C# unit-testing entity-framework objectset

如何创建 ObjectSet 的实例？

发布于 2024-11-18 08:29:03 字数 600 浏览 4 评论 0原文

我正在项目中进行 DAO 单元测试，但在使用 ObjectSet 类时遇到问题。我必须创建一个新的ObjectSet，但为了做到这一点，我不能连接到数据库。所以我无法使用 BusinessModelContainer 的 CreateObjectSet() 方法。有没有办法在没有它的情况下创建ObjectSet？

单元测试代码是这样的：

var mock = new Mock<IBusinessModelContainerWrapper>();  
ObjectSet<Student> expectedStudent = ???;  // how can I get an instance here?
StudentDao studentDao = new StudentDao(mock.Object);  

expectedStudent.Add(someObj);  
mock.Setup(c => c.Students).Returns(expectedStudent);  

Assert.AreEqual(someObj, studentDao.GetByQuery(...));

原文

I am making DAO unit tests in my project and I have a problem using the ObjectSet class. I have to create a new ObjectSet but in order to do this, I must not connect to the DB. So I can not use the BusinessModelContainer's CreateObjectSet() method. Is there is a way to create the ObjectSet without it?

The unit test code is like this:

var mock = new Mock<IBusinessModelContainerWrapper>();  
ObjectSet<Student> expectedStudent = ???;  // how can I get an instance here?
StudentDao studentDao = new StudentDao(mock.Object);  

expectedStudent.Add(someObj);  
mock.Setup(c => c.Students).Returns(expectedStudent);  

Assert.AreEqual(someObj, studentDao.GetByQuery(...));

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岁吢 2024-11-25 08:29:03

你在测试什么？除非您正在单元测试 EF 代码，否则您的单元测试中不需要真正的 ObjectSet 实例。请改用 IObjectSet 的模拟。如果没有上下文，就无法获取 ObjectSet 的实例。

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久伴你 2024-11-25 08:29:03

DAL.Moles.MDALEntities.Constructor = (a) => { };
DALEntities db = new DALEntities(); //Object Context

System.Data.Objects.Moles.MObjectContext.AllInstances.CreateObjectSet<ObjectSetType>(
(a) => { return new System.Data.Objects.Moles.MObjectSet<ObjectSetType>(); }
);

ObjectSet<ObjectSetType> dbList = db.CreateObjectSet<ObjectSetType>();

DAL.Moles.MDALEntities.Constructor = (a) => { };
DALEntities db = new DALEntities(); //Object Context

System.Data.Objects.Moles.MObjectContext.AllInstances.CreateObjectSet<ObjectSetType>(
(a) => { return new System.Data.Objects.Moles.MObjectSet<ObjectSetType>(); }
);

ObjectSet<ObjectSetType> dbList = db.CreateObjectSet<ObjectSetType>();

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