Updated tests and process to add components in correct order

Author: grofit

src/EcsRx.Tests/Database/ComponentDatabaseTests.cs renamed to src/EcsRx.Tests/Framework/Database/ComponentDatabaseTests.cs

@@ -146,5 +146,22 @@ public void should_remove_all_components_when_disposing()
             Assert.True(afterWasCalled);
             Assert.Empty(entity.Components);
         }
+
+        [Fact]
+        public void should_add_components_in_parameter_order()
+        {
+            var fakeEntityId = 1;
+            var fakeComponents = new IComponent[] {new TestComponentOne(), new TestComponentTwo(), new TestComponentThree()};
+
+            var componentRepository = Substitute.For<IComponentRepository>();
+            var entity = new Entity(fakeEntityId, componentRepository);
+            entity.AddComponents(fakeComponents);
+            
+            Received.InOrder(() => {
+                componentRepository.Add(fakeEntityId, fakeComponents[0]);
+                componentRepository.Add(fakeEntityId, fakeComponents[1]);
+                componentRepository.Add(fakeEntityId, fakeComponents[2]);
+            });
+        }
     }
 }

src/EcsRx.Tests/Database/ComponentRepositoryTests.cs renamed to src/EcsRx.Tests/Framework/Database/ComponentRepositoryTests.cs

@@ -36,7 +36,7 @@ public Entity(int id, IComponentRepository componentRepository)
         public void AddComponents(params IComponent[] components)
         {
             var componentTypeIds = new int[components.Length];
-            for (var i = components.Length - 1; i >= 0; i--)
+            for (var i = 0; i < components.Length; i++)
             { componentTypeIds[i] = ComponentRepository.Add(Id, components[i]); }            
 
             _onComponentsAdded.OnNext(componentTypeIds);