FindView返回的模拟视图

Question

我想模拟(使用MOQ)由Findview方法返回的视图，如下所示，这样视图就不是空的：

if ((ViewEngines.Engines.FindView(ControllerContext, viewName, masterName)).View == null)
            {
                viewName = SomeViewName;
            }

我模仿过这样的viewengine，例如在线：

var mockViewEngine = new Mock<IViewEngine>();
        // Depending on what result you expect you could set the searched locations
        // and the view if you want it to be found
        Mock<IView> view = new Mock<IView>();
        var result = new ViewEngineResult(new[] { "location1", "location2" });

        // Stub the FindView method
        mockViewEngine
            .Setup(x => x.FindView(It.IsAny<ControllerContext>(), It.IsAny<string>(), It.IsAny<string>(), false))
            .Returns(result);

        // Use the mocked view engine instead of WebForms
        ViewEngines.Engines.Clear();
        ViewEngines.Engines.Add(mockViewEngine.Object);

但是当我运行test时，它给出了这个错误：

System.NullReferenceException : Object reference not set to an instance of an object.
at System.Web.Mvc.ViewEngineCollection.Find(Func`2 cacheLocator, Func`2 locator)

Answer 1

在设置FindView方法时，应该使用It.IsAny < bool >而不只是false。