1 files changed, 101 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Vector2ExtensionsTests.cs b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Vector2ExtensionsTests.cs
new file mode 100644
index 0000000..aa1d889
--- /dev/null
+++ b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Vector2ExtensionsTests.cs
@@ -0,0 +1,101 @@
+using Microsoft.Xna.Framework;
+using Xunit;
+
+namespace MonoGame.Extended.Tests
+{
+    public class Vector2ExtensionsTests
+    {
+        [Fact]
+        public void Vector2_EqualsWithTolerence_Test()
+        {
+            var a = new Vector2(1f, 1f);
+            var b = new Vector2(1.0000001f, 1.0000001f);
+
+            Assert.False(a.Equals(b));
+            Assert.True(a.EqualsWithTolerence(b));
+        }
+
+        [Fact]
+        public void Vector2_NormalizedCopy_Test()
+        {
+            var a = new Vector2(5, -10);
+            var b = a.NormalizedCopy();
+
+            Assert.True(new Vector2(0.4472136f, -0.8944272f).EqualsWithTolerence(b));
+        }
+
+        [Fact]
+        public void Vector2_Perpendicular_Test()
+        {
+            // http://mathworld.wolfram.com/PerpendicularVector.html
+            var a = new Vector2(5, -10);
+            var b = a.PerpendicularClockwise();
+            var c = a.PerpendicularCounterClockwise();
+
+            Assert.Equal(new Vector2(-10, -5), b);
+            Assert.Equal(new Vector2(10, 5), c);
+        }
+
+        [Fact]
+        public void Vector2_Rotate_90_Degrees_Test()
+        {
+            var a = new Vector2(0, -10);
+            var b = a.Rotate(MathHelper.ToRadians(90));
+
+            Assert.True(new Vector2(10, 0).EqualsWithTolerence(b));
+        }
+
+        [Fact]
+        public void Vector2_Rotate_360_Degrees_Test()
+        {
+            var a = new Vector2(0, 10);
+            var b = a.Rotate(MathHelper.ToRadians(360));
+
+            Assert.True(new Vector2(0, 10).EqualsWithTolerence(b));
+        }
+
+        [Fact]
+        public void Vector2_Rotate_45_Degrees_Test()
+        {
+            var a = new Vector2(0, -10);
+            var b = a.Rotate(MathHelper.ToRadians(45));
+
+            Assert.True(new Vector2(7.071068f, -7.071068f).EqualsWithTolerence(b));
+        }
+
+        [Fact]
+        public void Vector2_Truncate_Test()
+        {
+            var a = new Vector2(10, 10);
+            var b = a.Truncate(5);
+
+            Assert.Equal(5f, b.Length(), 3);
+        }
+
+        [Fact]
+        public void Vector2_IsNaN_Test()
+        {
+            var a = new Vector2(float.NaN, 10);
+            var b = new Vector2(10, float.NaN);
+            var c = new Vector2(float.NaN, float.NaN);
+            var d = new Vector2(10, 10);
+
+            Assert.True(a.IsNaN());
+            Assert.True(b.IsNaN());
+            Assert.True(c.IsNaN());
+            Assert.False(d.IsNaN());
+        }
+
+        [Fact]
+        public void Vector2_ToAngle_Test()
+        {
+            var a = new Vector2(0, -10);
+            var b = new Vector2(10, 0);
+            var c = -Vector2.UnitY.Rotate(MathHelper.ToRadians(45));
+
+            Assert.Equal(MathHelper.ToRadians(0), a.ToAngle());
+            Assert.Equal(MathHelper.ToRadians(90), b.ToAngle());
+            Assert.Equal(MathHelper.ToRadians(45), c.ToAngle());
+        }
+    }
+}