import mutagen

from symuid._tag_interface import MP4

# pylint: disable=protected-access


def test_set_comment(empty_mp4_path):
    iface = MP4(mutagen.File(empty_mp4_path))
    assert iface.get_comment() is None
    iface.set_comment('latin')
    assert iface.get_comment() == 'latin'
    iface.set_comment('mp4 你好')
    assert iface.get_comment() == 'mp4 你好'
    iface.save()
    iface_reread = MP4(mutagen.File(empty_mp4_path))
    assert iface_reread.get_comment() == 'mp4 你好'
    tags = mutagen.File(iface.track_path).tags
    assert len(tags) == 1
    assert tags.items()[0] == ('©cmt', ['mp4 你好'])