Non-Code Namespaces (Yii2)

Question

Im using Codeception in Yii2 to accept acceptance tests and there is no way to access my models because namespaces do not work in these tests.

I have it in my tests /_bootstrap.php

 require(__DIR__ . '/../vendor/autoload.php');
 require(__DIR__ . '/../vendor/yiisoft/yii2/Yii.php');

 $config = require(__DIR__ . '/../console/config/main.php');
 //
 $application = new yii\console\Application( $config );

 ## Added (@vitalik_74)
 Yii::setAlias('@tests', dirname(__DIR__));

This is in my console / config / main

 <?php
 $params = array_merge(
     require(__DIR__ . '/params.php'),
     require(__DIR__ . '/params-local.php')
 );

 return [
     'id' => 'app-console',
     'basePath' => dirname(__DIR__),
     'bootstrap' => ['log'],
     'controllerNamespace' => 'console\controllers',
     'components' => [
         'log' => [
             'targets' => [
                 [
                     'class' => 'yii\log\FileTarget',
                     'levels' => ['error', 'warning'],
                 ],
             ],
         ],
     ],
     'params' => $params,
 ];

 <?php
 return [
     'adminEmail' => '[e-mail]',
     'supportEmail' => '[e-mail]',
     'user.passwordResetTokenExpire' => 3600,
 ];

And this is one of the wannabe tests:

 <?php namespace tests\acceptance;

 use \AcceptanceTester;
 use backend\models\User; ## I have tried writing it with a / at the beggining

class ListUserCest
{
public function _before(AcceptanceTester $I)
{

}

public function _after(AcceptanceTester $I)
{
}

public function init(AcceptanceTester $I)
{
    $this->login($I);

    if( User::find()->exists() )
        $I->amGoingTo('List Users having at least one');
    else
        $I->amGoingTo('List Users having any');
}

...

I get this error when running tests:

PHP Fatal error: class 'backend \ models \ User' not found in /var/www/project/tests/acceptance/ListUserCest.php on line 21 Error: class 'backend \ models \ User' not found

Please help me, I tried everything I know.

EDIT

( , vitalik_74) , , \Yii , -, . , \backend\models\User, Yii:: $app- > (, , ).

User - ActiveRecord , , Labels , getProfile().

<?php
namespace backend\models;
use common\helpers\MathHelper;
use backend\models\AntropometricData;
use Yii;

class User extends \yii\db\ActiveRecord
{
    /**
     * @inheritdoc
     */
    public static function tableName()
    {
        return 'user';
    }
...

Answer 1

test/_bootstrap.php:

require('vendor/autoload.php');
require('vendor/yiisoft/yii2/Yii.php');
$config = require('config/web.php');
(new yii\web\Application($config));