Precondition

You are not using javascript tests
The file is served from a public folder (not via controller)

Problem description

If you deliver files from a public folder it might be that the Content-Disposition header is not set. That's why the following spreewald Show archive.org snapshot step might raise an error:

Then I should get a download with filename "..."

expected: /filename="some.pdf"$/
     got: nil (using =~) (RSpec::Expectations::ExpectationNotMetError)

Solution

One solution is to check the Content-Type header only with the following spreewald Show archive.org snapshot step:

Then I should get a response with content-type "..."

Outline

How to test file downloads with tests that need javascript.

Public served

Look at the link of the url and check if this file exists in your public folder (Example for an image)

Server via controller

Write an own step which downloads the file and then makes tests with it (you can not check the url because this would be something like localhost:3000/users/4/avatar/3)
Override the send_file method of your controller (maybe application controller is also fine): If you are in the test suite return a text with the name of the file. Otherwise super.

Read the browser downloads folder

Inspecting the Chrome download folder to test file downloads with selenium

Emanuel

makandra.de

Say thanks

Last edit

2019-05-21

Emanuel

License

Source code in this card is licensed under the MIT License.

Async control flow in JavaScript: Promises, Microtasks, async/await

Slides for Henning's talk on Sep 21st 2017.

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

print('script start')
html = get('/foo')
print(html)
print('script end'...

Delivering Carrierwave attachments to authorized users only

Preparation

To attach files to your records, you will need a new database column representing the filename of the file. To do this, add a new migration (rails g migration <name>) with the following content:

class AddAttachmentToNotes...

Posted by Emanuel to makandra dev (2017-09-21 08:57)