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osu-lazer/osu.Game.Tests/Visual/Editing/TestSceneTimelineZoom.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.Framework.Graphics;
namespace osu.Game.Tests.Visual.Editing
{
public partial class TestSceneTimelineZoom : TimelineTestScene
{
public override Drawable CreateTestComponent() => Empty();
[Test]
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public void TestVisibleRangeUpdatesOnZoomChange()
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{
double initialVisibleRange = 0;
AddStep("reset zoom", () => TimelineArea.Timeline.Zoom = 100);
AddStep("get initial range", () => initialVisibleRange = TimelineArea.Timeline.VisibleRange);
AddStep("scale zoom", () => TimelineArea.Timeline.Zoom = 200);
AddStep("range halved", () => Assert.That(TimelineArea.Timeline.VisibleRange, Is.EqualTo(initialVisibleRange / 2).Within(1)));
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AddStep("descale zoom", () => TimelineArea.Timeline.Zoom = 50);
AddStep("range doubled", () => Assert.That(TimelineArea.Timeline.VisibleRange, Is.EqualTo(initialVisibleRange * 2).Within(1)));
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AddStep("restore zoom", () => TimelineArea.Timeline.Zoom = 100);
AddStep("range restored", () => Assert.That(TimelineArea.Timeline.VisibleRange, Is.EqualTo(initialVisibleRange).Within(1)));
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}
[Test]
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public void TestVisibleRangeConstantOnSizeChange()
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{
double initialVisibleRange = 0;
AddStep("reset timeline size", () => TimelineArea.Timeline.Width = 1);
AddStep("get initial range", () => initialVisibleRange = TimelineArea.Timeline.VisibleRange);
AddStep("scale timeline size", () => TimelineArea.Timeline.Width = 2);
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AddAssert("same range", () => TimelineArea.Timeline.VisibleRange == initialVisibleRange);
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AddStep("descale timeline size", () => TimelineArea.Timeline.Width = 0.5f);
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AddAssert("same range", () => TimelineArea.Timeline.VisibleRange == initialVisibleRange);
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AddStep("restore timeline size", () => TimelineArea.Timeline.Width = 1);
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AddAssert("same range", () => TimelineArea.Timeline.VisibleRange == initialVisibleRange);
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}
}
}