FindView 返回的模拟视图

Question

我想模拟（使用最小起订量）Findview 方法返回的视图，如下所示，以便该视图不为空：

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

我在网上模拟了这样的视图引擎：

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);

但是当我运行测试时，它给了我这个错误：

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

您应该使用 It.IsAny <布尔>而不是在设置 FindView 方法时只是 false。