### Question:
RenderLayers { public int size() { return renderLayers.size(); } RenderLayers(); void add(String layerName, RenderLayer layer); void add(String layerName, RenderLayer layer, boolean enabled); RenderLayer get(String layerName); void disable(String layerName); void enable(String layerName); void toggle(String layerName); int size(); RenderLayer get(int layer);  }### Answer:
@Test public void shouldStartWithNoLayers() { RenderLayers renderLayers = new RenderLayers(); assertThat(renderLayers.size(), IsEqual.equalTo(0)); }