Mock 上的设置没有 return 预期值

Question

我有一个如下所示的方法，我正在尝试为其编写单元测试。

    public IActionResult Get(string market, string program, string destination, string language, string type, string subtype) {

        var salesItemTypeNumber = (int)Enum.Parse(typeof(SalesItemType), type);

        var salesItemRequest = new SalesItemRequest {
            Market = market,
            Program = program,
            Destination = destination,
            Type = salesItemTypeNumber,
            Language = language
        };
        var loggingFields = logger.GetLoggingFields(salesItemRequest);
        var salesItems = new List<SalesItem>();

        try {
                 salesItems = repository.GetSalesItems(salesItemRequest).ToList();

            if (salesItems == null || !salesItems.Any()) {
                return StatusCode(StatusCodes.Status204NoContent);
            }

            var listOfSalesItems = salesItems.Select(salesItem => new {
                Sku = salesItem.Sku,
                Code = salesItem.Code,
                Description = salesItem.Description,
                EnglishDescription = salesItem.EnglishDescription
            }).ToList();

            return StatusCode(StatusCodes.Status200OK, listOfSalesItems);
        }
    }

我必须模拟 GetSalesItems() 方法。当我设置该方法时，它并没有 return 我期望的值，特定代码段是运行。请在下面找到单元测试方法。指导我哪里错了。

    [TestMethod]
    public void Check_Status_When_Get_Method_Is_Invoked() {
        var salesItemsList = new List<SalesItem> {
            new SalesItem {
                Sku = "BB-GB-LON",
                Code = "BB",
                Description = "Breakfast",
                EnglishDescription = "Breakfast"
            },
            new SalesItem {
                Sku = "COL1-GB-LON",
                Code = "COL1",
                Description = "Course Literature 1-6 weeks",
                EnglishDescription = "Course Literature 1-6 weeks"
            },
        };
        priceRepositoryMock.Setup(m => m.GetSalesItems(new SalesItemRequest() {
            Market = "DEB",
            Program = "ILS",
            Destination = "GB-LON",
            Language = "en"
        })).Returns(salesItemsList);

        var response = salesItemController.Get("DEB", "ILS", "GB-LON", "en", "80", string.Empty);

        Assert.AreEqual(200, ((ObjectResult) response).StatusCode);
    }

Answer 1

设置中使用的参数与被测方法中的参数不同。您可以使用像

这样的参数匹配器

It.Is<T>()

priceRepositoryMock
    .Setup(_ => _.GetSalesItems(It.Is<SalesItemRequest>(
        arg => arg.Market == "DEB" && 
                arg.Program == "ILS" && 
                arg.Destination == "GB-LON" 
                && arg.Language == "en"
    ))
    .Returns(salesItemsList);

或

It.IsAny<T>()

priceRepositoryMock
    .Setup(_ => _.GetSalesItems(It.IsAny<SalesItemRequest>()))
    .Returns(salesItemsList);

匹配传递到模拟中的参数，以便在执行测试时调用时它的行为符合预期。

参考 Moq Quickstart 以更好地了解如何在模拟框架中使用参数匹配器。

Mock 上的设置没有 return 预期值

Setup on Mock does not return expected value

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mocking