engineN/system/Helpers/test_helper.php

<?php

/**
 * This file is part of CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

use CodeIgniter\Exceptions\TestException;
use CodeIgniter\Model;
use CodeIgniter\Test\Fabricator;
use Config\Services;

// CodeIgniter Test Helpers

if (! function_exists('fake')) {
    /**
     * Creates a single item using Fabricator.
     *
     * @param Model|object|string $model     Instance or name of the model
     * @param array|null          $overrides Overriding data to pass to Fabricator::setOverrides()
     * @param bool                $persist
     *
     * @return array|object
     */
    function fake($model, ?array $overrides = null, $persist = true)
    {
        $fabricator = new Fabricator($model);

        if ($overrides !== null) {
            $fabricator->setOverrides($overrides);
        }

        if ($persist) {
            return $fabricator->create();
        }

        return $fabricator->make();
    }
}

if (! function_exists('mock')) {
    /**
     * Used within our test suite to mock certain system tools.
     *
     * @param string $className Fully qualified class name
     *
     * @return object
     */
    function mock(string $className)
    {
        $mockClass   = $className::$mockClass;
        $mockService = $className::$mockServiceName ?? '';

        if (empty($mockClass) || ! class_exists($mockClass)) {
            throw TestException::forInvalidMockClass($mockClass);
        }

        $mock = new $mockClass();

        if (! empty($mockService)) {
            Services::injectMock($mockService, $mock);
        }

        return $mock;
    }
}