osu/osu.Game.Tests/ScrollAlgorithms/SequentialScrollTest.cs
2020-05-21 21:56:59 +02:00

79 lines
3.3 KiB
C#

// 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.Lists;
using osu.Game.Rulesets.Timing;
using osu.Game.Rulesets.UI.Scrolling.Algorithms;
namespace osu.Game.Tests.ScrollAlgorithms
{
[TestFixture]
public class SequentialScrollTest
{
private IScrollAlgorithm algorithm;
[SetUp]
public void Setup()
{
var controlPoints = new SortedList<MultiplierControlPoint>
{
new MultiplierControlPoint(0) { Velocity = 1 },
new MultiplierControlPoint(10000) { Velocity = 2f },
new MultiplierControlPoint(20000) { Velocity = 0.5f }
};
algorithm = new SequentialScrollAlgorithm(controlPoints);
}
[Test]
public void TestDisplayStartTime()
{
// easy cases - time range adjusted for velocity fits within control point duration
Assert.AreEqual(2500, algorithm.GetDisplayStartTime(5000, 0, 2500, 1)); // 5000 - (2500 / 1)
Assert.AreEqual(13750, algorithm.GetDisplayStartTime(15000, 0, 2500, 1)); // 15000 - (2500 / 2)
Assert.AreEqual(20000, algorithm.GetDisplayStartTime(25000, 0, 2500, 1)); // 25000 - (2500 / 0.5)
// hard case - time range adjusted for velocity exceeds control point duration
// 1st multiplier point takes 10000 / 2500 = 4 scroll lengths
// 2nd multiplier point takes 10000 / (2500 / 2) = 8 scroll lengths
// 3rd multiplier point takes 2500 / (2500 * 2) = 0.5 scroll lengths up to hitobject start
// absolute position of the hitobject = 1000 * (4 + 8 + 0.5) = 12500
// minus one scroll length allowance = 12500 - 1000 = 11500 = 11.5 [scroll lengths]
// therefore the start time lies within the second multiplier point (because 11.5 < 4 + 8)
// its exact time position is = 10000 + 7.5 * (2500 / 2) = 19375
Assert.AreEqual(19375, algorithm.GetDisplayStartTime(22500, 0, 2500, 1000));
}
[Test]
public void TestLength()
{
Assert.AreEqual(1f / 5, algorithm.GetLength(0, 1000, 5000, 1)); // Like constant
Assert.AreEqual(1f / 5, algorithm.GetLength(10000, 10500, 5000, 1)); // (10500 - 10000) / 0.5 / 5000
Assert.AreEqual(1f / 5, algorithm.GetLength(20000, 22000, 5000, 1)); // (22000 - 20000) * 0.5 / 5000
}
[Test]
public void TestPosition()
{
// Basically same calculations as TestLength()
Assert.AreEqual(1f / 5, algorithm.PositionAt(1000, 0, 5000, 1));
Assert.AreEqual(1f / 5, algorithm.PositionAt(10500, 10000, 5000, 1));
Assert.AreEqual(1f / 5, algorithm.PositionAt(22000, 20000, 5000, 1));
}
[TestCase(1000)]
[TestCase(10000)]
[TestCase(15000)]
[TestCase(20000)]
[TestCase(25000)]
public void TestTime(double time)
{
Assert.AreEqual(time, algorithm.TimeAt(algorithm.PositionAt(time, 0, 5000, 1), 0, 5000, 1), 0.001);
Assert.AreEqual(time, algorithm.TimeAt(algorithm.PositionAt(time, 5000, 5000, 1), 5000, 5000, 1), 0.001);
}
}
}