gistfile1.rb

describe Something do
  context "when it is too old" do
    # Two options here: 
    # (a) make it too old by changing the internal state
    # Pros: Simple
    # Cons: If you change the definition of what is "too old" you have to change many tests
    before { subject.updated_at = 2.years.ago }
    # (b) stub the too_old? method
    # Pros: Resistant to changes of what "too old" exactly means
    # Cons: Forces the implementation to use a specific method.
    before { subject.stubs(:too_old?).returns(true) }
  end
end