Add TestCaseMatchParticipants.

osu.Game.Tests/Visual/TestCaseMatchInfo.cs

@@ -22,7 +22,6 @@ namespace osu.Game.Tests.Visual
             AddStep(@"set name", () => info.Name = @"Room Name?");
             AddStep(@"set availability", () => info.Availability = RoomAvailability.FriendsOnly);
             AddStep(@"set status", () => info.Status = new RoomStatusPlaying());
-
             AddStep(@"set beatmap", () => info.Beatmap = new BeatmapInfo
             {
                 StarDifficulty = 2.4,
@@ -40,7 +39,6 @@ namespace osu.Game.Tests.Visual
             AddStep(@"change name", () => info.Name = @"Room Name!");
             AddStep(@"change availability", () => info.Availability = RoomAvailability.InviteOnly);
             AddStep(@"change status", () => info.Status = new RoomStatusOpen());
-
             AddStep(@"change beatmap", () => info.Beatmap = new BeatmapInfo
             {
                 StarDifficulty = 4.2,

osu.Game.Tests/Visual/TestCaseMatchParticipants.cs

@@ -0,0 +1,56 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Game.Screens.Multi.Screens.Match;
+using osu.Game.Users;
+
+namespace osu.Game.Tests.Visual
+{
+    [TestFixture]
+    public class TestCaseMatchParticipants : OsuTestCase
+    {
+        public TestCaseMatchParticipants()
+        {
+            Participants participants;
+            Add(participants = new Participants
+            {
+                RelativeSizeAxes = Axes.Both,
+            });
+
+            AddStep(@"set max to null", () => participants.Max = null);
+            AddStep(@"set users", () => participants.Users = new[]
+            {
+                new User
+                {
+                    Username = @"Feppla",
+                    Id = 4271601,
+                    Country = new Country { FlagName = @"SE" },
+                    CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c2.jpg",
+                    IsSupporter = true,
+                },
+                new User
+                {
+                    Username = @"Xilver",
+                    Id = 3099689,
+                    Country = new Country { FlagName = @"IL" },
+                    CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c2.jpg",
+                    IsSupporter = true,
+                },
+                new User
+                {
+                    Username = @"Wucki",
+                    Id = 5287410,
+                    Country = new Country { FlagName = @"FI" },
+                    CoverUrl = @"https://assets.ppy.sh/user-profile-covers/5287410/5cfeaa9dd41cbce038ecdc9d781396ed4b0108089170bf7f50492ef8eadeb368.jpeg",
+                    IsSupporter = true,
+                },
+            });
+
+            AddStep(@"set max", () => participants.Max = 10);
+            AddStep(@"clear users", () => participants.Users = new User[] { });
+            AddStep(@"set max to null", () => participants.Max = null);
+        }
+    }
+}

osu.Game/Screens/Multi/Screens/Match/Participants.cs

@@ -25,6 +25,7 @@ namespace osu.Game.Screens.Multi.Screens.Match
                     Anchor = Anchor.TopCentre,
                     Origin = Anchor.TopCentre,
                     Width = 300,
+                    OnLoadComplete = d => d.FadeInFromZero(60),
                 }).ToList();
 
                 count.Count = value.Count();
@@ -61,6 +62,8 @@ namespace osu.Game.Screens.Multi.Screens.Match
                                 AutoSizeAxes = Axes.Y,
                                 Spacing = new Vector2(5),
                                 Padding = new MarginPadding { Top = 40 },
+                                LayoutDuration = 200,
+                                LayoutEasing = Easing.OutQuint,
                             },
                         },
                     },