RSpec that should pass, but does not.

gistfile1.rb

# categories_controller_spec.rb
describe User::CategoriesController do
  # ...
  describe "GET assign" do
    describe "with user having 0 categories" do
      it "should redirect to action index" do
        @login_user.stub_chain(:categories, :size).and_return(0)
        response.should redirect_to(:action => 'index')
      end
    end
  end
  # ...
end

# categories_controller
  def assign
    if (current_user.categories.size <= 0)
      redirect_to(:action => :index)
      return
    end
    # ...
  end

# autospec output
F................

1)
'User::CategoriesController GET assign with user having 0 categories should redirect to action index' FAILED
expected redirect to {:action=>"index"}, got no redirect
./spec/controllers/user/categories_controller_spec.rb:145:

Finished in 1.474359 seconds

17 examples, 1 failure

### Comments
# This test should pass, because the redirect takes place if @login_user.categories.size <= 0.