我使用以下代码为每个 ASP.NET 请求创建实体框架 ObjectContext:
public static class ObjectContextPerRequest
{
public static EStudyTestDatabaseEntities Context
{
get
{
var _context = HttpContext.Current.Items["EStudyModel"] as EStudyTestDatabaseEntities;
if(_context == null)
{
_context = new EStudyTestDatabaseEntities();
HttpContext.Current.Items.Add("EStudyModel", _context);
}
return _context;
}
}
public static void RemoveContext()
{
var _context = HttpContext.Current.Items["EStudyModel"] as EStudyTestDatabaseEntities;
if(_context != null)
{
_context.Dispose();
}
}
}
在存储库中我这样使用它:
public class RoleRepository : IRoleRepository
{
public IList<Role> GetAll()
{
using(var db = ObjectContextPerRequest.Context)
{
return db.RoleSet.ToList();
}
}
}
如果我运行该应用程序,效果很好。问题是我将如何对存储库进行单元测试,因为我需要创建一个 HttpContext。
[TestFixture]
public class when_getting_all_roles
{
[Test]
public void should_get_roles_successfully()
{
var repository = new RoleRepository();
Assert.AreNotEqual(4,repository.GetAll());
}
}
UPDATE:
我可以制作 IObjectContextPerRequest 接口和 ObjectContextPerRequest ,如下所示:
public interface IObjectContextPerRequest
{
EStudyTestDatabaseEntities Context { get; }
void RemoveContext();
}
现在我可以编写我的测试如下:
[TestFixture]
public class when_getting_all_roles
{
[Test]
public void should_get_roles_successfully()
{
var objectContextPerRequestStub = MockRepository.GenerateStub<IObjectContextPerRequest>();
objectContextPerRequestStub.Expect(x => x.Context).Return(new EStudyTestDatabaseEntities());
var repository = new RoleRepository(objectContextPerRequestStub);
Assert.AreNotEqual(4,repository.GetAll());
}
}