TestCase.php with signIn method 2

TestCase.php

<?php

namespace Tests;

use Illuminate\Foundation\Testing\TestCase as BaseTestCase;

abstract class TestCase extends BaseTestCase
{
    use CreatesApplication;
    
    protected function signIn($user = null) {
        $user = $user ?: create('App\User');

        $this->actingAs('$user');

        return $this;
    }
}