frontend/tests/functional/_bootstrap.php

<?php
    /**
     * Here you can initialize variables via \Codeception\Util\Fixtures class
     * to store data in global array and use it in Cests.
     *
     * ```php
     * // Here _bootstrap.php
     * \Codeception\Util\Fixtures::add('user1', ['name' => 'davert']);
     * ```
     *
     * In Cests
     *
     * ```php
     * \Codeception\Util\Fixtures::get('user1');
     * ```
     */