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osu-lazer/osu.Game.Tests/Database/GeneralUsageTests.cs
Dean Herbert 4306420922 Add extension methods to add extra safety to realm subscriptions
Also adjusts the naming and documentation to make it (hopefully) easier
to understand what this method/process implies.
2021-12-01 15:09:53 +09:00

103 lines
3.0 KiB
C#

// 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.Threading;
using System.Threading.Tasks;
using NUnit.Framework;
using osu.Game.Database;
using osu.Game.Models;
#nullable enable
namespace osu.Game.Tests.Database
{
[TestFixture]
public class GeneralUsageTests : RealmTest
{
/// <summary>
/// Just test the construction of a new database works.
/// </summary>
[Test]
public void TestConstructRealm()
{
RunTestWithRealm((realmFactory, _) => { realmFactory.CreateContext().Refresh(); });
}
[Test]
public void TestBlockOperations()
{
RunTestWithRealm((realmFactory, _) =>
{
using (realmFactory.BlockAllOperations())
{
}
});
}
/// <summary>
/// Test to ensure that a `CreateContext` call nested inside a subscription doesn't cause any deadlocks
/// due to context fetching semaphores.
/// </summary>
[Test]
public void TestNestedContextCreationWithSubscription()
{
RunTestWithRealm((realmFactory, _) =>
{
bool callbackRan = false;
using (var context = realmFactory.CreateContext())
{
var subscription = context.All<RealmBeatmap>().QueryAsyncWithNotifications((sender, changes, error) =>
{
using (realmFactory.CreateContext())
{
callbackRan = true;
}
});
// Force the callback above to run.
using (realmFactory.CreateContext())
{
}
subscription?.Dispose();
}
Assert.IsTrue(callbackRan);
});
}
[Test]
public void TestBlockOperationsWithContention()
{
RunTestWithRealm((realmFactory, _) =>
{
ManualResetEventSlim stopThreadedUsage = new ManualResetEventSlim();
ManualResetEventSlim hasThreadedUsage = new ManualResetEventSlim();
Task.Factory.StartNew(() =>
{
using (realmFactory.CreateContext())
{
hasThreadedUsage.Set();
stopThreadedUsage.Wait();
}
}, TaskCreationOptions.LongRunning | TaskCreationOptions.HideScheduler);
hasThreadedUsage.Wait();
Assert.Throws<TimeoutException>(() =>
{
using (realmFactory.BlockAllOperations())
{
}
});
stopThreadedUsage.Set();
});
}
}
}