EmptyGameAssetLoader implements GameAssetLoader { @Override public void put(Map<String, Class<?>> assets) { }  @Override void put(Map<String, Class<?>> assets);  }
@Test public void testPutEmpty() { EmptyGameAssetLoader loader = new EmptyGameAssetLoader(); Map<String, Class<?>> map = new HashMap<String, Class<?>>(); loader.put(map); assertThat(map).isEmpty(); }