Problem with mocking helper methods

Given that I assume that rails helper image_tag works as intended, I
want to mock out call to this method in my helper.

spec/helpers/some_helper_spec.rb:
require ‘spec_helper’
describe SomeHelper do
it ‘allows stub tags’ do
helper.should_receive(:image_tag).with(2).and_return(3)
helper.image_tag(2).should == 3
end
end

result:
Failure/Error : helper.image_tag(2).should == 3
expected : 3
got : “<img alt=“2” src=”/assets/2" />" (using ==)

Bundle:

  • rspec (2.7.0)
  • rspec-core (2.7.1)
  • rspec-expectations (2.7.0)
  • rspec-mocks (2.7.0)
  • rspec-rails (2.7.0)
  • rails (3.1.1)

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