Yii2 codeception dataFile fixture can't be found - yii2

Question

I am trying to run simple test and insert two record in db via fixture dataFile.
What I get is :
[ReflectionException] Class C:\xampp\htdocs\codeception\frontend\tests/_data\user.php does not exist
The file is obviously there. My UserTest.php looks like this:
<?php
class UserTest extends \Codeception\Test\Unit
{
public function _fixtures()
{
return [
'class' => \frontend\tests\fixtures\UserFixture::className(),
'dataFile' => codecept_data_dir() . 'user.php'
];
}
public function testValidation()
{
$user = new \common\models\User();
$user->setUsername(null);
$this->assertFalse($user->validate(['username']));
$user->setUsername('aaaaaaaaaaaaaaaaaaaaaaaaaa');
$this->assertFalse($user->validate(['username']));
$user->setUsername('toma');
$this->assertTrue($user->validate(['username']));
}
public function testIfUserExist()
{
$this->tester->seeRecord('user', ['name' => 'Toma']);
}
}
I saw the linux like forward slash in the error but don't know how to change it. Not sure if this is the problem because I had the same path with some images and it was fine then. What can cause this ? Thank you!

Answer 1

You're using seeRecord() in a wrong way. First argument needs to by class name, including namespace, so you should use it like this:
$this->tester->seeRecord(\frontend\models\User::class, ['name' => 'Toma']);