def test_verify_duplication_not_return_list(self):
        list_links = ['/media/css/reset.css','/media/css2/reset.css','/media/folder/css/reset.css','reset_ohter2.css',]

        links = '''<link rel="stylesheet" href="/media/css/reset.css" />'''
        
        mjn = MediaJoinNode('None','None')
        list_duplicated = mjn._verify_duplication(list_links)
        
        assert len(list_duplicated) == 0
    def test_verify_duplication_return_correct_msg(self):
        list_links = ['/media/css/reset.css','/media/css/reset.css','/media/css/reset.css','/media/css/reset.css',]

        links = '''<link rel="stylesheet" href="/media/css/reset.css" />'''
        
        mjn = MediaJoinNode('None','None')
        list_duplicated = mjn._verify_duplication(list_links)
        
        assert len(list_duplicated) > 0
        assert list_duplicated[0] == '"/media/css/reset.css" is duplicate. It appears 4 times'