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test fromMidi + getFrequency

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This commit is contained in:
Felix Roos 2022-04-16 21:34:19 +02:00
parent 1b35dd0c55
commit a638f9505f
1 changed files with 17 additions and 1 deletions
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18
packages/core/test/util.test.mjs
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@ -1,5 +1,6 @@
import { strict as assert } from 'assert';
import { isNote, tokenizeNote, toMidi, mod, compose } from '../util.mjs';
import { pure } from '../pattern.mjs';
import { isNote, tokenizeNote, toMidi, fromMidi, mod, compose, getFrequency } from '../util.mjs';
describe('isNote', () => {
it('should recognize notes without accidentals', () => {
@ -64,6 +65,21 @@ describe('toMidi', () => {
assert.equal(toMidi('C##3'), 50);
});
});
describe('fromMidi', () => {
it('should turn midi into frequency', () => {
assert.equal(fromMidi(69), 440);
assert.equal(fromMidi(57), 220);
});
});
describe('getFrequency', () => {
it('should turn midi into frequency', () => {
const happify = (val, context = {}) => pure(val).firstCycle()[0].setContext(context);
assert.equal(getFrequency(happify('a4')), 440);
assert.equal(getFrequency(happify('a3')), 220);
assert.equal(getFrequency(happify(440, { type: 'frequency' })), 440); // TODO: migrate when values are objects..
assert.equal(getFrequency(happify(432, { type: 'frequency' })), 432);
});
});
describe('mod', () => {
it('should work like regular modulo with positive numbers', () => {