【发布时间】：2022-04-23 15:30:31
【问题描述】：
在我的应用程序中，我有通过 UnitOfWork 连接到控制器的通用存储库。我想对我的应用程序进行单元测试。为此，我需要模拟数据库连接。 你能告诉我应该怎么做吗？模拟回购？模拟回购和 UnitOfWork？对于任何代码 sn-ps/建议，我将不胜感激。 这是我的回购：
public class GenericRepository<TEntity> where TEntity : class
{
internal EquipmentEntities context;
internal DbSet<TEntity> dbSet;
public GenericRepository(EquipmentEntities context)
{
this.context = context;
this.dbSet = context.Set<TEntity>();
}
public virtual IEnumerable<TEntity> Get(
List<Expression<Func<TEntity, bool>>> filter,
Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBy = null,
int? Page=0,
params Expression<Func<TEntity, object>>[] included)
{
IQueryable<TEntity> query = dbSet;
foreach(var z in included)
{
query=query.Include(z);
}
if (orderBy != null)
{
query = orderBy(query);
query = query.Skip((Page.Value - 1) * 30).Take(30);
}
if (filter != null)
{
foreach (var z in filter)
{
query = query.Where(z);
}
}
return query.ToList();
}
public virtual TEntity GetByID(object id)
{
return dbSet.Find(id);
}
public virtual void Insert(TEntity entity)
{
dbSet.Add(entity);
}
public virtual void Delete(object id)
{
TEntity entityToDelete = dbSet.Find(id);
Delete(entityToDelete);
}
public virtual void Delete(TEntity entityToDelete)
{
if (context.Entry(entityToDelete).State == EntityState.Detached)
{
dbSet.Attach(entityToDelete);
}
dbSet.Remove(entityToDelete);
}
public virtual void Update(TEntity entityToUpdate)
{
dbSet.Attach(entityToUpdate);
context.Entry(entityToUpdate).State = EntityState.Modified;
}
}
和工作单元：
public class UnitOfWork {
private EquipmentEntities context = new EquipmentEntities();
private GenericRepository<Role> RoleRepository;
private GenericRepository<Storage> StorageRepository;
private GenericRepository<Device> DeviceRepository;
private GenericRepository<DeviceInstance> DeviceInstanceRepository;
private GenericRepository<DeviceUsage> DeviceUsageRepository;
private GenericRepository<User> UserRepository;
public GenericRepository<Role> roleRepository
{
get
{
if (this.RoleRepository == null)
{
this.RoleRepository = new GenericRepository<Role>(context);
}
return RoleRepository;
}
}
/*
* redundant code for other controllers
*/
public void Save()
{
context.SaveChanges();
}
private bool disposed = false;
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
context.Dispose();
}
}
this.disposed = true;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}
示例控制器：
public class UserController : Controller
{
//private EquipmentEntities db = new EquipmentEntities();
private UnitOfWork unitOfWork = new UnitOfWork();
// GET: /User/
public ActionResult Index(string Name, string Surname, int? Page, string submit)
{
List<Expression<Func<User, bool>>> where = new List<Expression<Func<User, bool>>>();
if (!string.IsNullOrEmpty(Name))
{
where.Add(w => w.Name.Contains(Name));
}
if (!string.IsNullOrEmpty(Surname))
{
where.Add(w => w.Surname.Contains(Surname));
}
var users = unitOfWork.userRepository.Get(where, null, Page, u => u.Role);
return View(users);
}
// GET: /User/Details/5
public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
User user = unitOfWork.userRepository.GetByID(id.Value);
//User user = db.Users.Find(id);
if (user == null)
{
return HttpNotFound();
}
return View(user);
}
// GET: /User/Create
public ActionResult Create()
{
ViewBag.RoleId = new SelectList(unitOfWork.roleRepository.Get(null), "Id", "RoleName");
return View();
}
// POST: /User/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include="Id,EmployeeNo,Name,Surname,ContactInfo,RoleId")] User user)
{
if (ModelState.IsValid)
{
unitOfWork.userRepository.Insert(user);
unitOfWork.Save();
return RedirectToAction("Index");
}
ViewBag.RoleId = new SelectList(unitOfWork.roleRepository.Get(null), "Id", "RoleName", user.RoleId);
return View(user);
}
// GET: /User/Edit/5
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
User user = unitOfWork.userRepository.GetByID(id.Value);
if (user == null)
{
return HttpNotFound();
}
ViewBag.RoleId = new SelectList(unitOfWork.roleRepository.Get(null), "Id", "RoleName", user.RoleId);
return View(user);
}
// POST: /User/Edit/5
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit([Bind(Include="Id,EmployeeNo,Name,Surname,ContactInfo,RoleId")] User user)
{
if (ModelState.IsValid)
{
unitOfWork.userRepository.Update(user);
unitOfWork.Save();
return RedirectToAction("Index");
}
ViewBag.RoleId = new SelectList(unitOfWork.roleRepository.Get(null), "Id", "RoleName", user.RoleId);
return View(user);
}
// GET: /User/Delete/5
public ActionResult Delete(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
User user = unitOfWork.userRepository.GetByID(id.Value);
if (user == null)
{
return HttpNotFound();
}
if (unitOfWork.deviceUsageRepository.Get(null).Where(w => w.UserId == id) != null)
{
ViewBag.Error = 1;
ModelState.AddModelError("", "Nie można kasować uyztkownika z przypisanymi urządzeniami");
}
else
{
ViewBag.Error = 0;
}
return View(user);
}
// POST: /User/Delete/5
[HttpPost, ActionName("Delete")]
[ValidateAntiForgeryToken]
public ActionResult DeleteConfirmed(int id)
{
User user = unitOfWork.userRepository.GetByID(id);
unitOfWork.deviceUsageRepository.Delete(user);
unitOfWork.Save();
return RedirectToAction("Index");
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
unitOfWork.Save();
}
base.Dispose(disposing);
}
}
【问题讨论】：
-
您应该测试每个存储库并测试您的 UnitOfWork 类，以确保它使用正确的数据库连接创建正确的存储库。为此，您应该模拟 EF 上下文 - 您可以将其简化为设置一个虚拟单元测试数据库并连接到该数据库，或者使用内存数据库，如 Effort
标签： c# unit-testing mocking