UsesAccessTokenTest.php

<?php

use Illuminate\Foundation\Testing\DatabaseTransactions;
use Sa\Http\Controllers\Traits\UsesAccessToken;
use Sa\Models\SupervisionSite;
use Sa\Models\User;
use Sa\Services\AccessToken\AccessToken;

class UsesAccessTokenTest extends TestCase // TestCase extends PHPUnit_Framework_TestCase
{
    use DatabaseTransactions;

    /**
     * This method is the only public method in the trait; various controllers use it to return
     * an access token for use by the client.
     * The trait is for use in http controllers, and thus depends on having access to an
     * authenticated user, i.e. auth()->user()
     *
     * @group controllers
     */
    public function testPostAccessToken()
    {
        // arrange
        $user = factory(User::class)->create();
        auth()->login($user);
        $model = factory(SupervisionSite::class)->create();
        $svc = $this->getTraitInstance();

        // act
        $token = $svc->postAccessToken($model);

        // assert
        $this->assertInstanceOf(AccessToken::class, $token);

    }

    /**
     * Get an anonymous class instance that uses the trait,
     * and expose the protected methods via __call().
     */
    protected function getTraitInstance()
    {
        return new class {
            use UsesAccessToken;

            function __call($method, $params)
            {
                return call_user_func_array([$this, $method], $params);
            }
        };
    }
}