added tests to check whether an overwritten method is recognized
added tests to check whether an overwritten method is recognized

babelsberg/babelsberg-js,fniephaus/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js,psieg/babelsberg-js,babelsberg/babelsberg-js,fniephaus/babelsberg-js,fniephaus/babelsberg-js,babelsberg/babelsberg-js,psieg/babelsberg-js,babelsberg/babelsberg-js,psieg/babelsberg-js