使用 rspec 测试 aasm 状态转换

Question

我正在使用 aasm gem 来处理我的项目中的状态转换。我有一个简单的模型，如下所示：

class TransferPostingBid < ActiveRecord::Base
  include AASM

  aasm :status do
    state :offered, initial: true
    state :wait_for_pap_confirmation
    state :confirmed_by_pap
    state :retracted_by_pap

    event :pap_choosed do
      transitions from: :offered, to: :wait_for_pap_confirmation
    end

    event :confirmed_by_pap do
      transitions from: :wait_for_pap_confirmation, to: :confirmed_by_pap
    end

    event :retracted_by_pap do
      transitions from: :wait_for_pap_confirmation, to: :retracted_by_pap
    end
  end
end

我正在尝试使用内置 rspec 匹配器的 aasm 测试转换：

require 'rails_helper'

describe TransferPostingBid, type: :model do
  describe 'state transitions' do
    let(:transfer_posting_bid) { TransferPostingBid.new }

    it 'has default state' do
      expect(transfer_posting_bid).to transition_from(:offered).to(:wait_for_pap_confirmation).on_event(:pap_choosed)
    end
  end
end

当我运行此规范时，它会返回以下错误：

 AASM::UnknownStateMachineError:
   There is no state machine with the name 'default' defined in TransferPostingBid!

我怎样才能解决这个问题？

Answer 1

您可以尝试使用该#on方法来指定您正在测试的状态机：

transition_from(:offered).to(:wait_for_pap_confirmation).on_event(:pap_choosed).on(:status)