add tests for ui transforms

Author: popcron

tests/UITransformTests.cs

@@ -0,0 +1,23 @@
+using System;
+using Worlds;
+
+namespace UI.Tests
+{
+    public class UITransformTests : UITests
+    {
+        [Test]
+        public void RotateTransform()
+        {
+            using World world = CreateWorld();
+            UITransform a = new(world, new(-123, 6990), new(100, 800), MathF.Tau * 0.25f);
+            Assert.That(a.Position.X, Is.EqualTo(-123));
+            Assert.That(a.Position.Y, Is.EqualTo(6990));
+            Assert.That(a.Rotation, Is.EqualTo(MathF.Tau * 0.25f).Within(0.01f));
+            Assert.That(a.Width, Is.EqualTo(100));
+            Assert.That(a.Height, Is.EqualTo(800));
+
+            UITransform b = new(world, new(-123, 6990), new(100, 800), MathF.Tau * -0.5f);
+            Assert.That(b.Rotation, Is.EqualTo(MathF.Tau * 0.5f).Within(0.01f));
+        }
+    }
+}