Workflow Foundation

本文介绍了Workflow Foundation - Literal仅支持值类型和不可变类型System.String的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个名为MyCodeActivity的WF代码活动的单元测试：

I have the following unit test for a WF code activity called MyCodeActivity:

[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，我得到以下异常

When I run the test I get the following exception

'Literal< MyComplexObject>'：Literal只支持值类型和不可变类型System.String。类型MyComplexObject不能用作文字。

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

推荐答案

/ p>

To fix the immediate problem:

MyComplexObject = _complexObject

到

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

更多阅读： msdn.microsoft/en-us/library/ee358749.aspx 。

注意： strong>您还应该使用NuGet上提供的 Microsoft.Activities.UnitTesting 软件包。它使IOC更容易（看到WF工作与服务定位器模式，而不是依赖注入）

Note: You should also use the Microsoft.Activities.UnitTesting package available on NuGet. It makes IOC alot easier (seeing as WF works with the Service Locator pattern and not Dependency Injection)