模拟对象中的方法不是从 sut 调用的

Question

我为我的纸牌游戏制作 MSTest。我有 Player class（它取决于 IStrategy 接口），它有一个调用 interface.Attack() 方法的方法 Attack()。 Mock<IStrategy> 已创建并设置 strategy.Attack()。但是当Player.Attack被调用时，mock.Attack没有被调用。

我做错了什么？

    public class Player : IPlayer
    {
        public List<Card> CardsOnHands { get; }
        public IStrategy Strategy { get; }

        public Player(IStrategy strategy)
        {
            Strategy = strategy;
            CardsOnHands = new List<Card>();
        }

        public Card Attack(List<Card> CardsOnTable)
        {
           return Strategy.Attack(CardsOnHands, CardsOnTable);
        }
    }

我的测试如下

    [TestMethod]
    public void PlayerAttackShouldReturnCard()
    {
        //Arrange
        var StrategyMock = new Mock<IStrategy>();
        ExpectedCard = new Card(1, "fakeName", "fakeSuit", true);
        CardList = new List<Card>
        {
        new Card(1, "", "", true),
        new Card(1, "", "", true),
        new Card(1, "", "", true)
        };

        StrategyMock
            .Setup(x => x.Attack(CardList, CardList))
            .Returns(ExpectedCard);
        var _player = new Player (StrategyMock.Object);
        //Act
        Card actualCard = _player.Attack(CardList);
        //Assert
        StrategyMock.Verify(x => x.Attack(CardList, CardList), Times.Exactly(1));
        Assert.AreEqual(ExpectedCard, actualCard);
    }

Verify 失败

Answer 1

您必须显式地将模拟接口注入主题 class (_player)。

当前示例未显示您在哪里执行此操作。

它需要看起来像

[TestMethod]
public void PlayerAttackShouldReturnCard() {
    //Arrange
    var strategyMock = new Mock<IStrategy>();
    var expectedCard = new Card(1, "fakeName", "fakeSuit", true);
    var tableCards = new List<Card> {
        new Card(1, "", "", true),
        new Card(1, "", "", true),
        new Card(1, "", "", true)
    };

    strategyMock
        .Setup(x => x.Attack(It.IsAny<List<Card>>(), tableCards))
        .Returns(expectedCard)
        .Verifiable();

    Player _player = new Player(strategyMock.Object); //<--- explicit injection here

    //Act
    Card actualCard = _player.Attack(TableCards);

    //Assert
    strategyMock.Verify();
    Assert.AreEqual(expectedCard, actualCard);
}

模拟对象中的方法不是从 sut 调用的

Method in Mocked object is not called from sut

c#

unit-testing

moq