如何编写state_machine转换回调的rspec测试

Question

我有任意调整扩展

Spree::Adjustment.class_eval do
  state_machine do
    after_transition :to => :closed, :do => :some_method
  end
  def some_method
  end
end

我有rspec测试失败了。在实际应用程序中，方法被调用，所有事情都按预期工作。

describe Spree:Adjustment do 
    let(:adjustment) { create(:adjustment, state: 'open') }
    it "call some_method after close" do
      adjustment.should_receive(:some_method)
      adjustment.state = "closed"
    end
end    

失败了

 1) Spree::Adjustment call some_method after close
 Failure/Error: adjustment.should_receive(:some_method)
   (#<Spree::Adjustment:0x0000000751a340>).some_method(any args)
       expected: 1 time with any arguments
       received: 0 times with any arguments

Answer 1

如果像使用Adjustment#state=方法一样显式地设置状态，状态机转换就不能工作(在本例中)。您应该使用事件，例如：

adjustment.close