c#-4.0 - Workflow Foundation - Literal 仅支持值类型和不可变类型 System.String

Question

我对名为 MyCodeActivity 的 WF 代码事件进行了以下单元测试:

[ExpectedException(typeof(ArgumentException))]
[TestMethod]
public void ShouldRequireParam()
{
    //arrange
    var invoker = new WorkflowInvoker(new MyCodeActivity()
    {
        MyInt = 2,
        MyComplexObject = _complexObject
    });

    //act
    invoker.Invoke();

    //assert
    Assert.Fail("Expected ArgumentException");
}

当我运行测试时，出现以下异常

'Literal< MyComplexObject>': Literal only supports value types and the immutable type System.String. The type MyComplexObject cannot be used as a literal.

Answer 1

要解决眼前的问题:

MyComplexObject = _complexObject

至

MyComplexObject = new InArgument<MyComplexObject>((ctx) => _complexObject)

进一步阅读:http://msdn.microsoft.com/en-us/library/ee358749.aspx .

注意:您还应该使用 Microsoft.Activities.UnitTesting NuGet 上提供了包。它使 IOC 变得更容易(因为 WF 使用服务定位器模式而不是依赖注入(inject))