aiexperiments-ai-duet/server/magenta/music/chord_symbols_lib_test.py

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2016-11-11 18:53:51 +00:00
# Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests for chord_symbols_lib."""
# internal imports
import tensorflow as tf
from magenta.music import chord_symbols_lib
CHORD_QUALITY_MAJOR = chord_symbols_lib.CHORD_QUALITY_MAJOR
CHORD_QUALITY_MINOR = chord_symbols_lib.CHORD_QUALITY_MINOR
CHORD_QUALITY_AUGMENTED = chord_symbols_lib.CHORD_QUALITY_AUGMENTED
CHORD_QUALITY_DIMINISHED = chord_symbols_lib.CHORD_QUALITY_DIMINISHED
CHORD_QUALITY_OTHER = chord_symbols_lib.CHORD_QUALITY_OTHER
class ChordSymbolFunctionsTest(tf.test.TestCase):
def setUp(self):
self.chord_symbol_functions = chord_symbols_lib.ChordSymbolFunctions.get()
def testTranspose(self):
# Test basic triads.
figure = self.chord_symbol_functions.transpose_chord_symbol('C', 2)
self.assertEqual('D', figure)
figure = self.chord_symbol_functions.transpose_chord_symbol('A-m', -3)
self.assertEqual('Fm', figure)
figure = self.chord_symbol_functions.transpose_chord_symbol('F#', 0)
self.assertEqual('F#', figure)
# Test more complex chords.
figure = self.chord_symbol_functions.transpose_chord_symbol('Co7', 7)
self.assertEqual('Go7', figure)
figure = self.chord_symbol_functions.transpose_chord_symbol('D+', -3)
self.assertEqual('B+', figure)
figure = self.chord_symbol_functions.transpose_chord_symbol('F-9/A-', 2)
self.assertEqual('G-9/B-', figure)
def testMidiPitches(self):
# Check that pitch classes are correct.
pitches = self.chord_symbol_functions.chord_symbol_midi_pitches('Am')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 4, 9]), pitch_classes)
pitches = self.chord_symbol_functions.chord_symbol_midi_pitches('D7b9')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 2, 3, 6, 9]), pitch_classes)
pitches = self.chord_symbol_functions.chord_symbol_midi_pitches('Fm7b5')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([3, 5, 8, 11]), pitch_classes)
# Check that bass notes are correct.
pitches = self.chord_symbol_functions.chord_symbol_midi_pitches('B-7')
bass_pitch_class = min(pitches) % 12
self.assertEqual(10, bass_pitch_class)
pitches = self.chord_symbol_functions.chord_symbol_midi_pitches('A/G')
bass_pitch_class = min(pitches) % 12
self.assertEqual(7, bass_pitch_class)
pitches = self.chord_symbol_functions.chord_symbol_midi_pitches('F#dim7')
bass_pitch_class = min(pitches) % 12
self.assertEqual(6, bass_pitch_class)
def testRoot(self):
root = self.chord_symbol_functions.chord_symbol_root('Dm9')
self.assertEqual(2, root)
root = self.chord_symbol_functions.chord_symbol_root('E/G#')
self.assertEqual(4, root)
root = self.chord_symbol_functions.chord_symbol_root('Bsus2')
self.assertEqual(11, root)
root = self.chord_symbol_functions.chord_symbol_root('A-maj7')
self.assertEqual(8, root)
def testQuality(self):
# Test major chords.
quality = self.chord_symbol_functions.chord_symbol_quality('B13')
self.assertEqual(CHORD_QUALITY_MAJOR, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('E7#9')
self.assertEqual(CHORD_QUALITY_MAJOR, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('Fadd2/E-')
self.assertEqual(CHORD_QUALITY_MAJOR, quality)
# Test minor chords.
quality = self.chord_symbol_functions.chord_symbol_quality('C#m9')
self.assertEqual(CHORD_QUALITY_MINOR, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('Gm7/B-')
self.assertEqual(CHORD_QUALITY_MINOR, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('C-mM7')
self.assertEqual(CHORD_QUALITY_MINOR, quality)
# Test augmented chords.
quality = self.chord_symbol_functions.chord_symbol_quality('D+/A#')
self.assertEqual(CHORD_QUALITY_AUGMENTED, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('Aaug')
self.assertEqual(CHORD_QUALITY_AUGMENTED, quality)
# Test diminished chords.
quality = self.chord_symbol_functions.chord_symbol_quality('Am7b5')
self.assertEqual(CHORD_QUALITY_DIMINISHED, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('Edim7')
self.assertEqual(CHORD_QUALITY_DIMINISHED, quality)
# Test other chords.
quality = self.chord_symbol_functions.chord_symbol_quality('G5')
self.assertEqual(CHORD_QUALITY_OTHER, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('B-sus2')
self.assertEqual(CHORD_QUALITY_OTHER, quality)
quality = self.chord_symbol_functions.chord_symbol_quality('Dsus')
self.assertEqual(CHORD_QUALITY_OTHER, quality)
if __name__ == '__main__':
tf.test.main()