11

我正在使用 Ninject.Extensions.Factory 和 Ninject 3 创建一个工厂，它IFoo根据提供给工厂的字符串创建不同类型的。我有一个通过单元测试，但奇怪的是，只在 Resharper 测试运行器中。在 NCrunch 测试运行器中它失败了。这是 NCrunch 配置问题，还是我需要更改代码？

界面：

public interface IFooFactory
{
    IFoo CreateFoo(string name);
}

Ninject 绑定：

kernel.Bind<IFooFactory>().ToFactory(() => new UseFirstParameterAsNameInstanceProvider());
kernel.Bind<IFoo>().To<BarFoo>().Named("Bar");

考试：

[Test]
public void CanCreateFooTest()
{
    var factory = (IFooFactory) Kernel.GetService(typeof(IFooFactory));
    var bar = factory.CreateFoo("Bar");
    Assert.AreEqual(typeof(BarFoo), bar.GetType());
}

NCrunch 例外：

System.Reflection.TargetInvocationException : Exception has been thrown by the target of an invocation.
  ----> Ninject.ActivationException : Error activating IInterceptor using conditional implicit self-binding of IInterceptor
Provider returned null.
Activation path:
  2) Injection of dependency IInterceptor into parameter  of constructor of type IFooFactoryProxy
  1) Request for IFooFactory

Suggestions:
  1) Ensure that the provider handles creation requests properly.

   at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
   at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Ninject.Infrastructure.Language.ExtensionsForIEnumerable.ToArraySlow(IEnumerable series, Type elementType) in c:\Projects\Ninject\ninject\src\Ninject\Infrastructure\Language\ExtensionsForIEnumerable.cs:line 29
   at Ninject.Planning.Targets.Target`1.ResolveWithin(IContext parent) in c:\Projects\Ninject\ninject\src\Ninject\Planning\Targets\Target.cs:line 149
   at Ninject.Activation.Providers.StandardProvider.GetValue(IContext context, ITarget target) in c:\Projects\Ninject\ninject\src\Ninject\Activation\Providers\StandardProvider.cs:line 114
   at Ninject.Activation.Providers.StandardProvider.<>c__DisplayClass4.<Create>b__2(ITarget target) in c:\Projects\Ninject\ninject\src\Ninject\Activation\Providers\StandardProvider.cs:line 96
   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Ninject.Activation.Providers.StandardProvider.Create(IContext context) in c:\Projects\Ninject\ninject\src\Ninject\Activation\Providers\StandardProvider.cs:line 95
   at Ninject.Activation.Context.Resolve() in c:\Projects\Ninject\ninject\src\Ninject\Activation\Context.cs:line 157
   at Ninject.KernelBase.<>c__DisplayClass10.<Resolve>b__c(IBinding binding) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:line 386
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
   at Ninject.KernelBase.System.IServiceProvider.GetService(Type service) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:line 553
   at FooProject.Tests.CanCreateFooTest() in C:\Projects\FooProject ...
--ActivationException
   at Ninject.Activation.Context.Resolve() in c:\Projects\Ninject\ninject\src\Ninject\Activation\Context.cs:line 165
   at Ninject.KernelBase.<>c__DisplayClass10.<Resolve>b__c(IBinding binding) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:line 386
   at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
   at System.Linq.Enumerable.<CastIterator>d__b1`1.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
4

4 回答 4

10

进入单元测试库的 NCrunch 配置，并将Copy referenced assembly to workspace设置为True。

NCrunch 配置截图

于 2013-05-09T12:14:45.507 回答
7

这里是与 NCrunch 一起使用的代码：

        var kernel = new StandardKernel();
        kernel.Bind<IFooFactory>().ToFactory(() => new UseFirstParameterAsNameInstanceProvider());
        kernel.Bind<IFoo>().To<BarFoo>().Named("Bar");
        kernel.Load<FuncModule>();

        var factory = kernel.Get<IFooFactory>();
        var bar = factory.CreateFoo("Bar");
        Assert.Equal(typeof(BarFoo), bar.GetType());

更新

这很好用，并且整理了 NCrunch。但是，Resharper 抱怨它已经加载了两次。解决方法：

    #if NCRUNCH
        Kernel.Load<FuncModule>(); 
    #endif
于 2012-05-15T13:48:27.327 回答
5

使用该 TestRunner 运行时，未加载 FuncModule。如果扩展未复制到已执行进程的启动目录，则会发生这种情况。

我不NCrunch。所以我不能告诉你它在做什么。但很可能它以不同于 R# 测试运行器的方式复制程序集。您可以手动加载扩展，但这感觉就像一个 hack。

于 2012-05-15T13:25:25.543 回答
2

我一直在使用哈里约特的建议一年左右。但是这个问题也发生在我们的 TFS-Buildserver 上。所以现在我避免 Ninject 自动加载所有扩展并手动加载它们。这避免了#if,#endif并且相同的代码将在 Resharper 和 NCrunch 上运行：

var kernel = new StandardKernel(new NinjectSettings { LoadExtensions = false});
kernel.Load<FuncModule>();

其余不变：

kernel.Bind<IFooFactory>().ToFactory(() => new UseFirstParameterAsNameInstanceProvider());
kernel.Bind<IFoo>().To<BarFoo>().Named("Bar");

var factory = kernel.Get<IFooFactory>();
var bar = factory.CreateFoo("Bar");
Assert.Equal(typeof(BarFoo), bar.GetType());
于 2015-11-27T18:47:49.803 回答