khodowany
128 lines
7.5 KiB
Python
128 lines
7.5 KiB
Python
import argparse
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import copy
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from fractions import Fraction
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from pathlib import Path
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import tempfile
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import unittest
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from generator import harmony
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from generator.__main__ import generate_assets
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from generator.arrange.generate import active_chord, arrange_document, generated_voice, propagated_chords
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from generator.arrange.fretboard import pitches_for_voicing
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from generator.model import beat_lengths, fraction, key_from_fifths, pitch_number, rational, validate_document
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from generator.musicxml import load_musicxml
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from generator.styles import BUILT_IN_STYLES, canonical_style
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from generator.transposition import concert_document, shift_pitch, transpose_document
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from tests.test_musicxml import parse, notes, xml_note, xml_score
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class MusicModelTests(unittest.TestCase):
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def test_chord_semantics_are_not_voicing_heuristics(self):
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cases = {'C': {0, 4, 7}, 'Cdim': {0, 3, 6}, 'Cdim7': {0, 3, 6, 9}, 'Csus2': {0, 2, 7},
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'C7b5': {0, 4, 6, 10}, 'G7b9': {7, 11, 2, 5, 8}, 'Fmaj7#11': {5, 9, 0, 4, 11}}
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for label, expected in cases.items():
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self.assertEqual(set(harmony.pitch_classes(harmony.parse_symbol(label))), expected, label)
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for label, essentials in [('G7b9', {11, 5, 8}), ('C13', {4, 10, 9})]:
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pitches = pitches_for_voicing(label)
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self.assertTrue(essentials.issubset({pitch_number(p) % 12 for p in pitches}), label)
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with self.assertRaises(ValueError):
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harmony.parse_symbol('Cunrecognised')
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def test_transposition_preserves_spelling_octaves_modes(self):
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for p in ({'letter': 'b', 'alter': 1, 'octave': 4}, {'letter': 'c', 'alter': -1, 'octave': 4}, {'letter': 'f', 'alter': 2, 'octave': 4}):
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self.assertEqual(shift_pitch(p, 0, 0), p)
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self.assertEqual(pitch_number(shift_pitch(p, 1, 2)), pitch_number(p) + 2)
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source = parse(xml_score(xml_note(), attributes='<key><fifths>-3</fifths><mode>minor</mode></key>'))
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result = transpose_document(source, 'D')
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self.assertEqual(result['metadata']['key_signature'], 'D minor')
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self.assertEqual(result['metadata']['key']['alterations'], key_from_fifths(-1, 'minor')['alterations'])
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def test_additive_and_compound_grouping(self):
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self.assertEqual(beat_lengths({'groups': [{'beats': [3, 2], 'unit': 8}]}), [Fraction(3, 2), Fraction(1)])
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self.assertEqual(beat_lengths({'groups': [{'beats': [6], 'unit': 8}]}), [Fraction(3, 2)] * 2)
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self.assertEqual(beat_lengths({'groups': [{'beats': [3], 'unit': 4}]}), [Fraction(1)] * 3)
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def test_generated_rhythm_follows_mid_measure_meter(self):
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change = '<attributes><time><beats>6</beats><beat-type>8</beat-type></time></attributes>'
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source = parse(xml_score(xml_note(duration=1, kind='quarter') + change + xml_note(duration=3, kind='half', extra='<dot/>')))
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measure = source['staves'][0]['measures'][0]
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events = generated_voice(measure, 'slash', None)
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self.assertEqual([fraction(n['onset']) for n in events], [0, 1, Fraction(5, 2)])
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self.assertEqual([fraction(n['duration']) for n in events], [1, Fraction(3, 2), Fraction(3, 2)])
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def test_harmony_carry_uses_last_event_and_never_future_event(self):
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c = harmony.parse_symbol('C7') | {'onset': rational(0)}
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f = harmony.parse_symbol('F7') | {'onset': rational(2)}
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measures = [{'harmonies': [c, f]}, {'harmonies': []}]
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self.assertEqual(propagated_chords(measures), [None, f])
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self.assertIsNone(active_chord({'harmonies': [f]}, Fraction(0), None))
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self.assertEqual(active_chord(measures[0], Fraction(1), None), c)
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def test_tuplet_ratios_and_tie_links_validated(self):
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document = parse(xml_score(xml_note()))
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notes(document)[0]['pitches'][0]['tie_to'] = 'missing'
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with self.assertRaisesRegex(ValueError, 'dangling tie'):
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validate_document(document)
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document = parse(xml_score(xml_note()))
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notes(document)[0]['duration'] = {'numerator': 8, 'denominator': 2}
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with self.assertRaisesRegex(ValueError, 'reduced'):
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validate_document(document)
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def test_optional_turnaround_and_form(self):
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source = load_musicxml(Path('data/songs/it-could-happen-to-you.xml'))
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for part in ('acoustic', 'electric', 'vocal'):
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result = arrange_document(source, part)
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validate_document(result)
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measures = result['staves'][0]['measures']
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self.assertEqual(sum(bool(m.get('section_label')) for m in measures), 7)
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self.assertFalse(measures[-1]['harmonies'])
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self.assertTrue(any(h for m in measures[:-1] for h in m['harmonies']))
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self.assertFalse(any('chord_optional' in h for m in measures for h in m['harmonies']))
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def test_player_styles_preserved(self):
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self.assertEqual(len(BUILT_IN_STYLES), 50)
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for text in ('Med.', 'Med. Swing', 'Medium', 'Medium Swing'):
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self.assertEqual(canonical_style(text), 'Medium Swing')
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with self.assertRaises(ValueError):
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canonical_style('Unrecognised style')
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def test_failure_preserves_generated_assets(self):
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with tempfile.TemporaryDirectory() as temp:
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root = Path(temp)
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data = root / 'data'
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(data / 'songs').mkdir(parents=True)
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(data / 'songs' / 'bad.xml').write_text(xml_score(xml_note(duration=5)), encoding='utf-8')
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output = root / 'output'
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output.mkdir()
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(output / 'last-good').write_text('preserved')
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args = argparse.Namespace(data_dir=data, output_dir=output, static_assets_dir=Path('package/assets'), clean=True, check=False)
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with self.assertRaises(ValueError):
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generate_assets(args)
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self.assertEqual((output / 'last-good').read_text(), 'preserved')
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(data / 'songs' / 'bad.xml').write_text(xml_score(xml_note()), encoding='utf-8')
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args.check = True
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with self.assertRaisesRegex(ValueError, 'summary'):
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generate_assets(args)
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self.assertEqual((output / 'last-good').read_text(), 'preserved')
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def test_instrument_transposition_is_converted_once(self):
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source = parse(xml_score(xml_note(), attributes='<transpose><diatonic>-1</diatonic><chromatic>-2</chromatic></transpose>'))
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concert = concert_document(source)
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p = notes(concert)[0]['pitches'][0]
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self.assertEqual((p['letter'], p['alter'], p['octave']), ('b', -1, 3))
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self.assertEqual(concert_document(concert), concert)
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self.assertEqual(concert['metadata']['key_signature'], 'Bb')
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def test_deterministic_generation_and_removal(self):
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with tempfile.TemporaryDirectory() as temp:
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data, output = Path(temp) / 'data', Path(temp) / 'output'
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(data / 'songs').mkdir(parents=True)
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source = data / 'songs' / 'fixture.xml'
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source.write_text(xml_score(xml_note()), encoding='utf-8')
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args = argparse.Namespace(data_dir=data, output_dir=output, static_assets_dir=Path('package/assets'), clean=True, check=False)
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generate_assets(args)
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first = {p.relative_to(output): p.read_bytes() for p in output.rglob('*') if p.is_file()}
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generate_assets(args)
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self.assertEqual(first, {p.relative_to(output): p.read_bytes() for p in output.rglob('*') if p.is_file()})
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source.unlink()
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generate_assets(args)
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self.assertFalse(list(output.rglob('*.json')))
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def test_pickup_tie_survives_vocal_restoration(self):
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source = xml_score(xml_note(duration=1, kind='quarter', extra='<tie type="start"/>'), implicit=True)
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source = source.replace('</measure></part>', '</measure><measure number="2">' + xml_note(extra='<tie type="stop"/>') + '</measure></part>')
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result = arrange_document(parse(source), 'vocal')
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validate_document(result)
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measures = result['staves'][0]['measures']
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start = measures[0]['voices'][0]['notes'][-1]['pitches'][0]
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end = measures[1]['voices'][0]['notes'][0]['pitches'][0]
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self.assertEqual(start['tie_to'], end['id'])
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