@Test
public void checkGetGroupIds(){

    final RepositoryHandler repositoryHandler = mock(RepositoryHandler.class);
    final ArtifactHandler handler = new ArtifactHandler(repositoryHandler, mock(LicenseMatcher.class));
    handler.getArtifactGroupIds(mock(FiltersHolder.class));
    verify(repositoryHandler, times(1)).getGroupIds(any(FiltersHolder.class));
}