how to fix undefined method errors in Laravel 7.x phpunit? - unit-testing

Question

I am experiencing strange errors. Like all of the common functions I saw online does are undefined in my phpunit..
I ran the test like this
./vendor/bin/phpunit
my code is like this
namespace Tests\Unit;
use PHPUnit\Framework\TestCase;
use Illuminate\Foundation\Testing\DatabaseMigrations;
use Illuminate\Foundation\Testing\WithoutMiddleware;
class AppTest extends TestCase
{
use DatabaseMigrations;
use WithoutMiddleware;
/** #test */
public function test_can_push_data() {
$paramData = [
'param1' => 'value1',
'param2' => 'value2',
];
$response = $this->json('POST', route('app.push'), $paramData);
$response->assertStatus(200);
}
}
I am getting this error
1) Tests\Unit\AppTest::test_can_push_data
Error: Call to undefined method Tests\Unit\AppTest::json()
I also noticed that am getting errors for other functions, I don't know why
$this->post()
$this->get()
Any ideas what's going on?, most of the tutorials I saw online are using these common methods, and these are throwing errors in my code ..why?

Answer 1

You are extending the wrong TestCase class. PHPUnit's TestCase class does not have those methods. You are looking for the Illuminate\Foundation\Testing\TestCase class. This will allow your tests to use the methods per the documentation:
namespace Tests\Unit;
use Illuminate\Foundation\Testing\TestCase;
use Illuminate\Foundation\Testing\DatabaseMigrations;
use Illuminate\Foundation\Testing\WithoutMiddleware;
class AppTest extends TestCase
...
It is worth noting, that it is ususally useful to create your own TestCase class, to provide common custom functionality. It is usually located at Tests\TestCase