mirror of https://github.com/ppy/osu
94 lines
3.1 KiB
C#
94 lines
3.1 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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#nullable disable
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using System.Collections.Generic;
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using NUnit.Framework;
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using osu.Game.Beatmaps;
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using osu.Game.Beatmaps.ControlPoints;
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using osu.Game.Rulesets.Objects;
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namespace osu.Game.Tests.NonVisual
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{
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public class ClosestBeatDivisorTest
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{
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[Test]
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public void TestExactDivisors()
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{
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var cpi = new ControlPointInfo();
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cpi.Add(0, new TimingControlPoint { BeatLength = 1000 });
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double[] divisors = { 3, 1, 16, 12, 8, 6, 4, 3, 2, 1 };
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assertClosestDivisors(divisors, divisors, cpi);
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}
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[Test]
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public void TestExactDivisorWithTempoChanges()
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{
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int offset = 0;
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int[] beatLengths = { 1000, 200, 100, 50 };
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var cpi = new ControlPointInfo();
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foreach (int beatLength in beatLengths)
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{
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cpi.Add(offset, new TimingControlPoint { BeatLength = beatLength });
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offset += beatLength * 2;
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}
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double[] divisors = { 3, 1, 16, 12, 8, 6, 4, 3 };
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assertClosestDivisors(divisors, divisors, cpi);
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}
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[Test]
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public void TestExactDivisorsHighBPMStream()
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{
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var cpi = new ControlPointInfo();
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cpi.Add(0, new TimingControlPoint { BeatLength = 50 }); // 1200 BPM 1/4 (limit testing)
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// A 1/4 stream should land on 1/1, 1/2 and 1/4 divisors.
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double[] divisors = { 4, 4, 4, 4, 4, 4, 4, 4 };
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double[] closestDivisors = { 4, 2, 4, 1, 4, 2, 4, 1 };
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assertClosestDivisors(divisors, closestDivisors, cpi, step: 1 / 4d);
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}
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[Test]
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public void TestApproximateDivisors()
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{
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var cpi = new ControlPointInfo();
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cpi.Add(0, new TimingControlPoint { BeatLength = 1000 });
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double[] divisors = { 3.03d, 0.97d, 14, 13, 7.94d, 6.08d, 3.93d, 2.96d, 2.02d, 64 };
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double[] closestDivisors = { 3, 1, 16, 12, 8, 6, 4, 3, 2, 1 };
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assertClosestDivisors(divisors, closestDivisors, cpi);
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}
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private static void assertClosestDivisors(IReadOnlyList<double> divisors, IReadOnlyList<double> closestDivisors, ControlPointInfo cpi, double step = 1)
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{
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List<HitObject> hitobjects = new List<HitObject>();
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double offset = cpi.TimingPoints[0].Time;
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for (int i = 0; i < divisors.Count; ++i)
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{
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double beatLength = cpi.TimingPointAt(offset).BeatLength;
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hitobjects.Add(new HitObject { StartTime = offset + beatLength / divisors[i] });
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offset += beatLength * step;
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}
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var beatmap = new Beatmap
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{
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HitObjects = hitobjects,
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ControlPointInfo = cpi
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};
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for (int i = 0; i < divisors.Count; ++i)
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Assert.AreEqual(closestDivisors[i], beatmap.ControlPointInfo.GetClosestBeatDivisor(beatmap.HitObjects[i].StartTime), $"at index {i}");
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}
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}
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}
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