Implement BeatmapSearchFilter component

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

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+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Online.API.Requests;
+using osu.Game.Overlays;
+using osu.Game.Overlays.BeatmapListing;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestSceneBeatmapSearchFilter : OsuTestScene
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(BeatmapSearchFilter<>),
+            typeof(BeatmapSearchRulesetFilter)
+        };
+
+        [Cached]
+        private readonly OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Blue);
+
+        private readonly FillFlowContainer resizableContainer;
+
+        public TestSceneBeatmapSearchFilter()
+        {
+            Add(resizableContainer = new FillFlowContainer
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                AutoSizeAxes = Axes.Y,
+                Width = 600,
+                Direction = FillDirection.Vertical,
+                Spacing = new Vector2(0, 10),
+                Children = new Drawable[]
+                {
+                    new BeatmapSearchRulesetFilter(),
+                    new BeatmapSearchFilter<BeatmapSearchCategory>(),
+                }
+            });
+        }
+
+        [Test]
+        public void TestResize()
+        {
+            AddStep("Resize to 100px", () => resizableContainer.ResizeWidthTo(100, 1000));
+            AddStep("Resize to 600px", () => resizableContainer.ResizeWidthTo(600, 1000));
+        }
+    }
+}