Setting Content-Type header for RSpec and Rails-API

Question

I\'m using the rails-api gem to build a web service and want to test my API with RSpec. Every request I make, regardless of the HTTP method has the CONTENT_TYPE hea

Answer 1

Using the new Rails v5.0.x API only settings I found that this problem with rails defaulting everything to "application/x-www-form-urlencoded" is still in issue for testing with RSpec-Rails Requests

Here is what I did to fix the problem:

Create support file at ./spec/support/json_requests.rb

Edit it to be something like this to override the behavior for all of your API only JSON requests:

module JsonRequests
  def get(*args)
    super(*json_args(*args))
  end

  def post(*args)
    super(*json_args(*args))
  end

  def update(*args)
    super(*json_args(*args))
  end

  def patch(*args)
    super(*json_args(*args))
  end

  def put(*args)
    super(*json_args(*args))
  end

  def delete(*args)
    super(*json_args(*args))
  end

  def json_args(path, params = {}, headers = {})
    [path, params.to_json, headers.merge('CONTENT_TYPE' => 'application/json')]
  end
end

RSpec.configure do |config|
  config.include JsonRequests, type: :request
end

Keep in mind that this will override all Specs within ./spec/requests so if you need to use "application/x-www-form-urlencoded" you could also include this module manually as needed in your Describe 'something' do block.