move tonleiter

packages/tonal/test/tonleiter.test.mjs

@@ -0,0 +1,112 @@
+/*
+tonleiter.test.mjs - <short description TODO>
+Copyright (C) 2022 Strudel contributors - see <https://github.com/tidalcycles/strudel/blob/main/packages/tonal/test/tonleiter.test.mjs>
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { describe, test, expect } from 'vitest';
+import {
+  Step,
+  Note,
+  transpose,
+  pc2chroma,
+  rotateChroma,
+  chroma2pc,
+  tokenizeChord,
+  note2pc,
+  note2oct,
+  note2midi,
+  midi2note,
+  voiceBelow,
+} from '../tonleiter.mjs';
+
+describe('tonleiter', () => {
+  test('Step ', () => {
+    expect(Step.tokenize('#11')).toEqual(['#', 11]);
+    expect(Step.tokenize('b13')).toEqual(['b', 13]);
+    expect(Step.tokenize('bb6')).toEqual(['bb', 6]);
+    expect(Step.tokenize('b3')).toEqual(['b', 3]);
+    expect(Step.tokenize('3')).toEqual(['', 3]);
+    expect(Step.tokenize('10')).toEqual(['', 10]);
+    // expect(Step.tokenize('asdasd')).toThrow();
+    expect(Step.accidentals('b3')).toEqual(-1);
+    expect(Step.accidentals('#11')).toEqual(1);
+  });
+  test('Note', () => {
+    expect(Note.tokenize('C##')).toEqual(['C', '##']);
+    expect(Note.tokenize('Bb')).toEqual(['B', 'b']);
+    expect(Note.accidentals('C#')).toEqual(1);
+    expect(Note.accidentals('C##')).toEqual(2);
+    expect(Note.accidentals('Eb')).toEqual(-1);
+    expect(Note.accidentals('Bbb')).toEqual(-2);
+  });
+  test('transpose', () => {
+    expect(transpose('F#', '3')).toEqual('A#');
+    expect(transpose('C', '3')).toEqual('E');
+    expect(transpose('D', '3')).toEqual('F#');
+    expect(transpose('E', '3')).toEqual('G#');
+    expect(transpose('Eb', '3')).toEqual('G');
+    expect(transpose('Ebb', '3')).toEqual('Gb');
+  });
+  test('pc2chroma', () => {
+    expect(pc2chroma('C')).toBe(0);
+    expect(pc2chroma('C#')).toBe(1);
+    expect(pc2chroma('C##')).toBe(2);
+    expect(pc2chroma('D')).toBe(2);
+    expect(pc2chroma('Db')).toBe(1);
+    expect(pc2chroma('Dbb')).toBe(0);
+  });
+  test('rotateChroma', () => {
+    expect(rotateChroma(0, 1)).toBe(1);
+    expect(rotateChroma(0, -1)).toBe(-1); // this is wrong...
+    //expect(rotateChroma(0, -1)).toBe(11); // <-- TODO
+    expect(rotateChroma(11, 1)).toBe(0);
+    expect(rotateChroma(11, 13)).toBe(0);
+  });
+  test('chroma2pc', () => {
+    expect(chroma2pc(0)).toBe('C');
+    expect(chroma2pc(1)).toBe('Db');
+    expect(chroma2pc(1, true)).toBe('C#');
+    expect(chroma2pc(2)).toBe('D');
+    expect(chroma2pc(3)).toBe('Eb');
+  });
+  test('tokenizeChord', () => {
+    expect(tokenizeChord('Cm7')).toEqual(['C', 'm7', undefined]);
+    expect(tokenizeChord('C#m7')).toEqual(['C#', 'm7', undefined]);
+    expect(tokenizeChord('Bb^7')).toEqual(['Bb', '^7', undefined]);
+    expect(tokenizeChord('Bb^7/F')).toEqual(['Bb', '^7', 'F']);
+  });
+  test('note2pc', () => {
+    expect(note2pc('C5')).toBe('C');
+    // expect(note2pc('C52')).toBe('C'); // <- 2 digits fail
+    expect(note2pc('Bb3')).toBe('Bb');
+  });
+  test('note2oct', () => {
+    expect(note2oct('C5')).toBe(5);
+    expect(note2oct('Bb3')).toBe(3);
+    expect(note2oct('C7')).toBe(7);
+    //expect(note2oct('C10')).toBe(10); // <- 2 digits fail
+  });
+  test('note2midi', () => {
+    expect(note2midi('C4')).toBe(60);
+    expect(note2midi('C#4')).toBe(61);
+    expect(note2midi('Cb4')).toBe(59);
+    expect(note2midi('Bb3')).toBe(58);
+    // expect(note2midi('C10')).toBe(58); // <- 2 digits fail
+  });
+  test('midi2note', () => {
+    expect(midi2note(60)).toBe('C4');
+    expect(midi2note(61)).toBe('Db4');
+    expect(midi2note(61, true)).toBe('C#4');
+  });
+  test('voiceBelow', () => {
+    const voicingDictionary = {
+      m7: [
+        '3 7 10 14', // b3 5 b7 9
+        '10 14 5 19', // b7 9 b3 5
+      ],
+    };
+    expect(voiceBelow('Bb4', 'Em7', voicingDictionary)).toEqual(['G3', 'B3', 'D4', 'Gb4']);
+    expect(voiceBelow('D5', 'Cm7', voicingDictionary)).toEqual(['Eb4', 'G4', 'Bb4', 'D5']);
+  });
+});