Add mod settings equality test

osu.Game.Tests/Mods/ModSettingsEqualityComparsion.cs

@@ -0,0 +1,36 @@
+// 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.Game.Online.API;
+using osu.Game.Rulesets.Osu.Mods;
+
+namespace osu.Game.Tests.Mods
+{
+    [TestFixture]
+    public class ModSettingsEqualityComparison
+    {
+        [Test]
+        public void Test()
+        {
+            var mod1 = new OsuModDoubleTime { SpeedChange = { Value = 1.25 } };
+            var mod2 = new OsuModDoubleTime { SpeedChange = { Value = 1.26 } };
+            var mod3 = new OsuModDoubleTime { SpeedChange = { Value = 1.26 } };
+            var apiMod1 = new APIMod(mod1);
+            var apiMod2 = new APIMod(mod2);
+            var apiMod3 = new APIMod(mod3);
+
+            Assert.That(mod1, Is.Not.EqualTo(mod2));
+            Assert.That(apiMod1, Is.Not.EqualTo(apiMod2));
+
+            Assert.That(mod2, Is.EqualTo(mod2));
+            Assert.That(apiMod2, Is.EqualTo(apiMod2));
+
+            Assert.That(mod2, Is.EqualTo(mod3));
+            Assert.That(apiMod2, Is.EqualTo(apiMod3));
+
+            Assert.That(mod3, Is.EqualTo(mod2));
+            Assert.That(apiMod3, Is.EqualTo(apiMod2));
+        }
+    }
+}