avocado/packages/math/test/math.js

import {expect} from 'chai';

import {angleFromRad, HALF_PI, PI} from '../src/math';

it('can translate radians into degrees', () => {
  expect(angleFromRad(0)).to.equal(90);
  expect(angleFromRad(HALF_PI)).to.equal(0);
  expect(angleFromRad(PI)).to.equal(270);
  expect(angleFromRad(PI + HALF_PI)).to.equal(180);
  expect(angleFromRad(2 * PI)).to.equal(90);
});