def test_song(self):
original = dedent("""\
Τα μπλε παράθυρά σου
Bm Bm F# Bm | 4x
D
Περνούσα και σ' αντίκρυζα ψηλά στα παραθύρια | 2x
Em
και τότες πια καμάρωνα τα δυο σου μαύρα φρύδια
Em F# Bm
και τότες πια καμάρωνα τα δυο σου μαύρα φρύδια
""")
one_up = dedent("""\
Τα μπλε παράθυρά σου
Cm Cm G Cm | 4x
D#
Περνούσα και σ' αντίκρυζα ψηλά στα παραθύρια | 2x
Fm
και τότες πια καμάρωνα τα δυο σου μαύρα φρύδια
Fm G Cm
και τότες πια καμάρωνα τα δυο σου μαύρα φρύδια
""")
transposed = transpose(original, 1)
assert transposed == one_up
def get(cls, slug, semitones=None, root=None, unicode=False):
"""Load a song from file and optionally transpose it.
Args:
slug: The song's slug.
semitones: Transpose song by given semitones.
root: Transpose song to the given root.
unicode: Use unicode sharps and flats in the song's body.
"""
song = cls.fromfile(filename=slug)
if semitones is not None:
song.scale = transpose(song.scale, semitones)
song.body = transpose(song.body, semitones)
elif root is not None:
root = re.sub('s', '#', root)
old_root = song.scale[0:2].strip()
song.scale = transpose_to_root(song.scale, old_root, root)
song.body = transpose_to_root(song.body, old_root, root)
song.root = root
if unicode:
song.scale = to_unicode(song.scale)
song.body = to_unicode(song.body)
return song
def test_untransposable(self):
# Currently doesn't work for a song with both sharps and flats
original = "A# Bb"
with pytest.raises(ValueError):
transpose(original, 1)
def test_transpose_flats(self, semitones, expected):
assert transpose('AAA Ab Ddim Db7', semitones) == expected
def test_transpose_sharps(self, semitones, expected):
assert transpose('AAA G# Ddim C#7', semitones) == expected