我有一个名为:
的方法的接口IEnumerable<string> GetFilesInADirectoryWhere(
string directory,
string wildcard,
Predicate<string> filter);
我想Setup
这种方法,实际上调用 filter
。所以我宣布这样:
myMock.Setup( x => x.GetFilesInADirectoryWhere(
@"My Folder",
@"FooFile*.*",
It.IsAny<Predicate<string>>()))
.Returns((Predicate<string> filter) =>
cannedFileNames.Where(filename=>filter(filename)));
这个编译,但是当调用这个模拟方法时,我得到以下运行时异常:
SetUp : System.Reflection.TargetParameterCountException : Parameter count mismatch.
at System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at Moq.Extensions.InvokePreserveStack(Delegate del, Object[] args)
at Moq.MethodCallReturn`2.Execute(ICallContext call)
at Moq.Interceptor.Intercept(ICallContext invocation)
at Moq.Proxy.CastleProxyFactory.Interceptor.Intercept(IInvocation invocation)
at Castle.DynamicProxy.AbstractInvocation.Proceed()
at Castle.Proxies.IDiskProxy.GetFilesInADirectoryWhere(String directory, String filter, Predicate`1 predicate)
知道我做错了吗?
答案 0 :(得分:3)
您正在调用错误的Returns
重载。应该是:
Returns<T1,T2,T3>(Func<T1,T2,T3,IEnumerable<string>>)
- 匹配您方法的签名安装程序应如下所示:
myMock
.Setup(m => m.GetFilesInADirectoryWhere(
@"My Folder",
@"FooFile*.*",
It.IsAny<Predicate<string>>())
)
.Returns<string, string, Predicate<string>>((dir, wildcard, filter) =>
cannedFileNames.Where(filename => filter(filename))
);