Question

使用Moq对创建了Stack的视图模型的MVC 4操作方法进行了以下测试：

// GET: /Home/SowingAndHarvesting
public ActionResult SowingAndHarvesting()
{
    // Months are used for the CSS classes 
    // to add to the squares and for displayal within the square.
    var months = MonthHelper.GetAllMonths().ToList();

    // Ordering for the squared boxes view (4 columns for the seasons)
    var monthIndexOrdering = new[] { 7, 4, 1, 10, 
                                     6, 3, 0,  9, 
                                     5, 2, 11, 8 };
    var displayMonthsOrdered = new Stack<MonthViewModel>();
    foreach (var monthIndex in monthIndexOrdering)
    {
        var month = months[monthIndex];
        var name = month.ToString();
        var monthViewModel = new MonthViewModel(name);

        displayMonthsOrdered.Push(monthViewModel);
    }

    var viewModel = new SowingAndHarvestingViewModel 
    {
        // Months in the squared and information belonging to the month
        OrderedMonthViewModels = displayMonthsOrdered
    };

    return View(viewModel);
}

MonthViewModel就像这样（它有一些显示的属性，为简洁起见，SowingAndHarvestingViewModel是一个包装器）：

public class MonthViewModel
{
    public MonthViewModel(string monthName)
    {
        MonthForDataAttribute = monthName.ToLower();
    }

    public string MonthForDataAttribute { get; set; }
}

测试如下：

[TestFixture]
public class HomeControllerTest
{

    [Test]
    public void Controllers_SowingAndHarvesting_DataMonthOrdering()
    {
        // Arrange
        var expectedMonthOrdering =  return new Stack<MonthViewModel>(new[] 
            {   
                new MonthViewModel("august"), 
                new MonthViewModel("may"),
                new MonthViewModel("february"),
                new MonthViewModel("november"),
                new MonthViewModel("july"),
                new MonthViewModel("april"),
                new MonthViewModel("january"),
                new MonthViewModel("october"),     
                new MonthViewModel("june"),
                new MonthViewModel("march"),
                new MonthViewModel("december"),
                new MonthViewModel("september")       
            });  ;

        var mock = new Mock<ICalendarService>();
        mock.Setup(c => c.GetMonthsWithAction())
            .Returns(It.IsAny<Month>);
        var controller = new HomeController(mock.Object);

        // Act
        var result = (SowingAndHarvestingViewModel)((ViewResult)controller.SowingAndHarvesting()).Model;

        // Assert
        while (expectedMonthOrdering.Count != 0)
        {
            var expected = expectedMonthOrdering.Pop().MonthForDataAttribute;
            var actual = result.OrderedMonthViewModels.Pop().MonthForDataAttribute;

            Assert.AreEqual(expected, actual,
                "The months in the data attributes should be in the correct order and format.");
        }
    }

现在，当我单独运行此测试时，它会通过。但是，当我与其他测试一起运行时，它会失败并显示消息：

System.TypeInitializationException：Moq.Mock`1的类型初始值设定项引发了异常 ----＆GT; System.TypeInitializationException：Moq.Proxy.CastleProxyFactory的类型初始化程序抛出异常 ----＆GT; System.NullReferenceException：未将对象引用设置为对象的实例

有谁知道为什么会这样，以及如何解决？

Answer 1

如果您使用的是.Net Framework 4.6和Web API，则由于最近对Castle.Core进行了更新，您可能会遇到此错误。将Castle.Core更新到v4.2.0将导致此错误，因此请尝试将Castle.Core NuGet包滚回4.1.1版

Answer 2

我正在运行Mono 3.12，如mono -V所示。使用sudo apt-get install mono-complete更新为Mono 4可解决此问题！

不在隔离运行测试时由Moq.Proxy.CastleProxyFactory的类型初始化程序抛出的异常

2 个答案: