def test_empty_list(self) -> None:
"""Test when the input list is empty."""
self.assertEqual(musical_hash.get_scale([]), 0x0,
'Scale should have no notes.')
def test_invalid_notes(self) -> None:
"""Test when the input list contains invalid notes."""
with self.assertRaises(ValueError):
musical_hash.get_scale(['A', 'Foo', 'Bar'])
def test_twelve_notes(self) -> None:
"""Test when the input list has twelve elements."""
self.assertEqual(
musical_hash.get_scale([
'A', '#A', 'B', 'C', '#C', 'D', '#D', 'E', 'F', '#F', 'G', '#G'
]), 0xfff, 'Scale should contain all notes.')
def test_duplicate_notes(self) -> None:
"""Test when the input list has duplicate notes."""
self.assertEqual(musical_hash.get_scale(['A', '#A', 'bB', 'C', 'C']),
0x00b, 'Duplicate notes should be handled.')
def test_one_note(self) -> None:
"""Test when the input list has one element."""
self.assertEqual(musical_hash.get_scale(['A']), 0x1,
'Scale should only have an A')