如何使用Microsoft Fakes为基类获取填充程序？

Question

class Parent{
   public string Name{ get; set; }
}

class Child :Parent{
   public string  address{ get; set; }
}

[TestClass]
class TestClass{
   [TestMethod]
   public void TestMethod()
   {
      var c = new Fakes.Child();
      c.addressGet = "foo"; // I can see that
      c.NameGet = "bar"; // This DOES NOT exists
   }
}

如何在上面的代码示例中设置"名称"？

Answer 1

生成的类Parent将具有如下构造函数:ShimParent(Parent p).

你需要做的就是:

var child = new ShimChild();
var parent = new ShimParent(child);

并在相应的Shim上设置适当的值.

Answer 2

你必须在基类上声明它.最简单的方法是将基类调用为AllInstances属性:

[TestClass]
public class UnitTest1
{
    [TestMethod]
    public void TestMethod1()
    {
        ClassLibrary1.Child myChild = new ClassLibrary1.Child();

        using (ShimsContext.Create())
        {
            ClassLibrary1.Fakes.ShimChild.AllInstances.addressGet = (instance) => "foo";
            ClassLibrary1.Fakes.ShimParent.AllInstances.NameGet = (instance) => "bar";

            Assert.AreEqual("foo", myChild.address);
            Assert.AreEqual("bar", myChild.Name);
        }

    }
}

也总是尝试添加ShimsContext以确保正确清洁垫片.否则,您的其他单元测试也将获得您之前声明的返回值.有关ShimsContext的信息,请访问:http://msdn.microsoft.com/en-us/library/hh549176.aspx#ShimsContext