Rename editor tests namespace from "Editor" to "Editing"

osu.Game.Tests/Editing/EditorChangeHandlerTest.cs

@@ -0,0 +1,74 @@
+// 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 NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Screens.Edit;
+
+namespace osu.Game.Tests.Editing
+{
+    [TestFixture]
+    public class EditorChangeHandlerTest
+    {
+        [Test]
+        public void TestSaveRestoreState()
+        {
+            var handler = new EditorChangeHandler(new EditorBeatmap(new Beatmap()));
+
+            Assert.That(handler.CanUndo.Value, Is.False);
+            Assert.That(handler.CanRedo.Value, Is.False);
+
+            handler.SaveState();
+
+            Assert.That(handler.CanUndo.Value, Is.True);
+            Assert.That(handler.CanRedo.Value, Is.False);
+
+            handler.RestoreState(-1);
+
+            Assert.That(handler.CanUndo.Value, Is.False);
+            Assert.That(handler.CanRedo.Value, Is.True);
+        }
+
+        [Test]
+        public void TestMaxStatesSaved()
+        {
+            var handler = new EditorChangeHandler(new EditorBeatmap(new Beatmap()));
+
+            Assert.That(handler.CanUndo.Value, Is.False);
+
+            for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES; i++)
+                handler.SaveState();
+
+            Assert.That(handler.CanUndo.Value, Is.True);
+
+            for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES; i++)
+            {
+                Assert.That(handler.CanUndo.Value, Is.True);
+                handler.RestoreState(-1);
+            }
+
+            Assert.That(handler.CanUndo.Value, Is.False);
+        }
+
+        [Test]
+        public void TestMaxStatesExceeded()
+        {
+            var handler = new EditorChangeHandler(new EditorBeatmap(new Beatmap()));
+
+            Assert.That(handler.CanUndo.Value, Is.False);
+
+            for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES * 2; i++)
+                handler.SaveState();
+
+            Assert.That(handler.CanUndo.Value, Is.True);
+
+            for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES; i++)
+            {
+                Assert.That(handler.CanUndo.Value, Is.True);
+                handler.RestoreState(-1);
+            }
+
+            Assert.That(handler.CanUndo.Value, Is.False);
+        }
+    }
+}