def test_chapter_lang_not_exists(): assert chapter_lang_exists('en', '2019', 'random') is False
def test_chapter_lang_exists(): assert chapter_lang_exists('en', '2019', 'css') is True
def test_chapter_lang_not_exists(): assert chapter_lang_exists('en', '2019', 'random') is False
def test_chapter_lang_exists(): assert chapter_lang_exists('en', '2019', 'css') is True