Function templateFunc

build-system/tasks/e2e/describes-e2e.js:381–506

(suiteName, spec, fn, describeFunc)

   */
  const templateFunc = function (suiteName, spec, fn, describeFunc) {
    const fixture = factory(spec);
    let environments = spec.environments || 'ampdoc-preset';
    if (typeof environments === 'string') {
      environments = envPresets[environments];
    }
    if (!environments) {
      throw new Error('Invalid environment preset: ' + spec.environments);
    }
    const variants = Object.create(null);
    environments.forEach((environment) => {
      const o = EnvironmentVariantMap[environment];
      variants[o.name] = o.value;
    });

    // Use chrome as default if no browser is specified
    if (!Array.isArray(spec.browsers)) {
      spec.browsers = ['chrome'];
    }

    /**
     * Initializes the describe object for all applicable browsers.
     */
    function createBrowserDescribe() {
      const allowedBrowsers = getAllowedBrowsers();
      spec.browsers
        .filter((x) => allowedBrowsers.has(x))
        .forEach((browserName) => {
          describe(browserName, function () {
            createVariantDescribe(browserName);
          });
        });
    }

    /**
     * @return {Set<string>}
     */
    function getAllowedBrowsers() {
      const {browsers} = getConfig();

      const allowedBrowsers = browsers
        ? new Set(browsers.split(',').map((x) => x.trim()))
        : supportedBrowsers;

      if (process.platform !== 'darwin' && allowedBrowsers.has('safari')) {
        // silently skip safari tests
        allowedBrowsers.delete('safari');
      }

      return allowedBrowsers;
    }

    /**
     * @param {BrowserNameDef} browserName
     */
    function createVariantDescribe(browserName) {
      for (const name in variants) {
        it.configure = function () {