Add unit test for Matrix3x2.Invert

craftworkgames · Nov 8, 2024 · f91e141 · f91e141
1 parent c04d9c9
commit f91e141
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/tests/MonoGame.Extended.Tests/Math/Matrix3x2.cs b/tests/MonoGame.Extended.Tests/Math/Matrix3x2.cs
@@ -17,4 +17,20 @@ public void ConstructorTest()
         Assert.Equal(y, matrix.Y);
         Assert.Equal(z, matrix.Z);
     }
+
+    [Fact]
+    public void InverseTest()
+    {
+        Matrix3x2 posDeterminant = new Matrix3x2(3, -7, 4, 2, 13, -2);
+        Matrix3x2 singular = new Matrix3x2(2, 1, 4, 2, 3, -4);
+        Matrix3x2 negDeterminant = new Matrix3x2(1, -5, 3, 2, 3, -4);
+
+        Matrix3x2 posExpected = new Matrix3x2(1f/17, 7f/34, -2f/17, 3f/34, -1f, -5f/2);
+        Matrix3x2 singularExpected = Matrix3x2.Identity;
+        Matrix3x2 negExpected = new Matrix3x2(2f/17, 5f/17, -3f/17, 1f/17, -18f/17, -11f/17);
+
+        Assert.Equal(Matrix3x2.Invert(posDeterminant), posExpected);
+        Assert.Equal(Matrix3x2.Invert(singular), singularExpected);
+        Assert.Equal(Matrix3x2.Invert(negDeterminant), negExpected);
+    }
 }