Question

这个简单的控制器示例

describe 'create' do

  it 'creates a panel' do
    panel = SimplePanel.make! 

    TestingGroup.any_instance.should_receive(:add_panel!).with(panel, [SampleType::SERUM])

    post :create, {
      submission_id: submission.to_param,
      testing_group_id: testing_group.to_param,
      sample_type_ids: [SampleType::SERUM],
      panel_ids: [panel.id]
    }
  end

end

产生以下结果

Failure/Error: post :create, {
  #<TestingGroup:0x00000006685910> received :add_panel! with unexpected arguments
     expected: (, [1])
          got: (#<SimplePanel id: 266, name: "Some Simple Panel", description: nil, type: "SimplePanel", active: true, test_type_id: 1, species_id: 1, autonomous_panel: true, related_panel_id: nil, lock_version: 0, created_at: "2013-09-02 06:08:08", updated_at: "2013-09-02 06:08:08">, ["1"])

我的问题是面板对象（第一个参数）似乎完全没有超出测试结果的预期。

expected: (, [1])

它似乎不是null，或者是一个空字符串，它刚刚消失了。输出面板对象的值在设定期望之前，没有任何惊喜，这是一个ActiveRecord对象坚持到数据库。

将期望改为：

TestingGroup.any_instance.should_receive(:add_panel!).with(instance_of(SimplePanel), [SampleType::SERUM])

产生以下结果

 Failure/Error: post :create, {
   #<TestingGroup:0x00000006ff82e0> received :add_panel! with unexpected arguments
     expected: (#<RSpec::Mocks::ArgumentMatchers::InstanceOf:0x00000006f4a208 @klass=SimplePanel(id: integer, name: string, description: text, type: string, active: boolean, test_type_id: integer, species_id: integer, autonomous_panel: boolean, related_panel_id: integer, lock_version: integer, created_at: datetime, updated_at: datetime)>, [1])
          got: (#<SimplePanel id: 268, name: "Some Simple Panel", description: nil, type: "SimplePanel", active: true, test_type_id: 1, species_id: 1, autonomous_panel: true, related_panel_id: nil, lock_version: 0, created_at: "2013-09-02 06:22:17", updated_at: "2013-09-02 06:22:17">, ["1"])

这似乎和古怪一样。任何想法在这里发生了什么？

编辑：以下内容通常由SimplePanel.make创建！

attributes:
  id: 2
  name: Some Simple Panel
  description: 
  type: SimplePanel
  active: true
  test_type_id: 1
  species_id: 1
  autonomous_panel: true
  related_panel_id: 
  lock_version: 0
  created_at: 2013-09-02 07:33:19.032650000 Z
  updated_at: 2013-09-02 07:33:19.032650000 Z

Answer 1

您的第二个参数应为[1]（Fixnum），而实际参数为["1"]（String）。也许第二个参数是你的规格失败了吗？

这并不能解释你的第一个例子中的奇怪输出......

Answer 2

奇怪的输出是由SimplePanel模型中的description属性引起的。当RSpec为should_receive(..).with(..)生成失败消息时，它使用args.collect {|arg| arg.respond_to?(:description) ? arg.description : arg.inspect}.join(", ")格式化参数。这导致expected( ,[1])中的空白，因为模拟模型上的描述为空白。

编辑：此问题已在当前版本的rspec中修复 - https://github.com/rspec/rspec-mocks/pull/417

rspec should_receive（x）.with（参数）丢失了

2 个答案: