ms.macro/src/ms.macro.test.js

Convert various time formats to milliseconds at build time in Babel.

import test from 'ava';
import macroPlugin from 'babel-plugin-macros';
import { transform } from 'babel-core';
import { stripIndent } from 'common-tags';

const run = code => transform(code, {
  babelrc: false,
  plugins: [macroPlugin],
  filename: __filename,
}).code.trim();

{
  const expected = stripIndent`
    const ONE_DAY = 86400000;
    const TWO_DAYS = 172800000;
  `;

  test('CallExpression', (t) => {
    const input = stripIndent`
      import ms from './ms.macro';
      const ONE_DAY = ms('1 day');
      const TWO_DAYS = ms('2 days');
    `;
    const output = run(input);
    t.is(output, expected);
  });

  test('TaggedTemplateExpression', (t) => {
    const input = stripIndent`
      import ms from './ms.macro';
      const ONE_DAY = ms\`1 day\`;
      const TWO_DAYS = ms\`2 days\`;
    `;
    const output = run(input);
    t.is(output, expected);
  });
}

test('CallExpression Error', (t) => {
  const input = stripIndent`
    import ms from './ms.macro';
    const ONE_DAY = ms('1 da');
  `;
  const error = t.throws(() => run(input));
  t.is(error.message, `${__filename}: Invalid input given to ms.macro at line 2`);
});

test('Use ms and ms.macro together', (t) => {
  const input = stripIndent`
    import ms from 'ms';
    import msm from './ms.macro';
    const ONE_DAY = msm('1 day');
    const str = ms(172800000);
  `;
  const expected = stripIndent`
    import ms from 'ms';

    const ONE_DAY = 86400000;
    const str = ms(172800000);
  `;
  const output = run(input);
  t.is(output, expected);
});