def test_equals_identifies_equal_objects_with_pcs_only(self):
ts = ToneSystem(9)
mode1 = ModalGroup(ts, pcs=ts.get_pitch_class_set([1,2,4]))
mode2 = ModalGroup(ts, pcs=ts.get_pitch_class_set([1,3,4]))
self.assertEqual(mode1, mode2)
mode2 = ModalGroup(ts, pcs=ts.get_pitch_class_set([1,2,5]))
self.assertNotEqual(mode1, mode2)
def test_can_append_modal_group_to_empty_stream(self):
ts = ToneSystem(12, rand=NotReallyRand())
t = NoteStream(ts, [], group_length=3)
grp = ts.get_pitch_class_set([2,3,4,-1])
t = t.append(Link([grp]))
result = ts.get_pitch_class_set(t.notes)
self.assertEqual(ts.get_pitch_class_set([2,3,4,-1]), result)
def test_will_generate_notes_from_pcs(self):
ts = ToneSystem(13, rand=NotReallyRand())
expected = [1,2,4]
expected_pcs = ts.get_pitch_class_set(expected)
mode1 = ModalGroup(ts, pcs=expected_pcs)
notes = mode1.generate_notes([6])
self.assertEqual(expected_pcs, ts.get_pitch_class_set(notes))
self.assertEquals(6, notes[0])
def test_can_append_modal_group(self):
ts = ToneSystem(12, rand=NotReallyRand())
t = NoteStream(ts, [1,2,3,4], group_length=4)
grp = ts.get_pitch_class_set([2,3,4,-1])
t = t.append(Link([grp]))
print "Notes: ", t.notes
result = ts.get_pitch_class_set(t.notes)
self.assertEqual(ts.get_pitch_class_set([1,2,3,4,-1]), result)
def test_large_pcs_benchmark(self):
ts = ToneSystem(42, rand=NotReallyRand())
expected = [1,4,7,9,12,5,6,20,3,2,8,11]
expected_pcs = ts.get_pitch_class_set(expected)
mode1 = ModalGroup(ts, pcs=expected_pcs)
notes = mode1.generate_notes([5,24])
self.assertEqual(12, len(notes))
self.assertEqual(expected_pcs, ts.get_pitch_class_set(notes))
self.assertEquals(5, notes[0])
self.assertEquals(24, notes[1])
def test_will_not_allow_pcs_and_notes_to_be_specified(self):
ts = ToneSystem(23)
ok = False
try:
mode = ModalGroup(ts, pcs=ts.get_pitch_class_set([1,2,4]), \
notes=[1,2,4])
except:
ok = True
self.assertTrue(ok, 'should have thrown in the constructor')
def test_large_pcs_benchmark_with_only_2_notes_to_complete(self):
ts = ToneSystem(42, rand=NotReallyRand())
expected = [1,4,7,9,12,5,6,20,3,2,8,11]
expected_pcs = ts.get_pitch_class_set(expected)
mode1 = ModalGroup(ts, pcs=expected_pcs)
notes = mode1.generate_notes([5,24,6,7,8,9,10,11,12,13])
#TODO: should the pcs class has an add note method that returns
#a new object? That would help with large groups
self.assertEqual(12, len(notes))
self.assertEqual(expected_pcs, ts.get_pitch_class_set(notes))
self.assertEquals(5, notes[0])
self.assertEquals(24, notes[1])
def test_can_find_out_number_of_notes_from_number_of_intervals(self):
#The actual tone system doesn't really matter, it's just
#easier to generate a pcs using a tone system than by hand
ts = ToneSystem(9)
#First one by hand, then automate
pcs = ts.get_pitch_class_set([1,12,3,4,5])
result = ModalGroup.get_note_count_from_pcs(pcs)
self.assertEqual(5, result)
for i in range(1,40):
p = range(i, 41)
expected = len(p)
pcs = ts.get_pitch_class_set(p)
result = ModalGroup.get_note_count_from_pcs(pcs)
self.assertEqual(expected, result)