def METHOD_NAME():
    target = 'classBackgroundLayer('
    should_match = 'class BackgroundLayer(cocos.layer.Layer)'
    filling = '\n'.join([
        'this is a line',
        'this is another'
        ])
    text = should_match + '\n' + filling
    lines = text.split('\n')
    it = enumerate(lines)
    start_line = get_start_line(it, target)
    assert start_line == 0
    assert six.next(it) == (1, lines[1])