public void WritesTempDataFromTempDataDictionary_WithoutKeyPrefix() { // Arrange var httpContext = new DefaultHttpContext(); var tempData = new TempDataDictionary(httpContext, Mock.Of <ITempDataProvider>()); var filter = CreateControllerSaveTempDataPropertyFilter(httpContext, tempData: tempData); var controller = new TestController(); var controllerType = controller.GetType(); var property1 = controllerType.GetProperty(nameof(TestController.Test)); var property2 = controllerType.GetProperty(nameof(TestController.Test2)); filter.Properties = new[] { new LifecycleProperty(property1, "Test"), new LifecycleProperty(property2, "Test2"), }; var context = new ActionExecutingContext( new ActionContext { HttpContext = httpContext, RouteData = new RouteData(), ActionDescriptor = new ActionDescriptor(), }, new List <IFilterMetadata>(), new Dictionary <string, object>(), controller); // Act filter.OnActionExecuting(context); controller.Test = "New-Value"; controller.Test2 = 42; filter.OnTempDataSaving(tempData); // Assert Assert.Collection( tempData.OrderBy(i => i.Key), item => { Assert.Equal(nameof(TestController.Test), item.Key); Assert.Equal("New-Value", item.Value); }, item => { Assert.Equal(nameof(TestController.Test2), item.Key); Assert.Equal(42, item.Value); }); }