Cookie test

ExampleTest.php

<?php

namespace App\Tests;

use TestCase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Foundation\Testing\DatabaseMigrations;
use Illuminate\Foundation\Testing\DatabaseTransactions;

class ExampleTest extends TestCase
{
    public function testCookies()
    {
        $response = $this->call(
            'GET',
            '/cookies',
            [/* parameters */],
            ['hello' => 'world']
        );
        var_dump($response);
    }
}

routes.php

<?php
Route::group(['middleware' => 'web'], function () {
    Route::get('/real/route', 'ProperController@iWantToTest');
    Route::get('/cookies', function () {
        return 'Cookie: ' . Request::cookie('hello');
    });
});