Function doTemplate

build-system/tasks/e2e/describes-e2e.js:459–505

* * @param {string} _name * @param {object} variant * @param {BrowserNameDef} browserName

(_name, variant, browserName)

     * @param {BrowserNameDef} browserName
     */
    function doTemplate(_name, variant, browserName) {
      const env = Object.create(variant);
      // @ts-ignore
      this.timeout(TEST_TIMEOUT);
      beforeEach(async function () {
        this.timeout(SETUP_TIMEOUT);
        configureHelpers(env);
        await fixture.setup(env, browserName, SETUP_RETRIES);

        // don't install for CI
        if (!isCiBuild()) {
          installRepl(global, env);
        }
      });

      afterEach(async function () {
        if (argv.coverage) {
          await updateCoverage(env);
        }

        // If there is an async expect error, throw it in the final state.
        const lastExpectError = getLastExpectError();
        if (lastExpectError) {
          /** @type {any} */ (this.test).error(lastExpectError);
          clearLastExpectError();
        }

        await fixture.teardown(env);
        for (const key in env) {
          delete env[key];
        }

        if (!isCiBuild()) {
          uninstallRepl();
        }
      });

      after(async () => {
        if (argv.coverage) {
          await reportCoverage();
        }
      });

      describe(SUB, function () {
        fn.call(this, env);
      });
    }
  };

  /**