ember-intl/dist/test-support.js

Internationalization for Ember projects

import { getContext, settled } from '@ember/test-helpers';

/**
 * Updates the translations as if you had somehow added them (e.g.
 * via lazy loading).
 *
 * @function addTranslations
 * @param {string} locale
 * @param {object} translations
 */
async function addTranslations(locale, translations) {
  const {
    owner
  } = getContext();
  const intl = owner.lookup('service:intl');
  intl.addTranslations(locale, translations);
  await settled();
}

/**
 * Updates the locale as if the user had changed their preferred language.
 *
 * @function setLocale
 * @param {string} locale
 */
async function setLocale(locale) {
  const {
    owner
  } = getContext();
  const intl = owner.lookup('service:intl');
  intl.setLocale(locale);
  await settled();
}

/**
 * In addition to the `hooks` object, you must specify the locale
 * under which your tests make sense.
 *
 * You may pass a `translations` object to stub the translations.
 *
 * @param {object} hooks
 * @param {string} locale
 * @param {object} [translations]
 */
function setupIntl(hooks, locale, translations) {
  hooks.beforeEach(async function () {
    const {
      owner
    } = getContext();
    const intl = owner.lookup('service:intl');
    intl.setLocale(locale);
    intl.setOnMissingTranslation(key => `t:${key}`);
    if (translations) {
      await addTranslations(locale, translations);
    } else {
      await settled();
    }
  });
}

/**
 * Invokes the `t` method of the `intl` service.
 *
 * @function t
 * @param {string} key
 * @param {object} [options]
 * @return {string}
 */
function t(key, options) {
  const {
    owner
  } = getContext();
  const intl = owner.lookup('service:intl');
  return intl.t(key, options);
}

export { addTranslations, setLocale, setupIntl, t };
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