Call to a member function connection() on null Laravel 5.4

Question

Try write a unit test and i need do sql query

class UpdateThrowsTest extends TestCase
{

protected $bgame;
protected $game_id = 95;

public function setUp()         


        

Answer 1

If anyone bounce to this error during test with Laravel 6 project.

Try to check if the extends TestCase is using the right TestCase. It could be due to Laravel 6 make:test generated test using the wrong TestCase.

Change

use PHPUnit\Framework\TestCase;

To

use Tests\TestCase;

The problem should solve.

Answer 2

I had this error on laravel 7 (nothing worked even php artisan serve) and fixed it with

composer dumpautoload 

Before that update my vendor with composer update and then everything worked fine.