How to feature test file uploads using PHPUnit

Hi,

I am trying to simulate an image file upload but unable to bypass the file validation(because it calls is_uploaded_file to verify the file is actually uploaded) and my code uses move_uploaded_files to upload the files.

I am using the fzaninotto/faker library to generate image for test.

function file_upload_test()
{
    $_FILES = [
        'image' => [
            'name' => 'image.jpg',
            'tmp' => $this->faker->image(), 
            'type' => 'image/jpeg',
            'size' => 100,
            'error' => 0,
        ]
    ];

    $_SERVER['REQUEST_METHOD'] = 'POST';

    $this->application->handle('/post/url');
}

Any solutions?