How to send raw post data in a Rails functional test?

Question

I\'m looking to send raw post data (e.g. unparamaterized JSON) to one of my controllers for testing:

class LegacyOrderUpdateControllerTest < ActionControl         


        

Answer 1

Looking at stack trace running a test you can acquire more control on request preparation: ActionDispatch::Integration::RequestHelpers.post => ActionDispatch::Integration::Session.process => Rack::Test::Session.env_for

You can pass json string as :params AND specify a content type "application/json". In other case content type will be set to "application/x-www-form-urlencoded" and your json will be parsed properly.

So all you need is to specify "CONTENT_TYPE":

post :index, '{"foo":"bar", "bool":true}', "CONTENT_TYPE" => 'application/json'