Configuration;
+using osu.Game.Rulesets.Difficulty;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.UI;
+using osu.Game.Tests.Resources;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Tests.Testing
+{
+    /// <summary>
+    /// A test scene ensuring the dependencies for the
+    /// provided ruleset below are cached at the base implementation.
+    /// </summary>
+    [HeadlessTest]
+    public class TestSceneRulesetDependencies : OsuTestScene
+    {
+        protected override Ruleset CreateRuleset() => new TestRuleset();
+
+        [Test]
+        public void TestRetrieveTexture()
+        {
+            AddAssert("ruleset texture retrieved", () =>
+                Dependencies.Get<TextureStore>().Get(@"test-image") != null);
+        }
+
+        [Test]
+        public void TestRetrieveSample()
+        {
+            AddAssert("ruleset sample retrieved", () =>
+                Dependencies.Get<ISampleStore>().Get(@"test-sample") != null);
+        }
+
+        [Test]
+        public void TestResolveConfigManager()
+        {
+            AddAssert("ruleset config resolved", () =>
+                Dependencies.Get<TestRulesetConfigManager>() != null);
+        }
+
+        private class TestRuleset : Ruleset
+        {
+            public override string Description => string.Empty;
+            public override string ShortName => string.Empty;
+
+            public TestRuleset()
+            {
+                // temporary ID to let RulesetConfigCache pass our
+                // config manager to the ruleset dependencies.
+                RulesetInfo.ID = -1;
+            }
+
+            public override IResourceStore<byte[]> CreateResourceStore() => new NamespacedResourceStore<byte[]>(TestResources.GetStore(), @"Resources");
+            public override IRulesetConfigManager CreateConfig(SettingsStore settings) => new TestRulesetConfigManager();
+
+            public override IEnumerable<Mod> GetModsFor(ModType type) => Array.Empty<Mod>();
+            public override DrawableRuleset CreateDrawableRulesetWith(IBeatmap beatmap, IReadOnlyList<Mod> mods = null) => null;
+            public override IBeatmapConverter CreateBeatmapConverter(IBeatmap beatmap) => null;
+            public override DifficultyCalculator CreateDifficultyCalculator(WorkingBeatmap beatmap) => null;
+        }
+
+        private class TestRulesetConfigManager : IRulesetConfigManager
+        {
+            public void Load()
+            {
+            }
+
+            public bool Save() => true;
+
+            public TrackedSettings CreateTrackedSettings() => new TrackedSettings();
+
+            public void LoadInto(TrackedSettings settings)
+            {
+            }
+
+            public void Dispose()
+            {
+            }
+        }
+    }
+}

osu.Game.Tests/Visual/Background/TestSceneUserDimBackgrounds.cs

@@ -19,6 +19,7 @@ using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Rulesets;
+using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Scoring;
 using osu.Game.Screens;
@@ -27,6 +28,7 @@ using osu.Game.Screens.Play;
 using osu.Game.Screens.Play.PlayerSettings;
 using osu.Game.Screens.Ranking;
 using osu.Game.Screens.Select;
+using osu.Game.Tests.Beatmaps;
 using osu.Game.Tests.Resources;
 using osu.Game.Users;
 using osuTK;
@@ -186,9 +188,15 @@ namespace osu.Game.Tests.Visual.Background
         public void TestTransition()
         {
             performFullSetup();
+
             FadeAccessibleResults results = null;
-            AddStep("Transition to Results", () => player.Push(results =
-                new FadeAccessibleResults(new ScoreInfo { User = new User { Username = "osu!" } })));
+
+            AddStep("Transition to Results", () => player.Push(results = new FadeAccessibleResults(new ScoreInfo
+            {
+                User = new User { Username = "osu!" },
+                Beatmap = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo
+            })));
+
             AddUntilStep("Wait for results is current", () => results.IsCurrentScreen());
             AddUntilStep("Screen is undimmed, original background retained", () =>
                 songSelect.IsBackgroundUndimmed() && songSelect.IsBackgroundCurrent() && results.IsBlurCorrect());

osu.Game.Tests/Visual/Editing/TestSceneEditorChangeStates.cs

@@ -4,6 +4,7 @@
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Testing;
+using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
@@ -13,13 +14,10 @@ namespace osu.Game.Tests.Visual.Editing
 {
     public class TestSceneEditorChangeStates : EditorTestScene
     {
-        public TestSceneEditorChangeStates()
-            : base(new OsuRuleset())
-        {
-        }
-
         private EditorBeatmap editorBeatmap;
 
+        protected override Ruleset CreateEditorRuleset() => new OsuRuleset();
+
         public override void SetUpSteps()
         {
             base.SetUpSteps();

osu.Game.Tests/Visual/Gameplay/OsuPlayerTestScene.cs

@@ -0,0 +1,16 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Osu;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    /// <summary>
+    /// A <see cref="PlayerTestScene"/> with an arbitrary ruleset value to test with.
+    /// </summary>
+    public abstract class OsuPlayerTestScene : PlayerTestScene
+    {
+        protected override Ruleset CreatePlayerRuleset() => new OsuRuleset();
+    }
+}

osu.Game.Tests/Visual/Gameplay/TestSceneCompletionCancellation.cs

@@ -10,14 +10,13 @@ using osu.Framework.Testing;
 using osu.Framework.Timing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Storyboards;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
-    public class TestSceneCompletionCancellation : PlayerTestScene
+    public class TestSceneCompletionCancellation : OsuPlayerTestScene
     {
         private Track track;
 
@@ -29,11 +28,6 @@ namespace osu.Game.Tests.Visual.Gameplay
 
         protected override bool AllowFail => false;
 
-        public TestSceneCompletionCancellation()
-            : base(new OsuRuleset())
-        {
-        }
-
         [SetUpSteps]
         public override void SetUpSteps()
         {

osu.Game.Tests/Visual/Gameplay/TestSceneGameplayRewinding.cs

@@ -10,23 +10,17 @@ using osu.Framework.Utils;
 using osu.Framework.Timing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Storyboards;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
-    public class TestSceneGameplayRewinding : PlayerTestScene
+    public class TestSceneGameplayRewinding : OsuPlayerTestScene
     {
         [Resolved]
         private AudioManager audioManager { get; set; }
 
-        public TestSceneGameplayRewinding()
-            : base(new OsuRuleset())
-        {
-        }
-
         private Track track;
 
         protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard storyboard = null)

osu.Game.Tests/Visual/Gameplay/TestScenePause.cs

@@ -10,14 +10,13 @@ using osu.Framework.Testing;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Cursor;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Play;
 using osuTK;
 using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
-    public class TestScenePause : PlayerTestScene
+    public class TestScenePause : OsuPlayerTestScene
     {
         protected new PausePlayer Player => (PausePlayer)base.Player;
 
@@ -26,7 +25,6 @@ namespace osu.Game.Tests.Visual.Gameplay
         protected override Container<Drawable> Content => content;
 
         public TestScenePause()
-            : base(new OsuRuleset())
         {
             base.Content.Add(content = new MenuCursorContainer { RelativeSizeAxes = Axes.Both });
         }

osu.Game.Tests/Visual/Gameplay/TestScenePauseWhenInactive.cs

@@ -8,12 +8,11 @@ using osu.Framework.Platform;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Osu;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
     [HeadlessTest] // we alter unsafe properties on the game host to test inactive window state.
-    public class TestScenePauseWhenInactive : PlayerTestScene
+    public class TestScenePauseWhenInactive : OsuPlayerTestScene
     {
         protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
@@ -27,11 +26,6 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Resolved]
         private GameHost host { get; set; }
 
-        public TestScenePauseWhenInactive()
-            : base(new OsuRuleset())
-        {
-        }
-
         [Test]
         public void TestDoesntPauseDuringIntro()
         {

osu.Game.Tests/Visual/Gameplay/TestSceneReplay.cs

@@ -19,7 +19,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         {
             var beatmap = Beatmap.Value.GetPlayableBeatmap(ruleset.RulesetInfo, Array.Empty<Mod>());
 
-            return new ScoreAccessibleReplayPlayer(ruleset.GetAutoplayMod().CreateReplayScore(beatmap));
+            return new ScoreAccessibleReplayPlayer(ruleset.GetAutoplayMod()?.CreateReplayScore(beatmap));
         }
 
         protected override void AddCheckSteps()

osu.Game.Tests/Visual/Multiplayer/TestSceneDrawableRoomPlaylist.cs

@@ -4,12 +4,18 @@
 using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Audio;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Platform;
 using osu.Framework.Testing;
+using osu.Game.Beatmaps;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.Multiplayer;
+using osu.Game.Overlays;
+using osu.Game.Rulesets;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Screens.Multi;
@@ -23,6 +29,18 @@ namespace osu.Game.Tests.Visual.Multiplayer
     {
         private TestPlaylist playlist;
 
+        private BeatmapManager manager;
+        private RulesetStore rulesets;
+
+        [BackgroundDependencyLoader]
+        private void load(GameHost host, AudioManager audio)
+        {
+            Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
+            Dependencies.Cache(manager = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, audio, host, Beatmap.Default));
+
+            manager.Import(new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo.BeatmapSet).Wait();
+        }
+
         [Test]
         public void TestNonEditableNonSelectable()
         {
@@ -182,6 +200,28 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddStep("click delete button", () => InputManager.Click(MouseButton.Left));
         }
 
+        [Test]
+        public void TestDownloadButtonHiddenInitiallyWhenBeatmapExists()
+        {
+            createPlaylist(new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo);
+
+            AddAssert("download button hidden", () => !playlist.ChildrenOfType<BeatmapDownloadTrackingComposite>().Single().IsPresent);
+        }
+
+        [Test]
+        public void TestDownloadButtonVisibleInitiallyWhenBeatmapDoesNotExist()
+        {
+            var byOnlineId = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo;
+            byOnlineId.BeatmapSet.OnlineBeatmapSetID = 1337; // Some random ID that does not exist locally.
+
+            var byChecksum = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo;
+            byChecksum.MD5Hash = "1337"; // Some random checksum that does not exist locally.
+
+            createPlaylist(byOnlineId, byChecksum);
+
+            AddAssert("download buttons shown", () => playlist.ChildrenOfType<BeatmapDownloadTrackingComposite>().All(d => d.IsPresent));
+        }
+
         private void moveToItem(int index, Vector2? offset = null)
             => AddStep($"move mouse to item {index}", () => InputManager.MoveMouseTo(playlist.ChildrenOfType<OsuRearrangeableListItem<PlaylistItem>>().ElementAt(index), offset));
 
@@ -235,6 +275,39 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddUntilStep("wait for items to load", () => playlist.ItemMap.Values.All(i => i.IsLoaded));
         }
 
+        private void createPlaylist(params BeatmapInfo[] beatmaps)
+        {
+            AddStep("create playlist", () =>
+            {
+                Child = playlist = new TestPlaylist(false, false)
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(500, 300)
+                };
+
+                int index = 0;
+
+                foreach (var b in beatmaps)
+                {
+                    playlist.Items.Add(new PlaylistItem
+                    {
+                        ID = index++,
+                        Beatmap = { Value = b },
+                        Ruleset = { Value = new OsuRuleset().RulesetInfo },
+                        RequiredMods =
+                        {
+                            new OsuModHardRock(),
+                            new OsuModDoubleTime(),
+                            new OsuModAutoplay()
+                        }
+                    });
+                }
+            });
+
+            AddUntilStep("wait for items to load", () => playlist.ItemMap.Values.All(i => i.IsLoaded));
+        }
+
         private class TestPlaylist : DrawableRoomPlaylist
         {
             public new IReadOnlyDictionary<PlaylistItem, RearrangeableListItem<PlaylistItem>> ItemMap => base.ItemMap;

osu.Game.Tests/Visual/Multiplayer/TestSceneLoungeRoomsContainer.cs

@@ -141,6 +141,9 @@ namespace osu.Game.Tests.Visual.Multiplayer
             }
 
             public readonly BindableList<Room> Rooms = new BindableList<Room>();
+
+            public Bindable<bool> InitialRoomsReceived { get; } = new Bindable<bool>(true);
+
             IBindableList<Room> IRoomManager.Rooms => Rooms;
 
             public void CreateRoom(Room room, Action<Room> onSuccess = null, Action<string> onError = null) => Rooms.Add(room);

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchSettingsOverlay.cs

@@ -133,6 +133,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
                 remove { }
             }
 
+            public Bindable<bool> InitialRoomsReceived { get; } = new Bindable<bool>(true);
+
             public IBindableList<Room> Rooms { get; } = null;
 
             public void CreateRoom(Room room, Action<Room> onSuccess = null, Action<string> onError = null)

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchSubScreen.cs

@@ -5,7 +5,9 @@ using System;
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio;
 using osu.Framework.Bindables;
+using osu.Framework.Platform;
 using osu.Framework.Screens;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps;
@@ -29,14 +31,20 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Cached(typeof(IRoomManager))]
         private readonly TestRoomManager roomManager = new TestRoomManager();
 
-        [Resolved]
-        private BeatmapManager beatmaps { get; set; }
-
-        [Resolved]
-        private RulesetStore rulesets { get; set; }
+        private BeatmapManager manager;
+        private RulesetStore rulesets;
 
         private TestMatchSubScreen match;
 
+        [BackgroundDependencyLoader]
+        private void load(GameHost host, AudioManager audio)
+        {
+            Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
+            Dependencies.Cache(manager = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, audio, host, Beatmap.Default));
+
+            manager.Import(new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo.BeatmapSet).Wait();
+        }
+
         [SetUp]
         public void Setup() => Schedule(() =>
         {
@@ -75,10 +83,49 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddAssert("first playlist item selected", () => match.SelectedItem.Value == Room.Playlist[0]);
         }
 
+        [Test]
+        public void TestBeatmapUpdatedOnReImport()
+        {
+            BeatmapSetInfo importedSet = null;
+
+            AddStep("import altered beatmap", () =>
+            {
+                var beatmap = new TestBeatmap(new OsuRuleset().RulesetInfo);
+                beatmap.BeatmapInfo.BaseDifficulty.CircleSize = 1;
+
+                importedSet = manager.Import(beatmap.BeatmapInfo.BeatmapSet).Result;
+            });
+
+            AddStep("load room", () =>
+            {
+                Room.Name.Value = "my awesome room";
+                Room.Host.Value = new User { Id = 2, Username = "peppy" };
+                Room.Playlist.Add(new PlaylistItem
+                {
+                    Beatmap = { Value = importedSet.Beatmaps[0] },
+                    Ruleset = { Value = new OsuRuleset().RulesetInfo }
+                });
+            });
+
+            AddStep("create room", () =>
+            {
+                InputManager.MoveMouseTo(match.ChildrenOfType<MatchSettingsOverlay.CreateRoomButton>().Single());
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddAssert("match has altered beatmap", () => match.Beatmap.Value.Beatmap.BeatmapInfo.BaseDifficulty.CircleSize == 1);
+
+            AddStep("re-import original beatmap", () => manager.Import(new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo.BeatmapSet).Wait());
+
+            AddAssert("match has original beatmap", () => match.Beatmap.Value.Beatmap.BeatmapInfo.BaseDifficulty.CircleSize != 1);
+        }
+
         private class TestMatchSubScreen : MatchSubScreen
         {
             public new Bindable<PlaylistItem> SelectedItem => base.SelectedItem;
 
+            public new Bindable<WorkingBeatmap> Beatmap => base.Beatmap;
+
             public TestMatchSubScreen(Room room)
                 : base(room)
             {
@@ -93,6 +140,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
                 remove => throw new NotImplementedException();
             }
 
+            public Bindable<bool> InitialRoomsReceived { get; } = new Bindable<bool>(true);
+
             public IBindableList<Room> Rooms { get; } = new BindableList<Room>();
 
             public void CreateRoom(Room room, Action<Room> onSuccess = null, Action<string> onError = null)

osu.Game.Tests/Visual/Multiplayer/TestSceneTimeshiftResultsScreen.cs

@@ -0,0 +1,124 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
+using osu.Game.Online.Multiplayer;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Scoring;
+using osu.Game.Screens.Multi.Ranking;
+using osu.Game.Tests.Beatmaps;
+using osu.Game.Users;
+
+namespace osu.Game.Tests.Visual.Multiplayer
+{
+    public class TestSceneTimeshiftResultsScreen : ScreenTestScene
+    {
+        private bool roomsReceived;
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            roomsReceived = false;
+            bindHandler();
+        });
+
+        [Test]
+        public void TestShowResultsWithScore()
+        {
+            createResults(new TestScoreInfo(new OsuRuleset().RulesetInfo));
+            AddWaitStep("wait for display", 5);
+        }
+
+        [Test]
+        public void TestShowResultsNullScore()
+        {
+            createResults(null);
+            AddWaitStep("wait for display", 5);
+        }
+
+        [Test]
+        public void TestShowResultsNullScoreWithDelay()
+        {
+            AddStep("bind delayed handler", () => bindHandler(3000));
+            createResults(null);
+            AddUntilStep("wait for rooms to be received", () => roomsReceived);
+            AddWaitStep("wait for display", 5);
+        }
+
+        private void createResults(ScoreInfo score)
+        {
+            AddStep("load results", () =>
+            {
+                LoadScreen(new TimeshiftResultsScreen(score, 1, new PlaylistItem
+                {
+                    Beatmap = { Value = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo },
+                    Ruleset = { Value = new OsuRuleset().RulesetInfo }
+                }));
+            });
+        }
+
+        private void bindHandler(double delay = 0)
+        {
+            var roomScores = new List<RoomScore>();
+
+            for (int i = 0; i < 10; i++)
+            {
+                roomScores.Add(new RoomScore
+                {
+                    ID = i,
+                    Accuracy = 0.9 - 0.01 * i,
+                    EndedAt = DateTimeOffset.Now.Subtract(TimeSpan.FromHours(i)),
+                    Passed = true,
+                    Rank = ScoreRank.B,
+                    MaxCombo = 999,
+                    TotalScore = 999999 - i * 1000,
+                    User = new User
+                    {
+                        Id = 2,
+                        Username = $"peppy{i}",
+                        CoverUrl = "https://osu.ppy.sh/images/headers/profile-covers/c3.jpg",
+                    },
+                    Statistics =
+                    {
+                        { HitResult.Miss, 1 },
+                        { HitResult.Meh, 50 },
+                        { HitResult.Good, 100 },
+                        { HitResult.Great, 300 },
+                    }
+                });
+            }
+
+            ((DummyAPIAccess)API).HandleRequest = request =>
+            {
+                switch (request)
+                {
+                    case GetRoomPlaylistScoresRequest r:
+                        if (delay == 0)
+                            success();
+                        else
+                        {
+                            Task.Run(async () =>
+                            {
+                                await Task.Delay(TimeSpan.FromMilliseconds(delay));
+                                Schedule(success);
+                            });
+                        }
+
+                        void success()
+                        {
+                            r.TriggerSuccess(new RoomPlaylistScores { Scores = roomScores });
+                            roomsReceived = true;
+                        }
+
+                        break;
+                }
+            };
+        }
+    }
+}

osu.Game.Tests/Visual/Navigation/OsuGameTestScene.cs

@@ -17,6 +17,7 @@ using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.API;
 using osu.Game.Overlays;
 using osu.Game.Rulesets;
+using osu.Game.Scoring;
 using osu.Game.Screens;
 using osu.Game.Screens.Menu;
 using osuTK.Graphics;
@@ -100,6 +101,8 @@ namespace osu.Game.Tests.Visual.Navigation
 
             public new BeatmapManager BeatmapManager => base.BeatmapManager;
 
+            public new ScoreManager ScoreManager => base.ScoreManager;
+
             public new SettingsPanel Settings => base.Settings;
 
             public new MusicController MusicController => base.MusicController;

osu.Game.Tests/Visual/Navigation/TestScenePresentScore.cs

@@ -0,0 +1,155 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Screens;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Mania;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Scoring;
+using osu.Game.Screens.Menu;
+using osu.Game.Screens.Play;
+using osu.Game.Screens.Ranking;
+
+namespace osu.Game.Tests.Visual.Navigation
+{
+    public class TestScenePresentScore : OsuGameTestScene
+    {
+        private BeatmapSetInfo beatmap;
+
+        [SetUpSteps]
+        public new void SetUpSteps()
+        {
+            AddStep("import beatmap", () =>
+            {
+                var difficulty = new BeatmapDifficulty();
+                var metadata = new BeatmapMetadata
+                {
+                    Artist = "SomeArtist",
+                    AuthorString = "SomeAuthor",
+                    Title = "import"
+                };
+
+                beatmap = Game.BeatmapManager.Import(new BeatmapSetInfo
+                {
+                    Hash = Guid.NewGuid().ToString(),
+                    OnlineBeatmapSetID = 1,
+                    Metadata = metadata,
+                    Beatmaps = new List<BeatmapInfo>
+                    {
+                        new BeatmapInfo
+                        {
+                            OnlineBeatmapID = 1 * 1024,
+                            Metadata = metadata,
+                            BaseDifficulty = difficulty,
+                            Ruleset = new OsuRuleset().RulesetInfo
+                        },
+                        new BeatmapInfo
+                        {
+                            OnlineBeatmapID = 1 * 2048,
+                            Metadata = metadata,
+                            BaseDifficulty = difficulty,
+                            Ruleset = new OsuRuleset().RulesetInfo
+                        },
+                    }
+                }).Result;
+            });
+        }
+
+        [Test]
+        public void TestFromMainMenu([Values] ScorePresentType type)
+        {
+            var firstImport = importScore(1);
+            var secondimport = importScore(3);
+
+            presentAndConfirm(firstImport, type);
+            returnToMenu();
+            presentAndConfirm(secondimport, type);
+            returnToMenu();
+            returnToMenu();
+        }
+
+        [Test]
+        public void TestFromMainMenuDifferentRuleset([Values] ScorePresentType type)
+        {
+            var firstImport = importScore(1);
+            var secondimport = importScore(3, new ManiaRuleset().RulesetInfo);
+
+            presentAndConfirm(firstImport, type);
+            returnToMenu();
+            presentAndConfirm(secondimport, type);
+            returnToMenu();
+            returnToMenu();
+        }
+
+        [Test]
+        public void TestFromSongSelect([Values] ScorePresentType type)
+        {
+            var firstImport = importScore(1);
+            presentAndConfirm(firstImport, type);
+
+            var secondimport = importScore(3);
+            presentAndConfirm(secondimport, type);
+        }
+
+        [Test]
+        public void TestFromSongSelectDifferentRuleset([Values] ScorePresentType type)
+        {
+            var firstImport = importScore(1);
+            presentAndConfirm(firstImport, type);
+
+            var secondimport = importScore(3, new ManiaRuleset().RulesetInfo);
+            presentAndConfirm(secondimport, type);
+        }
+
+        private void returnToMenu()
+        {
+            AddStep("return to menu", () => Game.ScreenStack.CurrentScreen.Exit());
+            AddUntilStep("wait for menu", () => Game.ScreenStack.CurrentScreen is MainMenu);
+        }
+
+        private Func<ScoreInfo> importScore(int i, RulesetInfo ruleset = null)
+        {
+            ScoreInfo imported = null;
+            AddStep($"import score {i}", () =>
+            {
+                imported = Game.ScoreManager.Import(new ScoreInfo
+                {
+                    Hash = Guid.NewGuid().ToString(),
+                    OnlineScoreID = i,
+                    Beatmap = beatmap.Beatmaps.First(),
+                    Ruleset = ruleset ?? new OsuRuleset().RulesetInfo
+                }).Result;
+            });
+
+            AddAssert($"import {i} succeeded", () => imported != null);
+
+            return () => imported;
+        }
+
+        private void presentAndConfirm(Func<ScoreInfo> getImport, ScorePresentType type)
+        {
+            AddStep("present score", () => Game.PresentScore(getImport(), type));
+
+            switch (type)
+            {
+                case ScorePresentType.Results:
+                    AddUntilStep("wait for results", () => Game.ScreenStack.CurrentScreen is ResultsScreen);
+                    AddUntilStep("correct score displayed", () => ((ResultsScreen)Game.ScreenStack.CurrentScreen).Score.ID == getImport().ID);
+                    AddAssert("correct ruleset selected", () => Game.Ruleset.Value.ID == getImport().Ruleset.ID);
+                    break;
+
+                case ScorePresentType.Gameplay:
+                    AddUntilStep("wait for player loader", () => Game.ScreenStack.CurrentScreen is ReplayPlayerLoader);
+                    AddUntilStep("correct score displayed", () => ((ReplayPlayerLoader)Game.ScreenStack.CurrentScreen).Score.ID == getImport().ID);
+                    AddAssert("correct ruleset selected", () => Game.Ruleset.Value.ID == getImport().Ruleset.ID);
+                    break;
+            }
+        }
+    }
+}

osu.Game.Tests/Visual/Online/TestSceneChatOverlay.cs

@@ -246,7 +246,12 @@ namespace osu.Game.Tests.Visual.Online
             {
                 ((BindableList<Channel>)ChannelManager.AvailableChannels).AddRange(channels);
 
-                Child = ChatOverlay = new TestChatOverlay { RelativeSizeAxes = Axes.Both, };
+                InternalChildren = new Drawable[]
+                {
+                    ChannelManager,
+                    ChatOverlay = new TestChatOverlay { RelativeSizeAxes = Axes.Both, },
+                };
+
                 ChatOverlay.Show();
             }
         }

osu.Game.Tests/Visual/Online/TestSceneCommentsContainer.cs

@@ -1,52 +1,128 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using NUnit.Framework;
-using osu.Game.Online.API.Requests;
-using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics;
-using osu.Game.Overlays.Comments;
 using osu.Game.Overlays;
 using osu.Framework.Allocation;
-using osu.Framework.Bindables;
-using osu.Game.Users;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Overlays.Comments;
 
 namespace osu.Game.Tests.Visual.Online
 {
     [TestFixture]
     public class TestSceneCommentsContainer : OsuTestScene
     {
-        protected override bool UseOnlineAPI => true;
-
         [Cached]
         private readonly OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Purple);
 
-        public TestSceneCommentsContainer()
-        {
-            BasicScrollContainer scroll;
-            TestCommentsContainer comments;
+        private DummyAPIAccess dummyAPI => (DummyAPIAccess)API;
 
-            Add(scroll = new BasicScrollContainer
+        private CommentsContainer commentsContainer;
+
+        [SetUp]
+        public void SetUp() => Schedule(() =>
+            Child = new BasicScrollContainer
             {
                 RelativeSizeAxes = Axes.Both,
-                Child = comments = new TestCommentsContainer()
+                Child = commentsContainer = new CommentsContainer()
             });
 
-            AddStep("Big Black comments", () => comments.ShowComments(CommentableType.Beatmapset, 41823));
-            AddStep("Airman comments", () => comments.ShowComments(CommentableType.Beatmapset, 24313));
-            AddStep("Lazer build comments", () => comments.ShowComments(CommentableType.Build, 4772));
-            AddStep("News comments", () => comments.ShowComments(CommentableType.NewsPost, 715));
-            AddStep("Trigger user change", comments.User.TriggerChange);
-            AddStep("Idle state", () =>
-            {
-                scroll.Clear();
-                scroll.Add(comments = new TestCommentsContainer());
-            });
-        }
-
-        private class TestCommentsContainer : CommentsContainer
+        [Test]
+        public void TestIdleState()
         {
-            public new Bindable<User> User => base.User;
+            AddUntilStep("loading spinner shown",
+                () => commentsContainer.ChildrenOfType<CommentsShowMoreButton>().Single().IsLoading);
         }
+
+        [Test]
+        public void TestSingleCommentsPage()
+        {
+            setUpCommentsResponse(exampleComments);
+            AddStep("show comments", () => commentsContainer.ShowComments(CommentableType.Beatmapset, 123));
+            AddUntilStep("show more button hidden",
+                () => commentsContainer.ChildrenOfType<CommentsShowMoreButton>().Single().Alpha == 0);
+        }
+
+        [Test]
+        public void TestMultipleCommentPages()
+        {
+            var comments = exampleComments;
+            comments.HasMore = true;
+            comments.TopLevelCount = 10;
+
+            setUpCommentsResponse(comments);
+            AddStep("show comments", () => commentsContainer.ShowComments(CommentableType.Beatmapset, 123));
+            AddUntilStep("show more button visible",
+                () => commentsContainer.ChildrenOfType<CommentsShowMoreButton>().Single().Alpha == 1);
+        }
+
+        [Test]
+        public void TestMultipleLoads()
+        {
+            var comments = exampleComments;
+            int topLevelCommentCount = exampleComments.Comments.Count(comment => comment.IsTopLevel);
+
+            AddStep("hide container", () => commentsContainer.Hide());
+            setUpCommentsResponse(comments);
+            AddRepeatStep("show comments multiple times",
+                () => commentsContainer.ShowComments(CommentableType.Beatmapset, 456), 2);
+            AddStep("show container", () => commentsContainer.Show());
+            AddUntilStep("comment count is correct",
+                () => commentsContainer.ChildrenOfType<DrawableComment>().Count() == topLevelCommentCount);
+        }
+
+        private void setUpCommentsResponse(CommentBundle commentBundle)
+            => AddStep("set up response", () =>
+            {
+                dummyAPI.HandleRequest = request =>
+                {
+                    if (!(request is GetCommentsRequest getCommentsRequest))
+                        return;
+
+                    getCommentsRequest.TriggerSuccess(commentBundle);
+                };
+            });
+
+        private CommentBundle exampleComments => new CommentBundle
+        {
+            Comments = new List<Comment>
+            {
+                new Comment
+                {
+                    Id = 1,
+                    Message = "This is a comment",
+                    LegacyName = "FirstUser",
+                    CreatedAt = DateTimeOffset.Now,
+                    VotesCount = 19,
+                    RepliesCount = 1
+                },
+                new Comment
+                {
+                    Id = 5,
+                    ParentId = 1,
+                    Message = "This is a child comment",
+                    LegacyName = "SecondUser",
+                    CreatedAt = DateTimeOffset.Now,
+                    VotesCount = 4,
+                },
+                new Comment
+                {
+                    Id = 10,
+                    Message = "This is another comment",
+                    LegacyName = "ThirdUser",
+                    CreatedAt = DateTimeOffset.Now,
+                    VotesCount = 0
+                },
+            },
+            IncludedComments = new List<Comment>(),
+        };
     }
 }

osu.Game.Tests/Visual/Ranking/TestSceneExpandedPanelMiddleContent.cs

@@ -4,7 +4,6 @@
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
-using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -33,7 +32,10 @@ namespace osu.Game.Tests.Visual.Ranking
         {
             var author = new User { Username = "mapper_name" };
 
-            AddStep("show example score", () => showPanel(createTestBeatmap(author), new TestScoreInfo(new OsuRuleset().RulesetInfo)));
+            AddStep("show example score", () => showPanel(new TestScoreInfo(new OsuRuleset().RulesetInfo)
+            {
+                Beatmap = createTestBeatmap(author)
+            }));
 
             AddAssert("mapper name present", () => this.ChildrenOfType<OsuSpriteText>().Any(spriteText => spriteText.Text == "mapper_name"));
         }
@@ -41,38 +43,34 @@ namespace osu.Game.Tests.Visual.Ranking
         [Test]
         public void TestMapWithUnknownMapper()
         {
-            AddStep("show example score", () => showPanel(createTestBeatmap(null), new TestScoreInfo(new OsuRuleset().RulesetInfo)));
+            AddStep("show example score", () => showPanel(new TestScoreInfo(new OsuRuleset().RulesetInfo)
+            {
+                Beatmap = createTestBeatmap(null)
+            }));
 
             AddAssert("mapped by text not present", () =>
                 this.ChildrenOfType<OsuSpriteText>().All(spriteText => !containsAny(spriteText.Text, "mapped", "by")));
         }
 
-        private void showPanel(WorkingBeatmap workingBeatmap, ScoreInfo score)
-        {
-            Child = new ExpandedPanelMiddleContentContainer(workingBeatmap, score);
-        }
+        private void showPanel(ScoreInfo score) => Child = new ExpandedPanelMiddleContentContainer(score);
 
-        private WorkingBeatmap createTestBeatmap(User author)
+        private BeatmapInfo createTestBeatmap(User author)
         {
-            var beatmap = new TestBeatmap(rulesetStore.GetRuleset(0));
+            var beatmap = new TestBeatmap(rulesetStore.GetRuleset(0)).BeatmapInfo;
+
             beatmap.Metadata.Author = author;
             beatmap.Metadata.Title = "Verrrrrrrrrrrrrrrrrrry looooooooooooooooooooooooong beatmap title";
             beatmap.Metadata.Artist = "Verrrrrrrrrrrrrrrrrrry looooooooooooooooooooooooong beatmap artist";
 
-            return new TestWorkingBeatmap(beatmap);
+            return beatmap;
         }
 
         private bool containsAny(string text, params string[] stringsToMatch) => stringsToMatch.Any(text.Contains);
 
         private class ExpandedPanelMiddleContentContainer : Container
         {
-            [Cached]
-            private Bindable<WorkingBeatmap> workingBeatmap { get; set; }
-
-            public ExpandedPanelMiddleContentContainer(WorkingBeatmap beatmap, ScoreInfo score)
+            public ExpandedPanelMiddleContentContainer(ScoreInfo score)
             {
-                workingBeatmap = new Bindable<WorkingBeatmap>(beatmap);
-
                 Anchor = Anchor.Centre;
                 Origin = Anchor.Centre;
                 Size = new Vector2(ScorePanel.EXPANDED_WIDTH, 700);

osu.Game.Tests/Visual/Ranking/TestSceneResultsScreen.cs

@@ -36,12 +36,14 @@ namespace osu.Game.Tests.Visual.Ranking
                 Beatmap.Value = beatmaps.GetWorkingBeatmap(beatmapInfo);
         }
 
-        private TestSoloResults createResultsScreen() => new TestSoloResults(new TestScoreInfo(new OsuRuleset().RulesetInfo));
+        private TestResultsScreen createResultsScreen() => new TestResultsScreen(new TestScoreInfo(new OsuRuleset().RulesetInfo));
+
+        private UnrankedSoloResultsScreen createUnrankedSoloResultsScreen() => new UnrankedSoloResultsScreen(new TestScoreInfo(new OsuRuleset().RulesetInfo));
 
         [Test]
         public void ResultsWithoutPlayer()
         {
-            TestSoloResults screen = null;
+            TestResultsScreen screen = null;
             OsuScreenStack stack;
 
             AddStep("load results", () =>
@@ -60,13 +62,23 @@ namespace osu.Game.Tests.Visual.Ranking
         [Test]
         public void ResultsWithPlayer()
         {
-            TestSoloResults screen = null;
+            TestResultsScreen screen = null;
 
             AddStep("load results", () => Child = new TestResultsContainer(screen = createResultsScreen()));
             AddUntilStep("wait for loaded", () => screen.IsLoaded);
             AddAssert("retry overlay present", () => screen.RetryOverlay != null);
         }
 
+        [Test]
+        public void ResultsForUnranked()
+        {
+            UnrankedSoloResultsScreen screen = null;
+
+            AddStep("load results", () => Child = new TestResultsContainer(screen = createUnrankedSoloResultsScreen()));
+            AddUntilStep("wait for loaded", () => screen.IsLoaded);
+            AddAssert("retry overlay present", () => screen.RetryOverlay != null);
+        }
+
         private class TestResultsContainer : Container
         {
             [Cached(typeof(Player))]
@@ -86,11 +98,11 @@ namespace osu.Game.Tests.Visual.Ranking
             }
         }
 
-        private class TestSoloResults : ResultsScreen
+        private class TestResultsScreen : ResultsScreen
         {
             public HotkeyRetryOverlay RetryOverlay;
 
-            public TestSoloResults(ScoreInfo score)
+            public TestResultsScreen(ScoreInfo score)
                 : base(score)
             {
             }
@@ -102,5 +114,24 @@ namespace osu.Game.Tests.Visual.Ranking
                 RetryOverlay = InternalChildren.OfType<HotkeyRetryOverlay>().SingleOrDefault();
             }
         }
+
+        private class UnrankedSoloResultsScreen : SoloResultsScreen
+        {
+            public HotkeyRetryOverlay RetryOverlay;
+
+            public UnrankedSoloResultsScreen(ScoreInfo score)
+                : base(score)
+            {
+                Score.Beatmap.OnlineBeatmapID = 0;
+                Score.Beatmap.Status = BeatmapSetOnlineStatus.Pending;
+            }
+
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                RetryOverlay = InternalChildren.OfType<HotkeyRetryOverlay>().SingleOrDefault();
+            }
+        }
     }
 }

osu.Game.Tests/Visual/Settings/TestSceneKeyBindingPanel.cs

@@ -1,13 +1,19 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Diagnostics;
+using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Framework.Threading;
 using osu.Game.Overlays;
+using osu.Game.Overlays.KeyBinding;
+using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Settings
 {
     [TestFixture]
-    public class TestSceneKeyBindingPanel : OsuTestScene
+    public class TestSceneKeyBindingPanel : OsuManualInputManagerTestScene
     {
         private readonly KeyBindingPanel panel;
 
@@ -21,5 +27,42 @@ namespace osu.Game.Tests.Visual.Settings
             base.LoadComplete();
             panel.Show();
         }
+
+        [Test]
+        public void TestClickTwiceOnClearButton()
+        {
+            KeyBindingRow firstRow = null;
+
+            AddStep("click first row", () =>
+            {
+                firstRow = panel.ChildrenOfType<KeyBindingRow>().First();
+                InputManager.MoveMouseTo(firstRow);
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddStep("schedule button clicks", () =>
+            {
+                var clearButton = firstRow.ChildrenOfType<KeyBindingRow.ClearButton>().Single();
+
+                InputManager.MoveMouseTo(clearButton);
+
+                int buttonClicks = 0;
+                ScheduledDelegate clickDelegate = null;
+
+                clickDelegate = Scheduler.AddDelayed(() =>
+                {
+                    InputManager.PressButton(MouseButton.Left);
+                    InputManager.ReleaseButton(MouseButton.Left);
+
+                    if (++buttonClicks == 2)
+                    {
+                        // ReSharper disable once AccessToModifiedClosure
+                        Debug.Assert(clickDelegate != null);
+                        // ReSharper disable once AccessToModifiedClosure
+                        clickDelegate.Cancel();
+                    }
+                }, 0, true);
+            });
+        }
     }
 }

osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs

@@ -38,13 +38,9 @@ namespace osu.Game.Tests.Visual.SongSelect
     public class TestScenePlaySongSelect : ScreenTestScene
     {
         private BeatmapManager manager;
-
         private RulesetStore rulesets;
-
         private MusicController music;
-
         private WorkingBeatmap defaultBeatmap;
-
         private TestSongSelect songSelect;
 
         [BackgroundDependencyLoader]
@@ -308,15 +304,13 @@ namespace osu.Game.Tests.Visual.SongSelect
 
             AddAssert("random map selected", () => songSelect.CurrentBeatmap != defaultBeatmap);
 
-            var sortMode = config.GetBindable<SortMode>(OsuSetting.SongSelectSortingMode);
-
-            AddStep(@"Sort by Artist", delegate { sortMode.Value = SortMode.Artist; });
-            AddStep(@"Sort by Title", delegate { sortMode.Value = SortMode.Title; });
-            AddStep(@"Sort by Author", delegate { sortMode.Value = SortMode.Author; });
-            AddStep(@"Sort by DateAdded", delegate { sortMode.Value = SortMode.DateAdded; });
-            AddStep(@"Sort by BPM", delegate { sortMode.Value = SortMode.BPM; });
-            AddStep(@"Sort by Length", delegate { sortMode.Value = SortMode.Length; });
-            AddStep(@"Sort by Difficulty", delegate { sortMode.Value = SortMode.Difficulty; });
+            AddStep(@"Sort by Artist", () => config.Set(OsuSetting.SongSelectSortingMode, SortMode.Artist));
+            AddStep(@"Sort by Title", () => config.Set(OsuSetting.SongSelectSortingMode, SortMode.Title));
+            AddStep(@"Sort by Author", () => config.Set(OsuSetting.SongSelectSortingMode, SortMode.Author));
+            AddStep(@"Sort by DateAdded", () => config.Set(OsuSetting.SongSelectSortingMode, SortMode.DateAdded));
+            AddStep(@"Sort by BPM", () => config.Set(OsuSetting.SongSelectSortingMode, SortMode.BPM));
+            AddStep(@"Sort by Length", () => config.Set(OsuSetting.SongSelectSortingMode, SortMode.Length));
+            AddStep(@"Sort by Difficulty", () => config.Set(OsuSetting.SongSelectSortingMode, SortMode.Difficulty));
         }
 
         [Test]

osu.Game.Tests/Visual/UserInterface/TestSceneOsuIcon.cs

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Diagnostics;
 using System.Reflection;
 using NUnit.Framework;
 using osu.Framework.Extensions.IEnumerableExtensions;
@@ -45,7 +46,12 @@ namespace osu.Game.Tests.Visual.UserInterface
             });
 
             foreach (var p in typeof(OsuIcon).GetProperties(BindingFlags.Public | BindingFlags.Static))
-                flow.Add(new Icon($"{nameof(OsuIcon)}.{p.Name}", (IconUsage)p.GetValue(null)));
+            {
+                var propValue = p.GetValue(null);
+                Debug.Assert(propValue != null);
+
+                flow.Add(new Icon($"{nameof(OsuIcon)}.{p.Name}", (IconUsage)propValue));
+            }
 
             AddStep("toggle shadows", () => flow.Children.ForEach(i => i.SpriteIcon.Shadow = !i.SpriteIcon.Shadow));
             AddStep("change icons", () => flow.Children.ForEach(i => i.SpriteIcon.Icon = new IconUsage((char)(i.SpriteIcon.Icon.Icon + 1))));

osu.Game.Tournament.Tests/LadderTestScene.cs

@@ -24,8 +24,7 @@ namespace osu.Game.Tournament.Tests
         [BackgroundDependencyLoader]
         private void load()
         {
-            if (Ladder.Ruleset.Value == null)
-                Ladder.Ruleset.Value = rulesetStore.AvailableRulesets.First();
+            Ladder.Ruleset.Value ??= rulesetStore.AvailableRulesets.First();
 
             Ruleset.BindTo(Ladder.Ruleset);
         }

osu.Game.Tournament/Components/SongBar.cs

@@ -77,6 +77,8 @@ namespace osu.Game.Tournament.Components
                 flow = new FillFlowContainer
                 {
                     RelativeSizeAxes = Axes.X,
+                    // Todo: This is a hack for https://github.com/ppy/osu-framework/issues/3617 since this container is at the very edge of the screen and potentially initially masked away.
+                    Height = 1,
                     AutoSizeAxes = Axes.Y,
                     LayoutDuration = 500,
                     LayoutEasing = Easing.OutQuint,

osu.Game.Tournament/IPC/FileBasedIPC.cs

@@ -34,6 +34,7 @@ namespace osu.Game.Tournament.IPC
 
         private int lastBeatmapId;
         private ScheduledDelegate scheduled;
+        private GetBeatmapRequest beatmapLookupRequest;
 
         public Storage Storage { get; private set; }
 
@@ -77,6 +78,8 @@ namespace osu.Game.Tournament.IPC
 
                                 if (lastBeatmapId != beatmapId)
                                 {
+                                    beatmapLookupRequest?.Cancel();
+
                                     lastBeatmapId = beatmapId;
 
                                     var existing = ladder.CurrentMatch.Value?.Round.Value?.Beatmaps.FirstOrDefault(b => b.ID == beatmapId && b.BeatmapInfo != null);
@@ -85,9 +88,9 @@ namespace osu.Game.Tournament.IPC
                                         Beatmap.Value = existing.BeatmapInfo;
                                     else
                                     {
-                                        var req = new GetBeatmapRequest(new BeatmapInfo { OnlineBeatmapID = beatmapId });
-                                        req.Success += b => Beatmap.Value = b.ToBeatmap(Rulesets);
-                                        API.Queue(req);
+                                        beatmapLookupRequest = new GetBeatmapRequest(new BeatmapInfo { OnlineBeatmapID = beatmapId });
+                                        beatmapLookupRequest.Success += b => Beatmap.Value = b.ToBeatmap(Rulesets);
+                                        API.Queue(beatmapLookupRequest);
                                     }
                                 }
 

osu.Game.Tournament/Screens/Drawings/DrawingsScreen.cs

@@ -47,8 +47,7 @@ namespace osu.Game.Tournament.Screens.Drawings
 
             this.storage = storage;
 
-            if (TeamList == null)
-                TeamList = new StorageBackedTeamList(storage);
+            TeamList ??= new StorageBackedTeamList(storage);
 
             if (!TeamList.Teams.Any())
             {

osu.Game.Tournament/Screens/Gameplay/Components/TeamDisplay.cs

@@ -14,7 +14,10 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
     {
         private readonly TeamScore score;
 
-        public bool ShowScore { set => score.FadeTo(value ? 1 : 0, 200); }
+        public bool ShowScore
+        {
+            set => score.FadeTo(value ? 1 : 0, 200);
+        }
 
         public TeamDisplay(TournamentTeam team, TeamColour colour, Bindable<int?> currentTeamScore, int pointsToWin)
             : base(team)

osu.Game.Tournament/Screens/Gameplay/Components/TeamScoreDisplay.cs

@@ -21,7 +21,10 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
 
         private TeamDisplay teamDisplay;
 
-        public bool ShowScore { set => teamDisplay.ShowScore = value; }
+        public bool ShowScore
+        {
+            set => teamDisplay.ShowScore = value;
+        }
 
         public TeamScoreDisplay(TeamColour teamColour)
         {

osu.Game.Tournament/TournamentGame.cs

@@ -1,11 +1,19 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Drawing;
 using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Configuration;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.Colour;
 using osu.Game.Graphics.Cursor;
 using osu.Game.Tournament.Models;
+using osu.Game.Graphics;
+using osuTK;
 using osuTK.Graphics;
 
 namespace osu.Game.Tournament
@@ -21,19 +29,87 @@ namespace osu.Game.Tournament
         public static readonly Color4 ELEMENT_FOREGROUND_COLOUR = Color4Extensions.FromHex("#000");
 
         public static readonly Color4 TEXT_COLOUR = Color4Extensions.FromHex("#fff");
+        private Drawable heightWarning;
+        private Bindable<Size> windowSize;
 
-        protected override void LoadComplete()
+        [BackgroundDependencyLoader]
+        private void load(FrameworkConfigManager frameworkConfig)
         {
-            base.LoadComplete();
-
-            Add(new OsuContextMenuContainer
+            windowSize = frameworkConfig.GetBindable<Size>(FrameworkSetting.WindowedSize);
+            windowSize.BindValueChanged(size => ScheduleAfterChildren(() =>
             {
-                RelativeSizeAxes = Axes.Both,
-                Child = new TournamentSceneManager()
-            });
+                var minWidth = (int)(size.NewValue.Height / 768f * TournamentSceneManager.REQUIRED_WIDTH) - 1;
 
-            // we don't want to show the menu cursor as it would appear on stream output.
-            MenuCursorContainer.Cursor.Alpha = 0;
+                heightWarning.Alpha = size.NewValue.Width < minWidth ? 1 : 0;
+            }), true);
+
+            AddRange(new[]
+            {
+                new Container
+                {
+                    CornerRadius = 10,
+                    Depth = float.MinValue,
+                    Position = new Vector2(5),
+                    Masking = true,
+                    AutoSizeAxes = Axes.Both,
+                    Anchor = Anchor.BottomRight,
+                    Origin = Anchor.BottomRight,
+                    Children = new Drawable[]
+                    {
+                        new Box
+                        {
+                            Colour = OsuColour.Gray(0.2f),
+                            RelativeSizeAxes = Axes.Both,
+                        },
+                        new TourneyButton
+                        {
+                            Text = "Save Changes",
+                            Width = 140,
+                            Height = 50,
+                            Padding = new MarginPadding
+                            {
+                                Top = 10,
+                                Left = 10,
+                            },
+                            Margin = new MarginPadding
+                            {
+                                Right = 10,
+                                Bottom = 10,
+                            },
+                            Action = SaveChanges,
+                        },
+                    }
+                },
+                heightWarning = new Container
+                {
+                    Masking = true,
+                    CornerRadius = 5,
+                    Depth = float.MinValue,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    AutoSizeAxes = Axes.Both,
+                    Children = new Drawable[]
+                    {
+                        new Box
+                        {
+                            Colour = Color4.Red,
+                            RelativeSizeAxes = Axes.Both,
+                        },
+                        new TournamentSpriteText
+                        {
+                            Text = "Please make the window wider",
+                            Font = OsuFont.Torus.With(weight: FontWeight.Bold),
+                            Colour = Color4.White,
+                            Padding = new MarginPadding(20)
+                        }
+                    }
+                },
+                new OsuContextMenuContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Child = new TournamentSceneManager()
+                }
+            });
         }
     }
 }

osu.Game.Tournament/TournamentGameBase.cs

@@ -2,34 +2,25 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using System.Drawing;
 using System.IO;
 using System.Linq;
 using Newtonsoft.Json;
 using osu.Framework.Allocation;
-using osu.Framework.Bindables;
-using osu.Framework.Configuration;
-using osu.Framework.Graphics;
-using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.Textures;
 using osu.Framework.Input;
 using osu.Framework.IO.Stores;
 using osu.Framework.Platform;
 using osu.Game.Beatmaps;
-using osu.Game.Graphics;
 using osu.Game.Online.API.Requests;
 using osu.Game.Tournament.IPC;
 using osu.Game.Tournament.Models;
 using osu.Game.Users;
-using osuTK;
-using osuTK.Graphics;
 using osuTK.Input;
 
 namespace osu.Game.Tournament
 {
     [Cached(typeof(TournamentGameBase))]
-    public abstract class TournamentGameBase : OsuGameBase
+    public class TournamentGameBase : OsuGameBase
     {
         private const string bracket_filename = "bracket.json";
 
@@ -40,19 +31,15 @@ namespace osu.Game.Tournament
         private TournamentStorage tournamentStorage;
 
         private DependencyContainer dependencies;
-
-        private Bindable<Size> windowSize;
         private FileBasedIPC ipc;
 
-        private Drawable heightWarning;
-
         protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
         {
             return dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
         }
 
         [BackgroundDependencyLoader]
-        private void load(Storage storage, FrameworkConfigManager frameworkConfig)
+        private void load(Storage storage)
         {
             Resources.AddStore(new DllResourceStore(typeof(TournamentGameBase).Assembly));
 
@@ -62,83 +49,12 @@ namespace osu.Game.Tournament
 
             this.storage = storage;
 
-            windowSize = frameworkConfig.GetBindable<Size>(FrameworkSetting.WindowedSize);
-            windowSize.BindValueChanged(size => ScheduleAfterChildren(() =>
-            {
-                var minWidth = (int)(size.NewValue.Height / 768f * TournamentSceneManager.REQUIRED_WIDTH) - 1;
-
-                heightWarning.Alpha = size.NewValue.Width < minWidth ? 1 : 0;
-            }), true);
-
             readBracket();
 
             ladder.CurrentMatch.Value = ladder.Matches.FirstOrDefault(p => p.Current.Value);
 
             dependencies.CacheAs<MatchIPCInfo>(ipc = new FileBasedIPC());
             Add(ipc);
-
-            AddRange(new[]
-            {
-                new Container
-                {
-                    CornerRadius = 10,
-                    Depth = float.MinValue,
-                    Position = new Vector2(5),
-                    Masking = true,
-                    AutoSizeAxes = Axes.Both,
-                    Anchor = Anchor.BottomRight,
-                    Origin = Anchor.BottomRight,
-                    Children = new Drawable[]
-                    {
-                        new Box
-                        {
-                            Colour = OsuColour.Gray(0.2f),
-                            RelativeSizeAxes = Axes.Both,
-                        },
-                        new TourneyButton
-                        {
-                            Text = "Save Changes",
-                            Width = 140,
-                            Height = 50,
-                            Padding = new MarginPadding
-                            {
-                                Top = 10,
-                                Left = 10,
-                            },
-                            Margin = new MarginPadding
-                            {
-                                Right = 10,
-                                Bottom = 10,
-                            },
-                            Action = SaveChanges,
-                        },
-                    }
-                },
-                heightWarning = new Container
-                {
-                    Masking = true,
-                    CornerRadius = 5,
-                    Depth = float.MinValue,
-                    Anchor = Anchor.Centre,
-                    Origin = Anchor.Centre,
-                    AutoSizeAxes = Axes.Both,
-                    Children = new Drawable[]
-                    {
-                        new Box
-                        {
-                            Colour = Color4.Red,
-                            RelativeSizeAxes = Axes.Both,
-                        },
-                        new TournamentSpriteText
-                        {
-                            Text = "Please make the window wider",
-                            Font = OsuFont.Torus.With(weight: FontWeight.Bold),
-                            Colour = Color4.White,
-                            Padding = new MarginPadding(20)
-                        }
-                    }
-                },
-            });
         }
 
         private void readBracket()
@@ -150,11 +66,8 @@ namespace osu.Game.Tournament
                     ladder = JsonConvert.DeserializeObject<LadderInfo>(sr.ReadToEnd());
             }
 
-            if (ladder == null)
-                ladder = new LadderInfo();
-
-            if (ladder.Ruleset.Value == null)
-                ladder.Ruleset.Value = RulesetStore.AvailableRulesets.First();
+            ladder ??= new LadderInfo();
+            ladder.Ruleset.Value ??= RulesetStore.AvailableRulesets.First();
 
             Ruleset.BindTo(ladder.Ruleset);
 
@@ -316,6 +229,8 @@ namespace osu.Game.Tournament
         protected override void LoadComplete()
         {
             MenuCursorContainer.Cursor.AlwaysPresent = true; // required for tooltip display
+
+            // we don't want to show the menu cursor as it would appear on stream output.
             MenuCursorContainer.Cursor.Alpha = 0;
 
             base.LoadComplete();

osu.Game/Beatmaps/BeatmapManager.cs

@@ -79,6 +79,8 @@ namespace osu.Game.Beatmaps
             beatmaps = (BeatmapStore)ModelStore;
             beatmaps.BeatmapHidden += b => beatmapHidden.Value = new WeakReference<BeatmapInfo>(b);
             beatmaps.BeatmapRestored += b => beatmapRestored.Value = new WeakReference<BeatmapInfo>(b);
+            beatmaps.ItemRemoved += removeWorkingCache;
+            beatmaps.ItemUpdated += removeWorkingCache;
 
             onlineLookupQueue = new BeatmapOnlineLookupQueue(api, storage);
         }
@@ -203,12 +205,17 @@ namespace osu.Game.Beatmaps
 
                 stream.Seek(0, SeekOrigin.Begin);
 
-                UpdateFile(setInfo, setInfo.Files.Single(f => string.Equals(f.Filename, info.Path, StringComparison.OrdinalIgnoreCase)), stream);
+                using (ContextFactory.GetForWrite())
+                {
+                    var beatmapInfo = setInfo.Beatmaps.Single(b => b.ID == info.ID);
+                    beatmapInfo.MD5Hash = stream.ComputeMD5Hash();
+
+                    stream.Seek(0, SeekOrigin.Begin);
+                    UpdateFile(setInfo, setInfo.Files.Single(f => string.Equals(f.Filename, info.Path, StringComparison.OrdinalIgnoreCase)), stream);
+                }
             }
 
-            var working = workingCache.FirstOrDefault(w => w.BeatmapInfo?.ID == info.ID);
-            if (working != null)
-                workingCache.Remove(working);
+            removeWorkingCache(info);
         }
 
         private readonly WeakList<WorkingBeatmap> workingCache = new WeakList<WorkingBeatmap>();
@@ -239,8 +246,7 @@ namespace osu.Game.Beatmaps
 
                 if (working == null)
                 {
-                    if (beatmapInfo.Metadata == null)
-                        beatmapInfo.Metadata = beatmapInfo.BeatmapSet.Metadata;
+                    beatmapInfo.Metadata ??= beatmapInfo.BeatmapSet.Metadata;
 
                     workingCache.Add(working = new BeatmapManagerWorkingBeatmap(Files.Store,
                         new LargeTextureStore(host?.CreateTextureLoaderStore(Files.Store)), beatmapInfo, audioManager));
@@ -258,9 +264,9 @@ namespace osu.Game.Beatmaps
         /// <returns>The first result for the provided query, or null if no results were found.</returns>
         public BeatmapSetInfo QueryBeatmapSet(Expression<Func<BeatmapSetInfo, bool>> query) => beatmaps.ConsumableItems.AsNoTracking().FirstOrDefault(query);
 
-        protected override bool CanUndelete(BeatmapSetInfo existing, BeatmapSetInfo import)
+        protected override bool CanReuseExisting(BeatmapSetInfo existing, BeatmapSetInfo import)
         {
-            if (!base.CanUndelete(existing, import))
+            if (!base.CanReuseExisting(existing, import))
                 return false;
 
             var existingIds = existing.Beatmaps.Select(b => b.OnlineBeatmapID).OrderBy(i => i);
@@ -410,6 +416,24 @@ namespace osu.Game.Beatmaps
             return endTime - startTime;
         }
 
+        private void removeWorkingCache(BeatmapSetInfo info)
+        {
+            if (info.Beatmaps == null) return;
+
+            foreach (var b in info.Beatmaps)
+                removeWorkingCache(b);
+        }
+
+        private void removeWorkingCache(BeatmapInfo info)
+        {
+            lock (workingCache)
+            {
+                var working = workingCache.FirstOrDefault(w => w.BeatmapInfo?.ID == info.ID);
+                if (working != null)
+                    workingCache.Remove(working);
+            }
+        }
+
         public void Dispose()
         {
             onlineLookupQueue?.Dispose();

osu.Game/Beatmaps/BeatmapManager_WorkingBeatmap.cs

@@ -42,7 +42,7 @@ namespace osu.Game.Beatmaps
                 }
             }
 
-            private string getPathForFile(string filename) => BeatmapSetInfo.Files.FirstOrDefault(f => string.Equals(f.Filename, filename, StringComparison.OrdinalIgnoreCase))?.FileInfo.StoragePath;
+            private string getPathForFile(string filename) => BeatmapSetInfo.Files.SingleOrDefault(f => string.Equals(f.Filename, filename, StringComparison.OrdinalIgnoreCase))?.FileInfo.StoragePath;
 
             private TextureStore textureStore;
 

osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs

@@ -425,8 +425,7 @@ namespace osu.Game.Beatmaps.Formats
         private void handleHitObject(string line)
         {
             // If the ruleset wasn't specified, assume the osu!standard ruleset.
-            if (parser == null)
-                parser = new Rulesets.Objects.Legacy.Osu.ConvertHitObjectParser(getOffsetTime(), FormatVersion);
+            parser ??= new Rulesets.Objects.Legacy.Osu.ConvertHitObjectParser(getOffsetTime(), FormatVersion);
 
             var obj = parser.Parse(line);
             if (obj != null)

osu.Game/Database/ArchiveModelManager.cs

@@ -276,7 +276,7 @@ namespace osu.Game.Database
             // for now, concatenate all .osu files in the set to create a unique hash.
             MemoryStream hashable = new MemoryStream();
 
-            foreach (TFileModel file in item.Files.Where(f => HashableFileTypes.Any(f.Filename.EndsWith)))
+            foreach (TFileModel file in item.Files.Where(f => HashableFileTypes.Any(f.Filename.EndsWith)).OrderBy(f => f.Filename))
             {
                 using (Stream s = Files.Store.GetStream(file.FileInfo.StoragePath))
                     s.CopyTo(hashable);
@@ -332,7 +332,7 @@ namespace osu.Game.Database
 
                         if (existing != null)
                         {
-                            if (CanUndelete(existing, item))
+                            if (CanReuseExisting(existing, item))
                             {
                                 Undelete(existing);
                                 LogForModel(item, $"Found existing {HumanisedModelName} for {item} (ID {existing.ID}) – skipping import.");
@@ -429,7 +429,6 @@ namespace osu.Game.Database
             using (ContextFactory.GetForWrite())
             {
                 item.Hash = computeHash(item);
-
                 ModelStore.Update(item);
             }
         }
@@ -660,13 +659,29 @@ namespace osu.Game.Database
         protected TModel CheckForExisting(TModel model) => model.Hash == null ? null : ModelStore.ConsumableItems.FirstOrDefault(b => b.Hash == model.Hash);
 
         /// <summary>
-        /// After an existing <typeparamref name="TModel"/> is found during an import process, the default behaviour is to restore the existing
+        /// After an existing <typeparamref name="TModel"/> is found during an import process, the default behaviour is to use/restore the existing
         /// item and skip the import. This method allows changing that behaviour.
         /// </summary>
         /// <param name="existing">The existing model.</param>
         /// <param name="import">The newly imported model.</param>
         /// <returns>Whether the existing model should be restored and used. Returning false will delete the existing and force a re-import.</returns>
-        protected virtual bool CanUndelete(TModel existing, TModel import) => true;
+        protected virtual bool CanReuseExisting(TModel existing, TModel import) =>
+            // for the best or worst, we copy and import files of a new import before checking whether
+            // it is a duplicate. so to check if anything has changed, we can just compare all FileInfo IDs.
+            getIDs(existing.Files).SequenceEqual(getIDs(import.Files)) &&
+            getFilenames(existing.Files).SequenceEqual(getFilenames(import.Files));
+
+        private IEnumerable<long> getIDs(List<TFileModel> files)
+        {
+            foreach (var f in files.OrderBy(f => f.Filename))
+                yield return f.FileInfo.ID;
+        }
+
+        private IEnumerable<string> getFilenames(List<TFileModel> files)
+        {
+            foreach (var f in files.OrderBy(f => f.Filename))
+                yield return f.Filename;
+        }
 
         private DbSet<TModel> queryModel() => ContextFactory.Get().Set<TModel>();
 

osu.Game/Graphics/UserInterface/LoadingSpinner.cs

@@ -17,6 +17,8 @@ namespace osu.Game.Graphics.UserInterface
     {
         private readonly SpriteIcon spinner;
 
+        protected override bool StartHidden => true;
+
         protected Container MainContents;
 
         public const float TRANSITION_DURATION = 500;