Rails helper testing cheatsheet Edit

Created 7/19/2010, updated 5/18/2017

Tools

RSpec 2 (spec framework)
RR (mocking library)
Factory Girl (object mother library)
Rails 3 (application framework)

Mocking and stubbing

Although helper methods are mixed into the example group itself:

describe FooHelper do
  describe '#funky_method' do
    it 'returns true' do
      funky_method.should be_true
    end
  end
end

If you need to set up mock expectations you will need to use the explicit helper instance that is available inside example groups:

it 'delegates to #foo_method' do
  mock(helper).foo_method
  helper.funky_method
end

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