2FAuth/tests/Feature/Http/Auth/RegisterControllerTest.php

<?php

namespace Tests\Feature\Http\Auth;

use App\Models\User;
use Illuminate\Support\Facades\DB;
use Tests\FeatureTestCase;

/**
 * @covers  \App\Http\Controllers\Auth\RegisterController
 */
class RegisterControllerTest extends FeatureTestCase
{
    private const USERNAME = 'john doe';

    private const EMAIL = 'johndoe@example.org';

    private const PASSWORD = 'password';

    /**
     * @test
     */
    public function setUp(): void
    {
        parent::setUp();
    }

    /**
     * @test
     */
    public function test_register_returns_success()
    {
        DB::table('users')->delete();

        $response = $this->json('POST', '/user', [
            'name'                  => self::USERNAME,
            'email'                 => self::EMAIL,
            'password'              => self::PASSWORD,
            'password_confirmation' => self::PASSWORD,
        ])
            ->assertCreated()
            ->assertJsonStructure([
                'message',
                'name',
            ])
            ->assertJsonFragment([
                'name' => self::USERNAME,
            ]);
    }

    /**
     * @test
     * 
     * @covers  \App\Rules\FirstUser
     */
    public function test_register_returns_already_an_existing_user()
    {
        DB::table('users')->delete();
        $user = User::factory()->create();

        $response = $this->json('POST', '/user', [
            'name'                  => self::USERNAME,
            'email'                 => self::EMAIL,
            'password'              => self::PASSWORD,
            'password_confirmation' => self::PASSWORD,
        ])
            ->assertJsonValidationErrorFor('name');
    }

    /**
     * @test
     */
    public function test_register_with_invalid_data_returns_validation_error()
    {
        $response = $this->json('POST', '/user', [
            'name'                  => null,
            'email'                 => self::EMAIL,
            'password'              => self::PASSWORD,
            'password_confirmation' => self::PASSWORD,
        ])
            ->assertStatus(422);
    }
}