unit-testing - RhinoMocks - 使用非静态存储库时无法将类型 foo 转换为类型 bar

Question

我正在尝试 RhinoMocks(才刚刚开始，请温柔!)并且很困惑为什么我使用此设置:

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 中的某个时刻，调用方法 GetService

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

并导致异常:

 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);

即静态 MockRepository.GenerateMock 并且执行时没有错误。

我哪里出错了？

Answer 1

我不知道为什么你会遇到这个异常。但是，当使用“旧”非静态语法时，您会得到处于“记录”状态的模拟。在使用它们之前，您需要将它们设置为重放模式:

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);