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More experimental step functions: stepwax, stepwane, steptaper, steptour and taperlist (#1042)

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* group tactus-oriented functions
* add stepwax, stepwane, steptaper and steptour
* taperlist
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Alex McLean 2024-04-08 09:46:18 +01:00 • committed by GitHub
parent 558e9e36ff
commit ebeefc0ac4
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2 changed files with 276 additions and 142 deletions
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24
packages/core/test/pattern.test.mjs
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@ -1138,4 +1138,28 @@ describe('Pattern', () => {
);
});
});
describe('steptaper', () => {
it('can taper', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).steptaper(1, 5), sequence(0, 1, 2, 3, 4, 0, 1, 2, 3, 0, 1, 2, 0, 1, 0)));
});
it('can taper backwards', () => {
expect(
sameFirst(sequence(0, 1, 2, 3, 4).steptaper(-1, 5), sequence(0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4)),
);
});
});
describe('wax and wane, left', () => {
it('can wax from the left', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwax(2), sequence(0, 1)));
});
it('can wane to the left', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwane(2), sequence(0, 1, 2)));
});
it('can wax from the right', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwax(-2), sequence(3, 4)));
});
it('can wane to the right', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwane(-2), sequence(2, 3, 4)));
});
});
});