Laravel faking file in the factory not working - laravel

Question

I am developing a Web application using Laravel. I am unit testing my application that involves file operation. Have a look at my scenario below.
I have a download file action in the controller like this
public function downloadPersonalDetails(Order $order)
{
if (! auth()->user()->can('downloadPersonalDetails', $order)) {
abort(401);
}
return Storage::download($order->path);
}
I have the factory like this OrderFactory.php
$factory->define(Application::class, function (Faker $faker) {
return [
'first_name' => $faker->firstName,
'last_name' => $faker->lastName,
'email' => $faker->email,
//other fields ....
'path' => $faker->file('public/assets/files'),
});
This is my unit test to that download action
public function test_download_personal_details_file()
{
$user = //created a authorized valid user
$order = factory(Order::class)
->create([
'user' => $user->id
]);
$this->actingAs($user)->get(route('order.personal_info.download', $order))->assertStatus(200);
}
When I run the test I am getting error saying file does not exist.
File not found at path: tmp/439fe03f-f1c7-3b84-b123-d627d0395bd8.pdf
Why is that not working? How can I fix it and what is wrong with my code.

Answer 1

The faker will just create a fake filename however that filename will not correspond to any actual file. You will need to also fake it in the storage:
public function test_download_personal_details_file()
{
$user = //created a authorized valid user
$order = factory(Order::class)
->create([
'user' => $user->id
]);
\Storage::fake(config('filesystems.default')); //or any storage you need to fake
\Storage::put($order->path, ''); //Empty file
$this->actingAs($user)->get(route('order.personal_info.download', $order))->assertStatus(200);
}
This will create a file in the fake storage (so it won't actually write to disk).
This requires Laravel 5.4+