Implement the match beatmap detail area

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchBeatmapDetailArea.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.Linq;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Utils;
+using osu.Game.Beatmaps;
+using osu.Game.Online.Multiplayer;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Osu.Mods;
+using osu.Game.Screens.Multi.Components;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.Multiplayer
+{
+    public class TestSceneMatchBeatmapDetailArea : MultiplayerTestScene
+    {
+        [Resolved]
+        private BeatmapManager beatmapManager { get; set; }
+
+        [Resolved]
+
+        private RulesetStore rulesetStore { get; set; }
+
+        private MatchBeatmapDetailArea detailArea;
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            Room.Playlist.Clear();
+
+            Child = detailArea = new MatchBeatmapDetailArea
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Size = new Vector2(500),
+                CreateNewItem = createNewItem
+            };
+        });
+
+        private void createNewItem()
+        {
+            var set = beatmapManager.GetAllUsableBeatmapSetsEnumerable().First();
+            var rulesets = rulesetStore.AvailableRulesets.ToList();
+
+            var beatmap = set.Beatmaps[RNG.Next(0, set.Beatmaps.Count)];
+
+            beatmap.BeatmapSet = set;
+            beatmap.Metadata = set.Metadata;
+
+            Room.Playlist.Add(new PlaylistItem
+            {
+                ID = Room.Playlist.Count,
+                Beatmap = { Value = beatmap },
+                Ruleset = { Value = rulesets[RNG.Next(0, rulesets.Count)] },
+                RequiredMods =
+                {
+                    new OsuModHardRock(),
+                    new OsuModDoubleTime(),
+                    new OsuModAutoplay()
+                }
+            });
+        }
+    }
+}