@Test
public void generateNativeAdUrl_shouldNotIncludeDesiredAssetsIfNotSet() throws Exception {

    subject = new NativeUrlGenerator(context).withAdUnitId(AD_UNIT_ID);
    String requestString = generateMinimumUrlString();
    List<String> desiredAssets = getDesiredAssetsListFromRequestUrlString(requestString);
    assertThat(desiredAssets.size()).isEqualTo(0);
}