1 files changed, 88 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Entities.Tests/AspectTests.cs b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Entities.Tests/AspectTests.cs
new file mode 100644
index 0000000..b06780b
--- /dev/null
+++ b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Entities.Tests/AspectTests.cs
@@ -0,0 +1,88 @@
+using System.Collections.Specialized;
+using MonoGame.Extended.Sprites;
+using Xunit;
+
+namespace MonoGame.Extended.Entities.Tests
+{
+    public class DummyComponent
+    {
+    }
+
+    public class AspectTests
+    {
+        private readonly ComponentManager _componentManager;
+        private readonly BitVector32 _entityA;
+        private readonly BitVector32 _entityB;
+
+        public AspectTests()
+        {
+            _componentManager = new ComponentManager();
+            _entityA = new BitVector32
+            {
+                [1 << _componentManager.GetComponentTypeId(typeof(Transform2))] = true,
+                [1 << _componentManager.GetComponentTypeId(typeof(Sprite))] = true,
+                [1 << _componentManager.GetComponentTypeId(typeof(DummyComponent))] = true
+            };
+            _entityB = new BitVector32
+            {
+                [1 << _componentManager.GetComponentTypeId(typeof(Transform2))] = true,
+                [1 << _componentManager.GetComponentTypeId(typeof(Sprite))] = true,
+            };
+        }
+
+        [Fact]
+        public void EmptyAspectMatchesAllComponents()
+        {
+            var componentManager = new ComponentManager();
+            var emptyAspect = Aspect.All()
+                .Build(componentManager);
+
+            Assert.True(emptyAspect.IsInterested(_entityA));
+            Assert.True(emptyAspect.IsInterested(_entityB));
+        }
+
+        [Fact]
+        public void IsInterestedInAllComponents()
+        {
+            var allAspect = Aspect
+                .All(typeof(Sprite), typeof(Transform2), typeof(DummyComponent))
+                .Build(_componentManager);
+
+            Assert.True(allAspect.IsInterested(_entityA));
+            Assert.False(allAspect.IsInterested(_entityB));
+        }
+
+        [Fact]
+        public void IsInterestedInEitherOneOfTheComponents()
+        {
+            var eitherOneAspect = Aspect
+                .One(typeof(Transform2), typeof(DummyComponent))
+                .Build(_componentManager);
+
+            Assert.True(eitherOneAspect.IsInterested(_entityA));
+            Assert.True(eitherOneAspect.IsInterested(_entityB));
+        }
+
+        [Fact]
+        public void IsInterestedInJustOneComponent()
+        {
+            var oneAspect = Aspect
+                .One(typeof(DummyComponent))
+                .Build(_componentManager);
+
+            Assert.True(oneAspect.IsInterested(_entityA));
+            Assert.False(oneAspect.IsInterested(_entityB));
+        }
+
+        [Fact]
+        public void IsInterestedInExcludingOneComponent()
+        {
+            var oneAspect = Aspect
+                .Exclude(typeof(DummyComponent))
+                .Build(_componentManager);
+
+            Assert.False(oneAspect.IsInterested(_entityA));
+            Assert.True(oneAspect.IsInterested(_entityB));
+        }
+    }
+}
+\ No newline at end of file