我是Moq的新手,现在正试图为System.Reflection.Assembly
类创建一个模拟器。我正在使用此代码:
var mockAssembly = new Mock<Assembly>();
mockAssembly.Setup( x => x.GetTypes() ).Returns( new Type[] {
typeof( Type1 ),
typeof( Type2 )
} );
但是当我运行测试时,我得到下一个异常:
System.ArgumentException : The type System.Reflection.Assembly
implements ISerializable, but failed to provide a deserialization
constructor
Stack Trace:
at
Castle.DynamicProxy.Generators.BaseProxyGenerator.VerifyIfBaseImplementsGetObjectData(Type
baseType)
at
Castle.DynamicProxy.Generators.ClassProxyGenerator.GenerateCode(Type[]
interfaces, ProxyGenerationOptions options)
at Castle.DynamicProxy.DefaultProxyBuilder.CreateClassProxy(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[T](ICallInterceptor
interceptor, Type[] interfaces, Object[] arguments)
at Moq.Mock`1.<InitializeInstance>b__0()
at Moq.PexProtector.Invoke(Action action)
at Moq.Mock`1.InitializeInstance()
at Moq.Mock`1.OnGetObject()
at Moq.Mock`1.get_Object()
你能告诉我用Moq模拟ISerializable
类(如System.Reflection.Assembly
)的正确方法吗?
提前致谢!
问题不在于ISerializable接口。您可以模拟ISerializable类。
请注意异常消息:
System.Reflection.Assembly类型实现ISerializable,但未能提供反序列化构造函数
问题是,Assembly没有提供反序列化构造函数。
System.Reflection.Assembly是抽象的,因此您无法创建它的新实例。但是,你可以创建一个测试类,然后模拟它。
例:
[TestMethod] public void TestSomethingThatNeedsAMockAssembly() { string title = "title";
var mockAssembly = new Mock();
mockAssembly.Setup(a => a.GetCustomAttributes(It.Is(s => s == Type.GetType("System.Reflection.AssemblyTitleAttribute")), It.IsAny())).Returns(new System.Attribute[] { new AssemblyTitleAttribute(title) } );var c = new ClassThatTakesAssemblyAndParsesIt(mockAssembly.Object); Assert.IsTrue(c.AssemblyTitle == title); //etc } public class TestAssembly : Assembly { public TestAssembly() { //could probably do something interesting here } }
正如已经解释的那样,问题是Assembly没有公开反序列化构造函数。这并不意味着它无法完成。
根据您的示例使用Moq的解决方案是:
var mock = new Mock<_Assembly>();
result.Setup(/* do whatever here as usual*/);
请注意,要使用_Assembly
,您需要参考System.Runtime.InteropServices
您可以尝试创建动态程序集并从中构建,而不是模拟。
var appDomain = AppDomain.CurrentDomain;
var assembly = appDomain.DefineDynamicAssembly(new AssemblyName("Test"), AssemblyBuilderAccess.ReflectionOnly);
我只需要验证嵌入式资源是否正常工作;这对我的情况有用:
public class MockableAssembly : Assembly { }
[TestClass]
public class ApplicationSetupTests
{
[TestMethod]
public void ApplyAsposeLicense_Success()
{
var mockAssembly = new Mock<MockableAssembly>();
mockAssembly.Setup(a => a.GetManifestResourceStream(It.IsAny<string>())).Returns(mockedData);
MethodIAmTesting(mockAssembly.Object);
mockAssembly.Verify(a => a.GetManifestResourceStream("myString"), Times.Once);
}