return类型为Void的私有方法的Assert阶段怎么办？

Question

我有一个 class 有一个私有方法

public class MyClass 
{
    private void SomeMethod(PrimaryAllocationDP packet)
    {
        ........................
        some code
        ........................
        packet.AllocatedAgency = AgencyAllocated;
    }
}

现在通过使用MSUnit测试框架，我已经写到这里了

[TestMethod]
public void TestAllocatedAgency()
{ 

    var packet = new Fixture().Create<PrimaryAllocationDP>(); //used AutoFixture here

    PrivateObject accessor = new PrivateObject(new MyClass());     

    accessor.Invoke("SomeMethod", packet); //Act

    // what will be the Assert? Since it is void
}

Assert 是什么？既然是void，怎么写assert呢？

Answer 1

好吧，在示例中，被测方法正在对其 argument/dependency 进行更改，您可以断言调用该函数的预期结果是数据包的 AllocatedAgency 属性实际上不是 null

[TestMethod]
public void TestAllocatedAgency() { 
    //Arrange
    var packet = new Fixture().Create<PrimaryAllocationDP>(); //used AutoFixture here
    var sut = new MyClass();
    var accessor = new PrivateObject(sut);     

    //Act
    accessor.Invoke("SomeMethod", packet);

    //Assert
    Assert.IsNotNull(packet.AllocatedAgency);
}

Answer 2

如果您可以更改 PrimaryAllocationDP，您还可以添加新界面 IPrimaryAllocationDP 并测试属性设置。在我的测试中，我假设 AllocatedAgency 是对象类型并且我正在使用 Moq。但也许您也可以使用 AutoFixture 进行模拟？为了更清楚，我直接在 MyClass

中设置了 AgencyAllocated

[TestFixture]
public class DependencyInjection
{
    [TestMethod]
    public void TestAllocatedAgency()
    {
        var packet = new Mock<IPrimaryAllocationDP>();

        PrivateObject accessor = new PrivateObject(new MyClass());

        accessor.Invoke("SomeMethod", packet.Object); //Act

        packet.VerifySet(p => p.AllocatedAgency = 42);
    }
}

public interface IPrimaryAllocationDP
{
    //object or any other type
    object AllocatedAgency { set; }
}

public class PrimaryAllocationDP : IPrimaryAllocationDP
{
    public object AllocatedAgency { set; private get; }
}

public class MyClass
{
    private readonly object AgencyAllocated = 42;

    private void SomeMethod(IPrimaryAllocationDP packet)
    {
        //........................
        //some code
        //........................
        packet.AllocatedAgency = AgencyAllocated;
    }
}

return类型为Void的私有方法的Assert阶段怎么办？

How to do the Assert phase of a private method whose return type is Void?

c#

unit-testing

private-methods