frontend/test-mocha/common/util/parse_aspect_ratio_test.js

import assert from 'assert';

import parseAspectRatio from '../../../src/common/util/parse-aspect-ratio.js';

describe('parseAspectRatio', () => {
  const ratio16by9 = { w: 16, h: 9 };
  const ratio178 = { w: 1.78, h: 1 };

  it('Parses 16x9', () => {
    const r = parseAspectRatio('16x9');
    assert.deepEqual(r, ratio16by9);
  });

  it('Parses 16:9', () => {
    const r = parseAspectRatio('16:9');
    assert.deepEqual(r, ratio16by9);
  });

  it('Parses 1.78x1', () => {
    const r = parseAspectRatio('1.78x1');
    assert.deepEqual(r, ratio178);
  });

  it('Parses 1.78:1', () => {
    const r = parseAspectRatio('1.78:1');
    assert.deepEqual(r, ratio178);
  });

  it('Parses 1.78', () => {
    const r = parseAspectRatio('1.78');
    assert.deepEqual(r, ratio178);
  });

  it('Skips null states', () => {
    const r = parseAspectRatio(null);
    assert.equal(r, null);
  });

  it('Skips empty states', () => {
    const r = parseAspectRatio('   ');
    assert.equal(r, null);
  });

  it('Skips invalid input', () => {
    const r = parseAspectRatio('mary had a little lamb');
    assert.equal(r, null);
  });

  it('Skips invalid, but close input', () => {
    const r = parseAspectRatio('mary:lamb');
    assert.equal(r, null);
  });
});