def test_get_loved_tracks_list(self):
        """Method testing get_loved_tracks method which retrives loved tracks for a given user
        and creates a list of dictionaries."""
        user = lastfm.get_lastfm_user(properties.LASTFM_TEST_USERNAME,
                                      properties.LASTFM_TEST_PASSWORD)
        loved_tracks_list = lastfm.get_loved_tracks_list(user)

        expected_output = [{'artist': 'Freddy The Flying Dutchman & The Sistina Band',
                            'title': 'Wojtyla Disco Dance'},
                           {'artist': 'Desire', 'title': 'Under Your Spell'}]

        for output in expected_output:
            self.assertTrue(output in loved_tracks_list)
    def test_get_loved_tracks_list(self):
        """Method testing get_loved_tracks method which retrives loved tracks for a given user
        and creates a list of dictionaries."""
        user = lastfm.get_lastfm_user(properties.LASTFM_TEST_USERNAME,
                                      properties.LASTFM_TEST_PASSWORD)
        loved_tracks_list = lastfm.get_loved_tracks_list(user)

        expected_output = [{
            'artist': 'Freddy The Flying Dutchman & The Sistina Band',
            'title': 'Wojtyla Disco Dance'
        }, {
            'artist': 'Desire',
            'title': 'Under Your Spell'
        }]

        for output in expected_output:
            self.assertTrue(output in loved_tracks_list)
def extract_variables():
    """Method that extracts variables given as arguments when running the script
    and returns:
    - loved_tracks (list of dictionaries - read the doc of
    lastfm.get_loved_tracks_list method for further information)
    - spotify_username (given as argument)
    - playlist_name (given as argument)
    """
    try:
        lastfm_user = lastfm.get_lastfm_user(sys.argv[1], sys.argv[2])
    except lastfm.WrongCredentialsException:
        print('Wrong LastFM credentials.')  # GUI => dialog window
        input('Press any key.')
        return

    loved_tracks = lastfm.get_loved_tracks_list(lastfm_user)
    spotify_username = sys.argv[3]
    playlist_name = sys.argv[4]

    return loved_tracks, spotify_username, playlist_name