mocking/stubbing a controller recaptcha method with rspec in rails

问题

I'm just learning how to use stubs and mocks and I would like to mock out the below verify_recaptcha method to test both outcomes of the condition.

my controller code (DogMailsController)

      if verify_recaptcha(:model=>@email,:message=>"Verification code is wrong", :attribute=>"verification code")  
        if DogMail.make_mail dog_mail_params
          result = "success"
        else
          result = "fail"
        end
      else
        flash.delete(:recaptcha_error)
        flash.now[:error] = "Validation Failed. Please enter validation numbers/letters correctly at bottom."
        render :action => 'new', :locals => { :@email => DogMail.new(dog_mail_params)}
      end
     end

My spec so far

context "when master not signed in" do 
  context "when recaptcha verified" do 
    context "with valid params" do 
      it "should save the new dog mail in the database" do  

        expect{
          post :create, dog_mail: attributes_for(:dog_mail)
        }.to change(DogMail, :count).by(1)
      end
    end 
    context "with invalid params" do 
    end
  end

What should I put above expect inorder to stub/mock out verify_recaptcha? I tried DogMailsController.stub(:verify_recaptcha).and_return(false) but it doesn't seem to work.

回答1:

You just need to stub controller.verify_recaptcha, so with RSpec 3 syntax:

allow(controller).to receive(:verify_recaptcha).and_return(true)

回答2:

Recent versions (3.2+ I think) of the Recaptcha gem hide the widget in test by default, so you're more likely to end up needing to mock a Recaptcha failure than a Recaptcha success. If you're testing a Rails controller directly, you can use a variant of infused's answer above:

expect(controller).to receive(:verify_recaptcha).and_return(false)

If you're in a Rails 5 system or request spec, you may need to use expect_any_instance_of:

expect_any_instance_of(MyController).to receive(:verify_recaptcha).and_return(false)

You could also use

expect_any_instance_of(Recaptcha::Verify)

Note though that there are also situations (e.g. a server timeout) in which verify_recaptcha will raise Recaptcha::RecaptchaError instead of returning false, so you may want to test for those as well -- as above, but replace

and_return(false)

with

and_raise(Recaptcha::RecaptchaError)

(As it happens, this will also

来源：https://stackoverflow.com/questions/25349927/mocking-stubbing-a-controller-recaptcha-method-with-rspec-in-rails

标签

ruby-on-rails

unit-testing

rspec