我正在通过 Contoso 示例进行一些 TDD 练习,并且我的检索学生测试通过了。
我创建新学生的测试失败了(尽管实际代码有效),因为我相信 DBContext 没有被模拟。
为了通过这个测试,我应该重构什么?
测试失败:
Contoso.Tests.Controllers.StudentControllerTest.Create_HttpPost_Should_Save_New_Student: 预期:9 但是是:8
这是具体的 UnitOfWork
public class UnitOfWork : IUnitOfWork
{
private SchoolContext context = new SchoolContext();
private IStudentsRepository studentsRepository;
private bool disposed = false;
public IStudentsRepository StudentsRepository
{
get
{
if (this.studentsRepository == null)
{
this.studentsRepository = new StudentsRepository(context);
}
return studentsRepository;
}
}
public void Save()
{
context.SaveChanges();
}
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
context.Dispose();
}
}
this.disposed = true;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}
学生 Controller
public class StudentController : Controller
{
private IUnitOfWork _unitOfWork;
public StudentController(IUnitOfWork unitOfWork)
{
this._unitOfWork = unitOfWork;
}
...
[HttpPost]
public ActionResult Create(Student student)
{
if (ModelState.IsValid)
{
_unitOfWork.StudentsRepository.Add(student);
_unitOfWork.StudentsRepository.Save();
return RedirectToAction("Details", new { id = student.StudentID });
}
return View(student);
}
...
}
这是我模拟 IUnitOfWork 的地方
public static IUnitOfWork MockUnitOfWork(List<Student> students)
{
var mockUnitOfWork = new Mock<IUnitOfWork>();
mockUnitOfWork.Setup(x => x.StudentsRepository.Students()).Returns(students.AsQueryable());
return mockUnitOfWork.Object;
}
这是失败的测试
private IUnitOfWork unitOfWork = UnitTestHelpers.MockUnitOfWork(testData);
...
[Test]
public void Create_HttpPost_Should_Save_New_Student()
{
// Arrange
var studentsCount = unitOfWork.StudentsRepository.Students().Count();
var controller = new StudentController(unitOfWork);
var student = Fakes.FakeStudentsData.CreateStudent();
// Act
var result = controller.Create(student);
// Assert
Assert.AreEqual(studentsCount+1, unitOfWork.StudentsRepository.Students().Count());
Assert.IsInstanceOf(typeof(RedirectToRouteResult), result);
}
最佳答案
看起来 StudentRepository 的 Add 方法也需要被模拟。我不确定语法是否正确,但请尝试以下操作:
public static IUnitOfWork MockUnitOfWork(List<Student> students)
{
var mockUnitOfWork = new Mock<IUnitOfWork>();
mockUnitOfWork.Setup(x => x.StudentsRepository.Students()).Returns(students.AsQueryable());
mockUnitOfWork.Setup(x => x.StudentsRepository.Add(It.IsAny<Student>())).Callback<Student>((s) => students.Add(s));
return mockUnitOfWork.Object;
}
关于unit-testing - 使用 Moq 和 EF 4.1 模拟 UnitOfWork,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6809902/