RhinoMocks - 無法投Foo類型使用非靜態庫

Question

我嘗試了RhinoMocks（只是剛剛開始，請溫柔！），並很困惑，當輸入欄爲什麼如果我用這個設置：

var mockRepos = new MockRepository(); 
var mockServiceProvider = mockRepos.DynamicMock<IServiceProvider>(null); 
var mockContext = mockRepos.DynamicMock<IPluginExecutionContext>(null); 

mockServiceProvider.Expect(x => x.GetService(typeof(IPluginExecutionContext))).Return(mockContext); 

var someSampleClass = new SomeClassOrOther(mockServiceProvider); 

在SomeClassOrOther某一點，該方法GetService被稱爲

var context = (Microsoft.Xrm.Sdk.IPluginExecutionContext)serviceProvider.GetService(typeof(Microsoft.Xrm.Sdk.IPluginExecutionContext)); 

，並導致異常：

Unable to cast object of type 'Castle.Proxies.ObjectProxyd0bf4b879a6341bbba3478cf1189d621' to type 'Microsoft.Xrm.Sdk.IPluginExecutionContext'. 

但是，如果我使用：

var mockServiceProvider = MockRepository.GenerateMock<IServiceProvider>(null); 
var mockContext = MockRepository.GenerateMock<IPluginExecutionContext>(null); 

mockServiceProvider.Expect(x => x.GetService(typeof(IPluginExecutionContext))).Return(mockContext); 

即靜態MockRepository.GenerateMock並沒有錯誤執行。

我在哪裏錯了？

Answer 1

我不知道你爲什麼會得到這個例外。但是，當使用「舊」非靜態語法時，您會在「記錄」狀態中進行嘲弄。使用它們之前，你需要把它們設置在回放模式：

var mockRepos = new MockRepository(); 
var mockServiceProvider = mockRepos.DynamicMock<IServiceProvider>(); 
var mockContext = mockRepos.DynamicMock<IPluginExecutionContext>(); 

mockRepos.ReplayAll(); 

mockServiceProvider 
    .Stub(x => x.GetService(typeof(IPluginExecutionContext))) 
    .Return(mockContext); 

var someSampleClass = new SomeClassOrOther(mockServiceProvider); 

Answer 2

你是混合新AAA語法和老Record/Replay語法。當您使用Expect擴展方法和新的AAA語法時，您不需要在mocks存儲庫上進行操作並手動更改其模式（記錄/重放）。創建新的靜態方法模擬考試（其中創建重播模式嘲笑），後來覈實的期望：

// Arrange 
var mockServiceProvider = MockRepository.GenerateMock<IServiceProvider>(); 
var mockContext = MockRepository.GenerateMock<IPluginExecutionContext>(); 

mockServiceProvider.Expect(x => x.GetService(typeof(IPluginExecutionContext))) 
        .Return(mockContext); 

var someSampleClass = new SomeClassOrOther(mockServiceProvider); 
// Act 

// Assert 
mockServiceProvider.VerifyAllExpectations(); 

這裏是老Record/Replay語法比較：

var mockRepos = new MockRepository(); 
var mockServiceProvider = mockRepos.DynamicMock<IServiceProvider>(); 
var mockContext = mockRepos.DynamicMock<IPluginExecutionContext>(); 

Expect.Call(mockServiceProvider.GetService(typeof(IPluginExecutionContext))) 
     .Return(mockContext); 
mockRepos.ReplayAll(); 

var someSampleClass = new SomeClassOrOther(mockServiceProvider); 
// exercise your SUT 
mockRepos.VerifyAll();