c# – Moq具有另一个moq的具体类的属性

2019年7月20日 211次阅读

我正在尝试创建一个具体类的模拟,并使用另一个模拟模拟其中一个属性.

public class MyClass
{
  public virtual IAdapter Adapter {get; internal set;}
}

测试…

var adapter = new Mock<IAdapter>();
adapter.Setup(a => a.WaitForDigit()).Returns(1);
var myClass = new Mock<MyClass>();
myClass.Setup(c => c.Adapter).Returns(adapter.Object); //throws exception

它抛出以下异常：
System.ArgumentException：常量与定义的类型不匹配

我该如何解决这个问题？

编辑：

我改变了设计,即便如此,它仍然会抛出相同的异常

public class MyClass
{
  public virtual IAdapter Adapter {get;set;}
  public MyClass(IAdapter adapter)
  {
    Adapter = adapter;
  }
}

var adapter = new Mock<IAdapter>();
adapter.Setup(a => a.WaitForDigit()).Returns(1);
var myClass = new MyClass(adapter.Object); //throws exception

System.ArgumentException: Constant does not match the defined type.
Result StackTrace:  
at System.Reflection.Emit.TypeBuilder.SetConstantValue(ModuleBuilder module, Int32 tk, Type destType, Object value)
   at System.Reflection.Emit.ParameterBuilder.SetConstant(Object defaultValue)
   at Castle.DynamicProxy.Generators.Emitters.MethodEmitter.DefineParameters(ParameterInfo[] parameters)
   at Castle.DynamicProxy.Generators.Emitters.MethodEmitter..ctor(AbstractTypeEmitter owner, String name, MethodAttributes attributes, MethodInfo methodToUseAsATemplate)
   at Castle.DynamicProxy.Generators.Emitters.AbstractTypeEmitter.CreateMethod(String name, MethodAttributes attributes, MethodInfo methodToUseAsATemplate)
   at Castle.DynamicProxy.Generators.MethodGenerator.Generate(ClassEmitter class, ProxyGenerationOptions options, INamingScope namingScope)
   at Castle.DynamicProxy.Contributors.CompositeTypeContributor.ImplementMethod(MetaMethod method, ClassEmitter class, ProxyGenerationOptions options, OverrideMethodDelegate overrideMethod)
   at Castle.DynamicProxy.Contributors.CompositeTypeContributor.Generate(ClassEmitter class, ProxyGenerationOptions options)
   at Castle.DynamicProxy.Generators.ClassProxyGenerator.GenerateType(String name, Type[] interfaces, INamingScope namingScope)
   at Castle.DynamicProxy.Generators.ClassProxyGenerator.<>c__DisplayClass1.<GenerateCode>b__0(String n, INamingScope s)
   at Castle.DynamicProxy.Generators.BaseProxyGenerator.ObtainProxyType(CacheKey cacheKey, Func`3 factory)
   at Castle.DynamicProxy.Generators.ClassProxyGenerator.GenerateCode(Type[] interfaces, ProxyGenerationOptions options)
   at Castle.DynamicProxy.DefaultProxyBuilder.CreateClassProxyType(Type classToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options)
   at Castle.DynamicProxy.ProxyGenerator.CreateClassProxy(Type classToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options, Object[] constructorArguments, IInterceptor[] interceptors)
   at Moq.Proxy.CastleProxyFactory.CreateProxy(Type mockType, ICallInterceptor interceptor, Type[] interfaces, Object[] arguments)
   at Moq.Mock`1.<InitializeInstance>b__24_0()
   at Moq.PexProtector.Invoke(Action action)
   at Moq.Mock`1.InitializeInstance()
   at Moq.Mock`1.OnGetObject()
   at Moq.Mock.GetObject()
   at Moq.Mock.get_Object()
   at Moq.Mock`1.get_Object()

最佳答案 这看起来像是一个设计问题.如果您依赖另一个类,则该依赖项不应该是公共的.看这里

Should injected dependencies be publicly accessible or private?

一旦包含该依赖项并且没有外部访问权限,就没有必要对该依赖项进行moq.你的MyClass的moq’ed方法应该足够了.

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