Add test scene for seedings editor

osu.Game.Tournament.Tests/Screens/TestSceneSeedingEditorScreen.cs

@@ -0,0 +1,25 @@
+// 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 osu.Framework.Allocation;
+using osu.Game.Tournament.Models;
+using osu.Game.Tournament.Screens.Editors;
+
+namespace osu.Game.Tournament.Tests.Screens
+{
+    public class TestSceneSeedingEditorScreen : LadderTestScene
+    {
+        [Cached]
+        private readonly LadderInfo ladder = new LadderInfo();
+
+        public TestSceneSeedingEditorScreen()
+        {
+            var match = TestSceneSeedingScreen.CreateSampleSeededMatch();
+
+            Add(new SeedingEditorScreen(match.Team1.Value)
+            {
+                Width = 0.85f // create room for control panel
+            });
+        }
+    }
+}