最小起订量会否覆盖以前的设置？

Question

嗨，我正在尝试使用两个可能的输入来设置类方法的模拟。当我检查输出时，仅最后一次设置会返回预期输出。第一个没有。任何帮助深表感谢。

[Test]
public void ClimbOnceTwoNeighbour_Sample()
{
    stateConverter = new Mock<StateConverter>();

    solution = new Mock<Solution>();
    state = new Mock<State>();

    var neightbourSolution1 = new Mock<Solution>();
    var neighbourState1 = new Mock<State>();
    var neightbourSolution2 = new Mock<Solution>();
    var neighbourState2 = new Mock<State>();

    stateConverter.Setup(x => x.FromSolution(neightbourSolution1.Object, It.IsAny<State>())).Returns(neighbourState1.Object);
    stateConverter.Setup(x => x.FromSolution(neightbourSolution2.Object, It.IsAny<State>())).Returns(neighbourState2.Object);

    var state1 = stateConverter.Object.FromSolution(neightbourSolution1.Object, state.Object);//return null ????
    var state2 = stateConverter.Object.FromSolution(neightbourSolution2.Object, state.Object);//return neighbourState2.Object)


    Assert.AreEqual(neighbourState2.Object, state2);//pass test here
    Assert.AreEqual(neighbourState1.Object, state1);//fail here due to null is returned from previous statement

}

Answer 1

我已复制您的代码片段并创建空类以使其编译。它按预期工作。请尝试一下并让我知道结果是什么。

这是代码：

using Moq;

namespace ConsoleApplication1
{
class Program
{
    static void Main(string[] args)
    {
        var stateConverter = new Mock<StateConverter>();

        var solution = new Mock<Solution>();
        var state = new Mock<State>();

        var neightbourSolution1 = new Mock<Solution>();
        var neighbourState1 = new Mock<State>();
        var neightbourSolution2 = new Mock<Solution>();
        var neighbourState2 = new Mock<State>();

        stateConverter.Setup(x => x.FromSolution(neightbourSolution1.Object, It.IsAny<State>())).Returns(neighbourState1.Object);
        stateConverter.Setup(x => x.FromSolution(neightbourSolution2.Object, It.IsAny<State>())).Returns(neighbourState2.Object);

        var state1 = stateConverter.Object.FromSolution(neightbourSolution1.Object, state.Object);
        var state2 = stateConverter.Object.FromSolution(neightbourSolution2.Object, state.Object);
    }
}

public class State{}

public class Solution{}

public abstract class StateConverter
{
    public abstract State FromSolution(Solution p0, State isAny);
}

}