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osu-lazer/osu.Game.Rulesets.Osu.Tests/OsuRateAdjustedDisplayDifficultyTest.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 System.Collections.Generic;
using NUnit.Framework;
using osu.Game.Beatmaps;
namespace osu.Game.Rulesets.Osu.Tests
{
[TestFixture]
public class OsuRateAdjustedDisplayDifficultyTest
{
private static IEnumerable<float> difficultyValuesToTest()
{
for (float i = 0; i <= 10; i += 0.5f)
yield return i;
}
[TestCaseSource(nameof(difficultyValuesToTest))]
public void TestApproachRateIsUnchangedWithRateEqualToOne(float originalApproachRate)
{
var ruleset = new OsuRuleset();
var difficulty = new BeatmapDifficulty { ApproachRate = originalApproachRate };
var adjustedDifficulty = ruleset.GetRateAdjustedDisplayDifficulty(difficulty, 1);
Assert.That(adjustedDifficulty.ApproachRate, Is.EqualTo(originalApproachRate));
}
[TestCaseSource(nameof(difficultyValuesToTest))]
public void TestOverallDifficultyIsUnchangedWithRateEqualToOne(float originalOverallDifficulty)
{
var ruleset = new OsuRuleset();
var difficulty = new BeatmapDifficulty { OverallDifficulty = originalOverallDifficulty };
var adjustedDifficulty = ruleset.GetRateAdjustedDisplayDifficulty(difficulty, 1);
Assert.That(adjustedDifficulty.OverallDifficulty, Is.EqualTo(originalOverallDifficulty));
}
[Test]
public void TestRateBelowOne()
{
var ruleset = new OsuRuleset();
var difficulty = new BeatmapDifficulty();
var adjustedDifficulty = ruleset.GetRateAdjustedDisplayDifficulty(difficulty, 0.75);
Assert.That(adjustedDifficulty.ApproachRate, Is.EqualTo(1.67).Within(0.01));
Assert.That(adjustedDifficulty.OverallDifficulty, Is.EqualTo(2.22).Within(0.01));
}
[Test]
public void TestRateAboveOne()
{
var ruleset = new OsuRuleset();
var difficulty = new BeatmapDifficulty();
var adjustedDifficulty = ruleset.GetRateAdjustedDisplayDifficulty(difficulty, 1.5);
Assert.That(adjustedDifficulty.ApproachRate, Is.EqualTo(7.67).Within(0.01));
Assert.That(adjustedDifficulty.OverallDifficulty, Is.EqualTo(7.77).Within(0.01));
}
}
}