def test_chord_created_using_wrong_data_types(self):
# try to create chord object using different argument types
with self.assertRaises(TypeError):
c_chord = Chord(1, 2, 3, 4)
with self.assertRaises(TypeError):
c_chord = Chord("w", "x", "y", "z")
def test_chord_created_using_strings(self):
# chord object should be able to handle proper strings as arguments
# should just try - Note(given_string) - not yet implemented
# create chord from given notes
c_chord = Chord("G'", "E'", "C'", "C,")
# check if chord consists of given notes
self.assertEqual(c_chord.soprano, "G'")
self.assertEqual(c_chord.alto, "E'")
self.assertEqual(c_chord.tenor, "C'")
self.assertEqual(c_chord.bass, "C,")
self.assertIs(type(c_chord.soprano), Note)
self.assertIs(type(c_chord.alto), Note)
self.assertIs(type(c_chord.tenor), Note)
self.assertIs(type(c_chord.bass), Note)
def test_chord_created_using_note_objects(self):
# create notes
soprano = Note("G'")
alto = Note("E'")
tenor = Note("C'")
bass = Note("C,")
# create chord from given notes
c_chord = Chord(soprano, alto, tenor, bass)
# check if chord consists of given notes
self.assertEqual(c_chord.soprano, soprano)
self.assertEqual(c_chord.alto, alto)
self.assertEqual(c_chord.tenor, tenor)
self.assertEqual(c_chord.bass, bass)
self.assertIs(type(c_chord.soprano), Note)
self.assertIs(type(c_chord.alto), Note)
self.assertIs(type(c_chord.tenor), Note)
self.assertIs(type(c_chord.bass), Note)
def test_chord_find_root_simple_septimal_chords(self):
# Major chords only (Dominant seventh chord)
# minor chords have a perfect fith between 3 and 7, which leads
# to multiple interpretations
a_septimal = Chord(Note("G'"), Note("C#'"), Note("E,"), Note("A,,"))
bb_septimal = Chord(Note("F'"), Note("D'"), Note("Ab,"), Note("Bb,,"))
b_septimal = Chord(Note("D#'"), Note("A,"), Note("F#,"), Note("B,,"))
a_septimal._read_chord()
bb_septimal._read_chord()
b_septimal._read_chord()
self.assertEqual(a_septimal.root, 9)
self.assertEqual(bb_septimal.root, 10)
self.assertEqual(b_septimal.root, 11)
def test_chord_find_root_simple_chords_inversions(self):
c_firs_inv = Chord(Note("C''"), Note("C'"), Note("G,"), Note("E,"))
d_sec_inv = Chord(Note("F#'"), Note("D'"), Note("D'"), Note("A,"))
e_min_first_inv = Chord(Note("E''"), Note("B'"), Note("E'"),
Note("G,"))
f_min_sec_inv = Chord(Note("F'"), Note("F'"), Note("Ab,"), Note("C,"))
c_firs_inv._read_chord()
d_sec_inv._read_chord()
e_min_first_inv._read_chord()
f_min_sec_inv._read_chord()
self.assertEqual(c_firs_inv.root, 0)
self.assertEqual(d_sec_inv.root, 2)
self.assertEqual(e_min_first_inv.root, 4)
self.assertEqual(f_min_sec_inv.root, 5)
def test_chord_find_root_simple_chords(self):
c_chord = Chord(Note("G'"), Note("E'"), Note("C'"), Note("C,"))
d_chord = Chord(Note("A'"), Note("F#'"), Note("D'"), Note("D,"))
e_min_chord = Chord(Note("B'"), Note("G'"), Note("E'"), Note("E,"))
f_min_chord = Chord(Note("C''"), Note("Ab'"), Note("F'"), Note("F,"))
c_chord._read_chord()
d_chord._read_chord()
e_min_chord._read_chord()
f_min_chord._read_chord()
self.assertEqual(c_chord.root, 0)
self.assertEqual(d_chord.root, 2)
self.assertEqual(e_min_chord.root, 4)
self.assertEqual(f_min_chord.root, 5)
def test_chord_find_root_incomplete_chords(self):
# 1 1 1 3 and 1 1 1 3> chords (should be recognized even if inverted)
f_min_1113 = Chord(Note("Ab'"), Note("F'"), Note("F,"), Note("F,,"))
g_major_1113 = Chord(Note("G'"), Note("B,"), Note("G,"), Note("G,,"))
a_major_1113_fi = Chord(Note("A'"), Note("A'"), Note("A,"),
Note("C#,"))
# 1 1 3 7 chord
db_major_1137 = Chord(Note("F'"), Note("Db'"), Note("Cb'"),
Note("Db,"))
db_major_1137_fi = Chord(Note("Db''"), Note("Db'"), Note("Cb'"),
Note("F,"))
db_major_1137_si = Chord(Note("Db''"), Note("F'"), Note("Db'"),
Note("Cb'"))
# 1 5 chord
fs_15 = Chord(Note("F#'"), Note("C#'"), Note("C#'"), Note("F#,"))
fs_15_inverted = Chord(Note("F#'"), Note("C#'"), Note("F#,"),
Note("C#,"))
# 1111 chord
db_1111 = Chord(Note("Db'"), Note("Db'"), Note("Db'"), Note("Db'"))
f_min_1113._read_chord()
g_major_1113._read_chord()
a_major_1113_fi._read_chord()
db_major_1137._read_chord()
db_major_1137_fi._read_chord()
db_major_1137_si._read_chord()
fs_15._read_chord()
fs_15_inverted._read_chord()
db_1111._read_chord()
self.assertEqual(f_min_1113.root, 5)
self.assertEqual(g_major_1113.root, 7)
self.assertEqual(a_major_1113_fi.root, 9)
self.assertEqual(db_major_1137.root, 1)
self.assertEqual(db_major_1137_fi.root, 1)
self.assertEqual(db_major_1137_si.root, 1)
self.assertEqual(fs_15.root, 6)
self.assertEqual(fs_15_inverted.root, 6)
self.assertEqual(db_1111.root, 1)
def test_chord_find_root_ninth_chords_inversions(self):
# Major chords only (Dominant ninth chords)
# Not yet implemented
f_maj_ninth_fi = Chord(Note("G'"), Note("Eb'"), Note("F,"),
Note("A,,"))
ab_min_ninth_fi = Chord(Note("Bbb'"), Note("Gb'"), Note("Ab,"),
Note("C,"))
b_maj_ninth_ti = Chord(Note("C#''"), Note("D#'"), Note("B,"),
Note("A,"))
ds_min_ninth_ti = Chord(Note("E''"), Note("F##'"), Note("D#'"),
Note("C#,"))
f_maj_ninth_fi._read_chord()
ab_min_ninth_fi._read_chord()
b_maj_ninth_ti._read_chord()
ds_min_ninth_ti._read_chord()
self.assertEqual(f_maj_ninth_fi.root, 5)
self.assertEqual(ab_min_ninth_fi.root, 8)
self.assertEqual(b_maj_ninth_ti.root, 11)
self.assertEqual(ds_min_ninth_ti.root, 3)
def test_chord_find_root_simple_ninth_chords(self):
# Major chords only (Dominant ninth chord - like in septimal chords)
c_major_ninth = Chord(Note("D''"), Note("E'"), Note("Bb,"), Note("C,"))
cs_minor_ninth = Chord(Note("E#'"), Note("D'"), Note("B,"),
Note("C#,"))
d_minor_ninth = Chord(Note("Eb'"), Note("C'"), Note("F#,"), Note("D,"))
eb_major_ninth = Chord(Note("Db''"), Note("F'"), Note("G,"),
Note("Eb,"))
c_major_ninth._read_chord()
cs_minor_ninth._read_chord()
d_minor_ninth._read_chord()
eb_major_ninth._read_chord()
self.assertEqual(c_major_ninth.root, 0)
self.assertEqual(cs_minor_ninth.root, 1)
self.assertEqual(d_minor_ninth.root, 2)
self.assertEqual(eb_major_ninth.root, 3)
def test_chord_find_root_septimal_chords_inversions(self):
# Major chords only (Dominant seventh chords)
fs_septimal_fi = Chord(Note("F#'"), Note("E'"), Note("C#'"),
Note("A#,"))
g_septimal_si = Chord(Note("F'"), Note("B,"), Note("G,"), Note("D,"))
ab_septimal_ti = Chord(Note("Eb'"), Note("C'"), Note("Ab,"),
Note("Gb,"))
fs_septimal_fi._read_chord()
g_septimal_si._read_chord()
ab_septimal_ti._read_chord()
self.assertEqual(fs_septimal_fi.root, 6)
self.assertEqual(g_septimal_si.root, 7)
self.assertEqual(ab_septimal_ti.root, 8)