rails: Sending JSON in functional tests does not populate the params hash

test 'sending raw JSON does not populate the params hash' do
  @request.headers['Content-Type'] = 'application/json'
  post :create, { key: "value" }.to_json

  assert_equal "value", params['key'] # => Will fail!
end

will result in following params hash:

{"controller"=>"posts", "action"=>"create"} # Hence the missing key-value pair.

However sending the corresponding request with curl or other apps, it works like intended. I even asked on StackOverflow, however no answer yet. Looks like a bug for me.

About this issue

Original URL
State: closed
Created 11 years ago
Comments: 31 (23 by maintainers)

Commits related to this issue

allow sending documents in AC::TestCase#post and friends. — committed to rails/rails by apotonick 13 years ago
In AC::TestCase#process, parse the request body to params as it is done in the ParamsParser middleware. fixes #13135. this is another work-around to make AC::TestCase behave the way a real integratio... — committed to apotonick/rails by apotonick 11 years ago

Most upvoted comments

In case anyone end up here via Google (like I did), the correct way to do this in Rails 5 is:

post new_widget_url, as: :json, params: { foo: "bar" }
# will set the correct content-type header automatically

this is only marginally related to the question, but hopefully helpful to others with the same question as I had

+11

sandstrom on Sep 13, 2018

I started to test with Rack-test. It is a million times faster, no magic and does exactly what you would think it does.

apotonick on Oct 8, 2015