Rspec to check title using controller stub

Question

I am a newbie to rails and rspec. I am using

rspec-rails 3.0.0

rspec 3.0.0

ruby 2.3.5

I wrote a sample controller

class BaseClass::SampleController < ApplicationController
  skip_before_filter :check_privilege
  def choose
     @page_title = I18n.t('BaseClass.box.chooser_title')
     render :layout => false
end 
end

where

BaseClass.box.chooser_title

is in config/locale/en.yml and it's value is "sample title"

I also have choose.html.erb in app/view and it has title sample title

And I wrote some Rspec for the above controller

context "choose" do
it "renders the choose template" do 
    get :choose
    expect(response).to render_template('choose')
end

it "page title should be Sample title " do
    get :choose
    BaseClass::SampleController.any_instance.stubs(:page_title).returns("Sample title") 
    obj = BaseClass::SampleController.new
    expect(obj.page_title).to eql "Sample title"
end

I want to check whether the title of choose.html.erb is "sample text" or not. I have two questions

1. I tried writing a stub for the controller in the second test case, the test case runs successfully even when I change the :page_title to some other name(It's not referencing : page_title in BaseClass::SampleController) why?

2. if not stub how can I access page_title in the spec to check?

Answer 1

If you just want to check the title, you don't really need stubs. Try this:

it "page title should be Sample title " do
    get :choose
    expect(assigns(:page_title)).to eq "Sample title"
end

You can read more about this method here