squareup_spec.rb

module PaymentExampleHelpers

  def when_amount_is(amount, &block)
    context "with an amount of $#{amount}" do
      instance_eval(&block)
    end
  end

end


RSpec.configure do |config|
  config.extend(PaymentExampleHelpers)
end

describe 'Payment' do

  when_amount_is(10.00) do
    it { should == "with an amount of $10.0" }
  end

  context "with an amount of $42.00" do
    it { should == "with an amount of $42.00" }
  end

end