C#/Moq-如何填写多级测试数据？

我是Moq新手，我想用它来编写单元测试。我有一个包含几个表的数据库，如：

EducationUser   | Application
- UsrName         - Student
- UsrPwd          - CourseId
- UsrChallenge    - Date
- IsTeacher       - Grade
- FullName

这是一个位于

localdb

上的数据库，我想模拟它。我已经使用实体框架创建了实体。这些实体的接口是

IEducationEntities

现在，我想创建一个模拟对象，并对一些Web服务进行一些测试，如：

    [TestMethod()]
    public void LoginTest()
    {
        HttpResponseMessage response = Request.CreateResponse(_accountController.Login("andrew", "DefaultPassword"));
        Assert.IsTrue(response.IsSuccessStatusCode, "User unable to log in with correct login info");

    }

为此，根据我从中了解到的情况，我应该能够做如下事情：

[TestClass()]
public class AccountControllerTests : ApiController
{
    Mock<IEducationEntities> _entities = new Mock<IEducationEntities>(MockBehavior.Strict);
    private AccountController _accountController;

public AccountControllerTests() {
        _accountController = new AccountController(_entities.Object);
        _entities.Setup(table => table.EducationUsers.UsrName).Returns("andrew");
        _entities.Setup(table => table.EducationUsers.UsrPwd).Returns("DefaultPassword");
}
[TestMethod] //etc, defining tests below

[TestClass（）]
公共类AccountControllerTests:ApiController
{
Mock _entities=新的Mock（MockBehavior.Strict）；
私人账户控制人(AccountController);；
公共账户控制员测试（）{
_accountController=新的accountController（_entities.Object）；
_entities.Setup（table=>table.EducationUsers.UsrName）.Returns（“andrew”）；
_entities.Setup（table=>table.EducationUsers.UsrPwd）.返回（“DefaultPassword”）；
}
[TestMethod]//etc，在下面定义测试

但是，这根本不起作用，因为从数据库生成的实体显然不包含关于子字段的信息，我得到了错误：

“DbSet”不包含“UsrPwd”的定义，并且 没有接受类型为的第一个参数的扩展方法“UsrPwd” 可以找到“DbSet”（您是否缺少使用 指令或组件引用？）

我缺少什么？如何用与数据库结构相同的测试数据填充

moq

对象？

（假设您使用的是版本6或更高版本）

您将执行以下操作：

[TestMethod]
public void TestSomething()    
{
   // Create the user data
   var educationUsers = new List<EducationUser>
   {
       new EducationUser
       {
           UsrName = "andrew",
           UsrPwd = "DefaultPassword"
       }
   }.AsQueryable();

   // Create the DbSet that contains the user data and wire it up to return the user data that was created above
   Mock<DbSet<EducationUser>> educationUsersDbSet = new Mock<DbSet<EducationUser>>();
   educationUsersDbSet.As<IQueryable<EducationUser>>().Setup(m => m.Provider).Returns(educationUsers.Provider);
   educationUsersDbSet.As<IQueryable<EducationUser>>().Setup(m => m.Expression).Returns(educationUsers.Expression);
   educationUsersDbSet.As<IQueryable<EducationUser>>().Setup(m => m.ElementType).Returns(educationUsers.ElementType);
   educationUsersDbSet.As<IQueryable<EducationUser>>().Setup(m => m.GetEnumerator()).Returns(educationUsers.GetEnumerator());

   // Create the mock context and wire up its EducationUsers property to return the DbSet that was created above
   var context = new Mock<IEducationEntities>();
   context.Setup(e => e.EducationUsers).Returns(educationUsersDbSet.Object);

   // Create the account controller using the mock DbContext
   _accountController = new AccountController(context.Object);

   // ... the rest of your testing code ...
}

然后你的测试方法就变成了

[TestMethod]
public void TestSomething()    
{
   // Create the user data
   var educationUsers = new List<EducationUser>
   {
       new EducationUser
       {
           UsrName = "andrew",
           UsrPwd = "DefaultPassword"
       }
   }.AsQueryable();

   // Create the DbSet that contains the user data and wire it up to return the user data that was created above
   Mock<DbSet<EducationUser>> educationUsersDbSet = new CreateMockDbSet(educationUsers);

   // Create the mock context and wire up its EducationUsers property to return the DbSet that was created above
   var context = new Mock<IEducationEntities>();
   context.Setup(e => e.EducationUsers).Returns(educationUsersDbSet.Object);

   // Create the account controller using the mock DbContext
   _accountController = new AccountController(context.Object);

   // ... the rest of your testing code ...
}

[TestMethod]
公共空间
{
//创建用户数据
var educationUsers=新列表
{
新教育用户
{
UsrName=“安德鲁”，
UsrPwd=“DefaultPassword”
}
}.AsQueryable（）；
//创建包含用户数据的数据库集，并将其连接起来以返回上面创建的用户数据
Mock educationUsersDbSet=新建的CreateMockDbSet（educationUsers）；
//创建模拟上下文并连接其EducationUsers属性以返回上面创建的DbSet
var context=newmock（）；
Setup（e=>e.EducationUsers）.Returns（educationUsersDbSet.Object）；
//使用模拟DbContext创建帐户控制器
_accountController=新的accountController（context.Object）；
//…其余的测试代码。。。
}

在您的示例表结构中，password字段被称为

UsrPassword

，但您在测试/模拟代码中称它为

UsrPwd

。在我开始实现异步/等待模式之前，我也会采用上述方法。如果您阅读提供的链接，它会解释此方法不适用于此。此外，他们为async/await提供的方法不适用于EF Core，因此请注意。我现在使用EF Core的UseInMemoryDatabase对存储库层进行单元测试，取得了很大成功。如果您对示例感兴趣，我将提供一个示例。是的，我很想看一个示例。

[TestMethod]
public void TestSomething()    
{
   // Create the user data
   var educationUsers = new List<EducationUser>
   {
       new EducationUser
       {
           UsrName = "andrew",
           UsrPwd = "DefaultPassword"
       }
   }.AsQueryable();

   // Create the DbSet that contains the user data and wire it up to return the user data that was created above
   Mock<DbSet<EducationUser>> educationUsersDbSet = new CreateMockDbSet(educationUsers);

   // Create the mock context and wire up its EducationUsers property to return the DbSet that was created above
   var context = new Mock<IEducationEntities>();
   context.Setup(e => e.EducationUsers).Returns(educationUsersDbSet.Object);

   // Create the account controller using the mock DbContext
   _accountController = new AccountController(context.Object);

   // ... the rest of your testing code ...
}