Add a unit test for HaxeFlixel#2107

CHANGELOG.md

@@ -13,6 +13,7 @@
 
 - `FlxDebugger` console: fixed enum completion on non-Flash targets ([404c16b3](https://github.com/HaxeFlixel/flixel/commit/404c16b3))
 - `FlxMouseEventManager`: fixed mouseOver being fired before mouseOut ([#2103](https://github.com/HaxeFlixel/flixel/issues/2103))
+- `FlxAssetPaths`: fixed `filterExtensions` for files with multiple dots ([#2107](https://github.com/HaxeFlixel/flixel/issues/2107))
 
 4.3.0 (July 22, 2017)
 ------------------------------

flixel/system/macros/FlxAssetPaths.hx

@@ -48,7 +48,7 @@ class FlxAssetPaths
 				if (filterExtensions != null)
 				{
 					var extension:String = name.split(".").last(); // get the last string with a dot before it
-					if (filterExtensions.indexOf(extension) == -1)
+					if (!filterExtensions.contains(extension))
 						continue;
 				}
 

tests/unit/src/flixel/system/macros/FlxAssetPathsTest.hx

@@ -0,0 +1,26 @@
+package flixel.system.macros;
+
+import massive.munit.Assert;
+
+class FlxAssetPathsTest extends FlxTest
+{
+	@Test
+	function testIgnoreInvisibleFiles()
+	{
+		var files:Int = Type.getClassFields(InvisibleFile).length;
+		Assert.areEqual(0, files);
+	}
+
+	@Test // #2107
+	function testExtensionFilterWithMultiDotFile()
+	{
+		var files:Int = Type.getClassFields(ExtensionFilterWithMultiDotFile).length;
+		Assert.areEqual(1, files);
+	}
+}
+
+@:build(flixel.system.FlxAssets.buildFileReferences("assets/FlxAssetPaths/invisibleFile"))
+class InvisibleFile {}
+
+@:build(flixel.system.FlxAssets.buildFileReferences("assets/FlxAssetPaths/fileWithMultipleDots", false, ["txt"]))
+class ExtensionFilterWithMultiDotFile {}