RSpec Test of Custom Devise Session Controller Fails with AbstractController::ActionNotFound - ruby-on-rails

Question

I am currently trying to test a custom Devise session controller with rspec. My controller looks like this:
class SessionsController < Devise::SessionsController
def create
#valid email?
if !(params[:email] =~ /^[A-Za-z0-9._%+-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,}$/)
set_flash_message :notice, "Please enter a valid e-mail address!"
end
super
end
end
My RSpec Controller Test is this:
require 'spec_helper'
require 'devise/test_helpers'
describe SessionsController do
it "should put a warning on invalid mail address login attempt" do
post :create, :user => {:email => 'invalidEmailAddress'}
response.should contain "Please enter a valid e-mail address!"
end
it "should put no warning on valid mail address login attempt" do
pending
end
end
If I execute the RSpec Test it fails with the following line:
Failure/Error: post :new, :user => {:email => 'invalidEmailAddress'}
AbstractController::ActionNotFound
# ./spec/controllers/sessions_controller_spec.rb:7
Tips from the plataformatec Devise Wiki as well as this post did not solve this issue. Thanks for your help.
Addition
I investigated further. I was actually able to "remove" the error with the following addition to the controller spec:
before(:each) do
request.env['devise.mapping'] = Devise.mappings[:user]
end
But now a new error appears:
Failure/Error: post :create #currently fails with multiple render warning
Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like "redirect_to(...) and return".
Even with the create method left out in the inheriting controller the error appears. The error does not appear on get :new for example. It seems to be post :create only.
I am out of ideas? Any help?
Thanks!

Answer 1

I finally fixed my problem by doing including the devise test helpers, calling the method setup_controller_for_warden in my test AND doing request.env["devise.mapping"] = Devise.mappings[:user]. Like so:
require 'test_helper'
class SessionsControllerTest < ActionController::TestCase
include Devise::TestHelpers
test "should reject invalid captcha" do
setup_controller_for_warden
request.env["devise.mapping"] = Devise.mappings[:user]
get :new
assert_response :success
end
end
Not sure about your double render problem though, are you sure your supposed to call post :create then render? i'm not sure how rspec is supposed to work.