Downloading file to specific folder using Capybara and Poltergeist driver

Question

I am writing my acceptance tests using Capybara and Poltergeist driver.I need to validate the content of the CSV file downloaded.

1. I tried various ways of rendering the content on the page itself instead of downloading it.
2. Also tried changing the mime types, but it is not working.

Finally I want to settle down with the option of downloading the file in a specific folder and then read the CSV file using core ruby libraries.

In order to achieve this,when poltergeist driver clicks on download link then I want it to handle the pop-up and download the file directly in the given folder.

In Selenium's chrome and firefox drivers, I have option of configuring profiles to handle pop ups and configure download directory.

Is there any such option using poltergeist? Any information will be helpful.

Answer 1

There is an ticket to support downloading files in PhantomJS/Poltergeist and there are one or two forks which claims that they made it to work somehow. See https://github.com/ariya/phantomjs/issues/10052

Answer 2

I've had to do similar things in my rails app. My solution is using Javascript to make a XMLHttpRequest to the URL, downloading the file, returning the contents of the file back to Capybara, and using ruby to save the file somewhere on disk. Then in another step, I check the contents to the downloaded CSV file.

Here's the step definition for downloading the file:

Then /^I download the csv file$/ do
  page.execute_script("window.downloadCSVXHR = function(){ var url = window.location.protocol + '//' + window.location.host + '/file.csv'; return getFile(url); }")
  page.execute_script("window.getFile = function(url) { var xhr = new XMLHttpRequest();  xhr.open('GET', url, false);  xhr.send(null); return xhr.responseText; }")

  data = page.evaluate_script("downloadCSVXHR()")
  File.open(File.join(Rails.root, "tmp", "csv.data"), "w") { |f| f.write(data) }
end

Change the URL in the Javascript code to your CSV's location.

And finally, here's my step definition for validating the CSV file's contents:

And /^the contents of the downloaded csv should be:$/ do |contents|
  file = File.open(File.join(Rails.root, "tmp", "csv.data"), "r")
  file_contents = file.read
  file_contents.chop!
  file_contents.should == contents
end

Good luck. Hope this helps.

Answer 3

This is not currently possible with Poltergeist.

I think you'd be better off writing a test for this CSV which doesn't use Capybara. (E.g. by using the built-in Rails integration testing stuff and parsing the response as a CSV.)