Add tests

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

@@ -0,0 +1,47 @@
+// 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.Linq;
+using NUnit.Framework;
+using osu.Framework.Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Testing;
+using osu.Game.Online.API;
+using osu.Game.Rulesets.Osu.Mods;
+using osu.Game.Rulesets.UI;
+using osu.Game.Screens.OnlinePlay.Multiplayer;
+
+namespace osu.Game.Tests.Visual.Multiplayer
+{
+    public partial class TestSceneMultiplayerUserModDisplay : MultiplayerTestScene
+    {
+        private MultiplayerUserModDisplay modDisplay = null!;
+
+        public override void SetUpSteps()
+        {
+            base.SetUpSteps();
+
+            AddStep("join room", () => JoinRoom(CreateDefaultRoom()));
+            WaitForJoined();
+
+            AddStep("add display", () => Child = modDisplay = new MultiplayerUserModDisplay
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre
+            });
+        }
+
+        [Test]
+        public void TestChangeMods()
+        {
+            AddStep("set DT", () => MultiplayerClient.ChangeUserMods([new OsuModDoubleTime()]).WaitSafely());
+            AddUntilStep("mod displayed", () => modDisplay.ChildrenOfType<ModIcon>().Count() == 1);
+
+            AddStep("set DT, HR", () => MultiplayerClient.ChangeUserMods([new OsuModDoubleTime(), new OsuModHardRock()]).WaitSafely());
+            AddUntilStep("mods displayed", () => modDisplay.ChildrenOfType<ModIcon>().Count() == 2);
+
+            AddStep("set no mods", () => MultiplayerClient.ChangeUserMods(Enumerable.Empty<APIMod>()).WaitSafely());
+            AddUntilStep("no mods displayed", () => !modDisplay.ChildrenOfType<ModIcon>().Any());
+        }
+    }
+}