habitica/test/helpers/translate.js

import i18n from '../../website/common/script/i18n';
import { translations } from '../../website/server/libs/i18n';

i18n.translations = translations;

const STRING_ERROR_MSG = 'Error processing the string. Please see Help > Report a Bug.';
const STRING_DOES_NOT_EXIST_MSG = /^String '.*' not found.$/;

// Use this to verify error messages returned by the server
// That way, if the translated string changes, the test
// will not break. NOTE: it checks against errors with string as well.
export function translate (key, variables, language) {
  const translatedString = i18n.t(key, variables, language);

  expect(translatedString).to.not.be.empty;
  expect(translatedString).to.not.eql(STRING_ERROR_MSG);
  expect(translatedString).to.not.match(STRING_DOES_NOT_EXIST_MSG);

  return translatedString;
}

export function translationCheck (translatedString) {
  expect(translatedString).to.not.be.empty;
  expect(translatedString).to.not.eql(STRING_ERROR_MSG);
  expect(translatedString).to.not.match(STRING_DOES_NOT_EXIST_MSG);
}