// 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); } } }