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osu-lazer/osu.Game.Tests/Editing/EditorChangeHandlerTest.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 NUnit.Framework;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Screens.Edit;
namespace osu.Game.Tests.Editing
{
[TestFixture]
public class EditorChangeHandlerTest
{
private int stateChangedFired;
[SetUp]
public void SetUp()
{
stateChangedFired = 0;
}
[Test]
public void TestSaveRestoreState()
{
var (handler, beatmap) = createChangeHandler();
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Assert.That(handler.CanUndo.Value, Is.False);
Assert.That(handler.CanRedo.Value, Is.False);
addArbitraryChange(beatmap);
handler.SaveState();
Assert.That(stateChangedFired, Is.EqualTo(1));
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Assert.That(handler.CanUndo.Value, Is.True);
Assert.That(handler.CanRedo.Value, Is.False);
handler.RestoreState(-1);
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Assert.That(handler.CanUndo.Value, Is.False);
Assert.That(handler.CanRedo.Value, Is.True);
Assert.That(stateChangedFired, Is.EqualTo(2));
}
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[Test]
public void TestApplyThenUndoThenApplySameChange()
{
var (handler, beatmap) = createChangeHandler();
Assert.That(handler.CanUndo.Value, Is.False);
Assert.That(handler.CanRedo.Value, Is.False);
string originalHash = handler.CurrentStateHash;
addArbitraryChange(beatmap);
handler.SaveState();
Assert.That(handler.CanUndo.Value, Is.True);
Assert.That(handler.CanRedo.Value, Is.False);
Assert.That(stateChangedFired, Is.EqualTo(1));
string hash = handler.CurrentStateHash;
// undo a change without saving
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handler.RestoreState(-1);
Assert.That(originalHash, Is.EqualTo(handler.CurrentStateHash));
Assert.That(stateChangedFired, Is.EqualTo(2));
addArbitraryChange(beatmap);
handler.SaveState();
Assert.That(hash, Is.EqualTo(handler.CurrentStateHash));
}
[Test]
public void TestSaveSameStateDoesNotSave()
{
var (handler, beatmap) = createChangeHandler();
Assert.That(handler.CanUndo.Value, Is.False);
Assert.That(handler.CanRedo.Value, Is.False);
addArbitraryChange(beatmap);
handler.SaveState();
Assert.That(handler.CanUndo.Value, Is.True);
Assert.That(handler.CanRedo.Value, Is.False);
Assert.That(stateChangedFired, Is.EqualTo(1));
string hash = handler.CurrentStateHash;
// save a save without making any changes
handler.SaveState();
Assert.That(hash, Is.EqualTo(handler.CurrentStateHash));
Assert.That(stateChangedFired, Is.EqualTo(1));
handler.RestoreState(-1);
Assert.That(hash, Is.Not.EqualTo(handler.CurrentStateHash));
// we should only be able to restore once even though we saved twice.
Assert.That(handler.CanUndo.Value, Is.False);
Assert.That(handler.CanRedo.Value, Is.True);
Assert.That(stateChangedFired, Is.EqualTo(2));
}
[Test]
public void TestMaxStatesSaved()
{
var (handler, beatmap) = createChangeHandler();
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Assert.That(handler.CanUndo.Value, Is.False);
for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES; i++)
{
Assert.That(stateChangedFired, Is.EqualTo(i));
addArbitraryChange(beatmap);
handler.SaveState();
}
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Assert.That(handler.CanUndo.Value, Is.True);
for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES; i++)
{
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Assert.That(handler.CanUndo.Value, Is.True);
handler.RestoreState(-1);
}
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Assert.That(handler.CanUndo.Value, Is.False);
}
[Test]
public void TestMaxStatesExceeded()
{
var (handler, beatmap) = createChangeHandler();
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Assert.That(handler.CanUndo.Value, Is.False);
for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES * 2; i++)
{
addArbitraryChange(beatmap);
handler.SaveState();
}
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Assert.That(handler.CanUndo.Value, Is.True);
for (int i = 0; i < EditorChangeHandler.MAX_SAVED_STATES; i++)
{
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Assert.That(handler.CanUndo.Value, Is.True);
handler.RestoreState(-1);
}
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Assert.That(handler.CanUndo.Value, Is.False);
}
private (EditorChangeHandler, EditorBeatmap) createChangeHandler()
{
var beatmap = new EditorBeatmap(new Beatmap());
var changeHandler = new EditorChangeHandler(beatmap);
changeHandler.OnStateChange += () => stateChangedFired++;
return (changeHandler, beatmap);
}
private void addArbitraryChange(EditorBeatmap beatmap)
{
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beatmap.Add(new HitCircle { StartTime = 2760 });
}
}
}