@Test
public void getLayerShouldParseBackgroundLayer() throws JSONException, IOException {

        JSONArray jsonArray = new JSONArray(
                IOUtil.readInputStreamAsString(context.getAssets().open("streets-base-layers.json"))
        );
    Layer backgroundLayer = layerUtil.getLayer(jsonArray.get(0).toString());
    Assert.assertTrue(backgroundLayer instanceof BackgroundLayer);
    ShadowLayer shadowLayer = (ShadowLayer) Shadow.extract(backgroundLayer);
    Assert.assertTrue(shadowLayer.getPropertyValues().containsKey("background-color"));
}