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();
}
}
}
如果我运行应用程序,这可以正常工作。问题是我将如何对Repository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());
}
}
更新:
我可以创建IObjectContextPerRequest接口和ObjectContextPerRequest,如下所示:
public interface IObjectContextPerRequest
{
EStudyTestDatabaseEntities Context { get; }
void RemoveContext();
}
现在我可以按如下方式编写测试:
[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());
}
}
答案 0 :(得分:2)
您可以定义两个存储库构造函数,并在测试中使用一个,第二个在应用程序中:
public class Repository
{
private ObjectContext _ctx;
public Repository()
{
_ctx = ObjectContextPerRequest.Context;
}
public Repository(ObjectContext ctx)
{
_ctx = ctx;
}
}
如果你使用了IOC容器,你只能定义一个构造函数,但这更需要解释。
使用构造函数测试将更容易编写:
[TestFixture]
public class when_getting_all_roles
{
[Test]
public void should_get_roles_successfully()
{
var repository = new RoleRepository(new EStudyTestDatabaseEntities());
Assert.AreNotEqual(4,repository.GetAll());
}
}