yii2/apps/advanced/tests/codeception/frontend/acceptance/HomeCept.php

<?php
use codeception_frontend\AcceptanceTester;

$I = new AcceptanceTester($scenario);
$I->wantTo('ensure that home page works');
$I->amOnPage(Yii::$app->homeUrl);
$I->see('My Company');
$I->seeLink('About');
$I->click('About');
$I->see('This is the About page.');