Ruby on rails rspec应接收（x）。with（参数）缺失

这是一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

生成以下结果

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"])

 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"])

它看起来不是null，也不是空字符串，它只是消失了。输出面板对象的值 在设置期望值之前，它是一个被激活的ActiveRecord对象 保存到数据库

将期望更改为：

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

生成以下结果

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"])

 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"])

---

第二个参数应该是

[1]

（

Fixnum

），而实际参数是

[“1”]

（

String

）。也许第二个参数是什么不符合你的规格

---

这并不能解释第一个示例中的奇怪输出…

奇怪输出是由于SimplePanel模型中的description属性造成的。当RSpec为

应该接收（..）生成失败消息时，
使用（..）
它通过使用
args.collect{arg | arg.respond_to？（：description）？arg.description:arg.inspect}.join（，）来格式化参数。这导致了在<代码>预期（[1）] < /代码>中的空白，因为对模拟模型的描述是空白的。
编辑：此问题已在当前版本的rspec中修复-
您能否显示
panel=SimplePanel.make的示例值？请看我上面的编辑。除了奇怪的输出，这就是问题所在。一旦断言更改为：
TestingGroup.any_instance.should_receive（：add_panel！），并带有（SimplePanel的instance_），[“#{SampleType:：SERUM}]”
测试通过。我的假设（在睡了一个好觉之后）是，它永远不会以最初的预期通过，因为控制器操作加载的面板对象（尽管是同一个数据库记录）是不同的ActiveRecord对象，因此它无论如何都不会匹配。第二个参数中的字符串vs Fixnum问题是导致测试失败的原因。