在 MSTest 中模拟 ASP.NET Core 中的 TempData

Question

public ActionResult View(string name)
{
    if (TempData["SessionVariable"] != null)
    {
        FileName = name;  
        return View();
    }
    else
    {  
        return RedirectToAction("index", "Home");
    }

}

测试方法

public void UseCaseView_CorrectRequirements()
{
    var mock = new Mock<Controller>();
    mock.Setup(p => p.TempData["SessionVariable"]).Returns("admin");
    Controller.View("SAMPLE.xml");           
}

它抛出一个错误，例如，

结果堆栈跟踪：

at Moq.Mock.ThrowIfSetupExpressionInvolvesUnsupportedMember(Expression setup, MethodInfo method) in C:\projects\moq4\Source\Mock.cs:line 883 at Moq.Mock.SetupGetPexProtected[T,TProperty](Mock1 mock, Expression1 expression, Condition condition) in C:\projects\moq4\Source\Mock.cs:line 537 at Moq.Mock.SetupGet[T,TProperty](Mock1 mock, Expression1 expression, Condition condition) in C:\projects\moq4\Source\Mock.cs:line 517 at Moq.Mock.SetupPexProtected[T,TResult](Mock1 mock, Expression1 expression, Condition condition) in C:\projects\moq4\Source\Mock.cs:line 507 at Moq.Mock.Setup[T,TResult](Mock1 mock, Expression1 expression, Condition condition) in C:\projects\moq4\Source\Mock.cs:line 484 at Moq.QueryableMockExtensions.FluentMock[T,TResult](Mock1 mock, Expression1 setup) in C:\projects\moq4\Source\Linq\Mocks.cs:line 224 at lambda_method(Closure ) at Moq.Mock.GetTargetMock(Expression fluentExpression, Mock mock) in C:\projects\moq4\Source\Mock.cs:line 856 at Moq.Mock.SetupPexProtected[T,TResult](Mock1 mock, Expression1 expression, Condition condition) in C:\projects\moq4\Source\Mock.cs:line 505 at Moq.Mock.Setup[T,TResult](Mock1 mock, Expression1 expression, Condition condition) in C:\projects\moq4\Source\Mock.cs:line 484 at SE_WEBAPP.Tests.TestControllers.UsecaseControllerTests.UseCaseView_CorrectRequirements() in

D:\Public\SE_WEBAPP_TESTCASE\SE_WEBAPP\SE_WEBAPP.Tests\TestControllers\UsecaseControllerTests.cs:line 23

结果信息：测试方法 SE_WEBAPP.Tests.TestControllers.UsecaseControllerTests.UseCaseView_CorrectRequirements 抛出异常：System.NotSupportedException：a 上的设置无效非虚拟（在 VB 中可覆盖）成员：mock => mock.TempData

Answer 1

在asp.net-core中，Controller.TempData是一个public属性，所以你可以方便地访问它并设置想要的key/value

public void UseCaseView_CorrectRequirements() {
    // Arrange
    var httpContext = new DefaultHttpContext();
    var tempData = new TempDataDictionary(httpContext, Mock.Of<ITempDataProvider>());
    tempData["SessionVariable"] = "admin";        
    var controller = new UsecaseController() {
        TempData = tempData
    };
    var expected = "SAMPLE.xml";

    //Act
    var view = controller.View(expected) as ViewResult;
    var actual = controller.FileName;

    //Assert
    Assert.AreEqual(expected, actual);
}

在 MSTest 中模拟 ASP.NET Core 中的 TempData

Mocking a TempData in ASP.NET Core in MSTest

c#

unit-testing

mstest

moq

asp.net-core