development laravel php testing

Imagine you are using streamed downloads in your Laravel controllers like this:

use App\Services\GitHub;

return response()->streamDownload(function () {
    echo GitHub::api('repo')
                ->contents()
                ->readme('laravel', 'laravel')['contents'];
}, 'laravel-readme.md');

I was doing this in a project and I wanted to test it. I wanted to make sure that the response was streamed and that the content was correct.

The way I tested it was like this:

/** @test */
public function it_streams_the_download()
{
    $user = User::factory()->create();

    $response = $this->actingAs($user)
        ->get('/my-endpoint')
        ->assertOk();

    $content = $response->streamedContent();
    $this->assertEquals('The content of the file', $content);
}

Thanks for this article for the inspiration.

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