WithArgumentsForConstructor（）拡張メソッドがコンストラクタ

Question

を呼び出すFakeItEasyチュートリアルhereによるWithArgumentsForConstructor()拡張メソッドは、クラスのコンストラクタを呼び出すことはありません。

// Specifying arguments for constructor using expression. This is refactoring friendly! 
// The constructor seen here is never actually invoked. It is an expression and it's purpose 
// is purely to communicate the constructor arguments which will be extracted from it 
var foo = A.Fake<FooClass>(x => x.WithArgumentsForConstructor(() => new FooClass("foo", "bar"))); 

しかし、私のPersonクラスのコンストラクタにブレークポイントは、以下の私のテストでトリガされます。どうして？ WithArgumentsForConstructor()を間違って使用していますか？

[Test] 
public void Constructor_With_Arguments() 
{ 
    var driver = A.Fake<Person>(x => x.WithArgumentsForConstructor(() => new Person("Jane", 42))); 
    var age = driver.GetAge(); 
    Assert.AreEqual(42, age); 
} 

スタックトレース：

MyStuff.Tests.Domain.dll!MyStuff.Tests.Domain.Driver.Person(string name, int age) Line 61 C# 
DynamicProxyGenAssembly2!Castle.Proxies.DriverProxy.DriverProxy(Castle.DynamicProxy.IInterceptor[] value, string value, int value) Unknown 
[Native to Managed Transition] 
[Managed to Native Transition] 
mscorlib.dll!System.RuntimeType.CreateInstanceImpl(System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, ref System.Threading.StackCrawlMark stackMark) Unknown 
mscorlib.dll!System.Activator.CreateInstance(System.Type type, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes) Unknown 
mscorlib.dll!System.Activator.CreateInstance(System.Type type, object[] args) Unknown 
FakeItEasy.dll!Castle.DynamicProxy.ProxyGenerator.CreateClassProxyInstance(System.Type proxyType, System.Collections.Generic.List<object> proxyArguments, System.Type classToProxy, object[] constructorArguments) Unknown 
FakeItEasy.dll!Castle.DynamicProxy.ProxyGenerator.CreateClassProxy(System.Type classToProxy, System.Type[] additionalInterfacesToProxy, Castle.DynamicProxy.ProxyGenerationOptions options, object[] constructorArguments, Castle.DynamicProxy.IInterceptor[] interceptors) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.CastleDynamicProxy.CastleDynamicProxyGenerator.GenerateClassProxy(System.Type typeOfProxy, System.Collections.Generic.IEnumerable<object> argumentsForConstructor, Castle.DynamicProxy.IInterceptor interceptor, System.Collections.Generic.IEnumerable<System.Type> allInterfacesToImplement) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.CastleDynamicProxy.CastleDynamicProxyGenerator.DoGenerateProxy(System.Type typeOfProxy, System.Collections.Generic.IEnumerable<System.Type> additionalInterfacesToImplement, System.Collections.Generic.IEnumerable<object> argumentsForConstructor, Castle.DynamicProxy.IInterceptor interceptor) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.CastleDynamicProxy.CastleDynamicProxyGenerator.CreateProxyGeneratorResult(System.Type typeOfProxy, System.Collections.Generic.IEnumerable<System.Type> additionalInterfacesToImplement, System.Collections.Generic.IEnumerable<object> argumentsForConstructor, FakeItEasy.Core.IFakeCallProcessorProvider fakeCallProcessorProvider) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.CastleDynamicProxy.CastleDynamicProxyGenerator.GenerateProxy(System.Type typeOfProxy, System.Collections.Generic.IEnumerable<System.Type> additionalInterfacesToImplement, System.Collections.Generic.IEnumerable<object> argumentsForConstructor, FakeItEasy.Core.IFakeCallProcessorProvider fakeCallProcessorProvider) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.CastleDynamicProxy.CastleDynamicProxyGenerator.GenerateProxy(System.Type typeOfProxy, System.Collections.Generic.IEnumerable<System.Type> additionalInterfacesToImplement, System.Collections.Generic.IEnumerable<object> argumentsForConstructor, System.Collections.Generic.IEnumerable<System.Reflection.Emit.CustomAttributeBuilder> customAttributeBuilders, FakeItEasy.Core.IFakeCallProcessorProvider fakeCallProcessorProvider) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.ProxyGeneratorSelector.GenerateProxy(System.Type typeOfProxy, System.Collections.Generic.IEnumerable<System.Type> additionalInterfacesToImplement, System.Collections.Generic.IEnumerable<object> argumentsForConstructor, System.Collections.Generic.IEnumerable<System.Reflection.Emit.CustomAttributeBuilder> customAttributeBuilders, FakeItEasy.Core.IFakeCallProcessorProvider fakeCallProcessorProvider) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.FakeObjectCreator.GenerateProxy(System.Type typeOfFake, FakeItEasy.Creation.FakeOptions fakeOptions, System.Collections.Generic.IEnumerable<object> argumentsForConstructor) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.FakeObjectCreator.CreateFake(System.Type typeOfFake, FakeItEasy.Creation.FakeOptions fakeOptions, FakeItEasy.Creation.IDummyValueCreationSession session, bool throwOnFailure) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.DefaultFakeAndDummyManager.CreateFake(System.Type typeOfFake, FakeItEasy.Creation.FakeOptions options) Unknown 
FakeItEasy.dll!FakeItEasy.Creation.DefaultFakeCreatorFacade.CreateFake<SysSurge.DynMock.Tests.Domain.Driver>(System.Action<FakeItEasy.Creation.IFakeOptionsBuilder<SysSurge.DynMock.Tests.Domain.Driver>> options) Unknown 

...

Answer 1

あなたは右のそれを使用しています。

しかし間違っていることを理解しています。

// The constructor seen here is never actually invoked... 

これは、この場所でコンストラクタを正確に呼び出さないことを意味します。この式を解析し、その中のどこかでコンストラクタを呼び出すためにパラメータを使用します。しかし、は、コンストラクタを呼び出します。

これをチェックすると、ブレークポイントを式のすぐ内側に置くことができます。