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Testing in Laravel 11: Advanced Level

Asserting File Downloads

Summary of this lesson:
- Test file download responses
- Check HTTP headers for file downloads
- Verify filename in download headers
- Use assertHeader() for download testing

This short lesson is about a rarely used assertion for file downloads.


In the Controller, you have a method where the response is to download a file.

use Symfony\Component\HttpFoundation\BinaryFileResponse;
 
class ProductController extends Controller
{
// ...
 
public function download(): BinaryFileResponse
{
return response()->download(storage_path('files/product-specification.pdf'));
}
}

How can you test if this download was successful and if the download returned that exact file name to the browser?

In the test, you can assert the...

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