Add tests

osu.Game.Tests/Resources/mania-skin-duplicate.ini

@@ -0,0 +1,9 @@
+[Mania]
+Keys: 4
+ColumnWidth: 10,10,10,10
+HitPosition: 470
+
+[Mania]
+Keys: 4
+ColumnWidth: 20,20,20,20
+HitPosition: 460

osu.Game.Tests/Resources/mania-skin-extra-data.ini

@@ -0,0 +1,4 @@
+[Mania]
+Keys: 4
+ColumnWidth: 10,10,10,10,10,10,10
+HitPosition: 470

osu.Game.Tests/Resources/mania-skin-multiple.ini

@@ -0,0 +1,9 @@
+[Mania]
+Keys: 4
+ColumnWidth: 10,10,10,10
+HitPosition: 470
+
+[Mania]
+Keys: 2
+ColumnWidth: 20,20
+HitPosition: 460

osu.Game.Tests/Resources/mania-skin-single.ini

@@ -0,0 +1,4 @@
+[Mania]
+Keys: 4
+ColumnWidth: 10,10,10,10
+HitPosition: 470

osu.Game.Tests/Skins/LegacyManiaSkinDecoderTest.cs

@@ -0,0 +1,87 @@
+// 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.IO;
+using osu.Game.Skinning;
+using osu.Game.Tests.Resources;
+
+namespace osu.Game.Tests.Skins
+{
+    [TestFixture]
+    public class LegacyManiaSkinDecoderTest
+    {
+        [Test]
+        public void TestParseSingleConfig()
+        {
+            var decoder = new LegacyManiaSkinDecoder();
+
+            using (var resStream = TestResources.OpenResource("mania-skin-single.ini"))
+            using (var stream = new LineBufferedReader(resStream))
+            {
+                var configs = decoder.Decode(stream);
+
+                Assert.That(configs.Count, Is.EqualTo(1));
+                Assert.That(configs[0].Keys, Is.EqualTo(4));
+                Assert.That(configs[0].ColumnWidth, Is.EquivalentTo(new float[] { 16, 16, 16, 16 }));
+                Assert.That(configs[0].HitPosition, Is.EqualTo(16));
+            }
+        }
+
+        [Test]
+        public void TestParseMultipleConfig()
+        {
+            var decoder = new LegacyManiaSkinDecoder();
+
+            using (var resStream = TestResources.OpenResource("mania-skin-multiple.ini"))
+            using (var stream = new LineBufferedReader(resStream))
+            {
+                var configs = decoder.Decode(stream);
+
+                Assert.That(configs.Count, Is.EqualTo(2));
+
+                Assert.That(configs[0].Keys, Is.EqualTo(4));
+                Assert.That(configs[0].ColumnWidth, Is.EquivalentTo(new float[] { 16, 16, 16, 16 }));
+                Assert.That(configs[0].HitPosition, Is.EqualTo(16));
+
+                Assert.That(configs[1].Keys, Is.EqualTo(2));
+                Assert.That(configs[1].ColumnWidth, Is.EquivalentTo(new float[] { 32, 32 }));
+                Assert.That(configs[1].HitPosition, Is.EqualTo(32));
+            }
+        }
+
+        [Test]
+        public void TestParseDuplicateConfig()
+        {
+            var decoder = new LegacyManiaSkinDecoder();
+
+            using (var resStream = TestResources.OpenResource("mania-skin-single.ini"))
+            using (var stream = new LineBufferedReader(resStream))
+            {
+                var configs = decoder.Decode(stream);
+
+                Assert.That(configs.Count, Is.EqualTo(1));
+                Assert.That(configs[0].Keys, Is.EqualTo(4));
+                Assert.That(configs[0].ColumnWidth, Is.EquivalentTo(new float[] { 16, 16, 16, 16 }));
+                Assert.That(configs[0].HitPosition, Is.EqualTo(16));
+            }
+        }
+
+        [Test]
+        public void TestParseWithUnnecessaryExtraData()
+        {
+            var decoder = new LegacyManiaSkinDecoder();
+
+            using (var resStream = TestResources.OpenResource("mania-skin-extra-data.ini"))
+            using (var stream = new LineBufferedReader(resStream))
+            {
+                var configs = decoder.Decode(stream);
+
+                Assert.That(configs.Count, Is.EqualTo(1));
+                Assert.That(configs[0].Keys, Is.EqualTo(4));
+                Assert.That(configs[0].ColumnWidth, Is.EquivalentTo(new float[] { 16, 16, 16, 16 }));
+                Assert.That(configs[0].HitPosition, Is.EqualTo(16));
+            }
+        }
+    }
+}