[英]Unit test failing on EF Entry.State
Is it possible to unit test this? 有可能进行单元测试吗?
public class MyRepository<T> where T : IdentityUser, new()
{
public async Task UpdateAsync(T user)
{
_context.Entry(user).State = EntityState.Modified;
_context.Entry(user).Property("UserName").IsModified = false;
await _context.SaveChangesAsync();
}
}
The [TestInitialize] adds 1 user to the repository [TestInitialize]将1个用户添加到存储库
_user = new IdentityUser { Id = "70a038cdde40" };
IDbSet<IdentityUser> users = new FakeDbSet<IdentityUser> { _user };
var dbContext = new Mock<MyDbContext<IdentityUser>>();
dbContext.Setup(x => x.Users).Returns(() => users);
_repository = new MyRepository<IdentityUser>(dbContext.Object);
and I'm trying to test with this 而我正试着用这个来测试
private MyRepository<IdentityUser> _repository;
[TestMethod]
public async Task UpdateUser_Success2()
{
var user = await _repository.FindByIdAsync("70a038cdde40");
Assert.IsFalse(user.EmailConfirmed, "User.EmailConfirmed is True");
user.EmailConfirmed = true;
await _repository.UpdateAsync(user);
(...)
}
But it dies on 1st line of UpdateAsync. 但它死在UpdateAsync的第一行。 Is the test that is wrong or the UpdateAsync implementation? 测试是错误的还是UpdateAsync实现? Is there any way I can test it? 有什么方法可以测试吗?
Edit 编辑
I added as suggested by Belogix 我按照Belogix的建议添加了
dbContext.Setup(x => x.Entry(It.IsAny<IdentityUser>()))
.Returns(() => dbContext.Object.Entry(_user));
That gets me closer, I think, but still have the non-virtual error: Invalid setup on a non-virtual member: x => x.Entry(It.IsAny()) 我认为这让我更接近,但仍然存在非虚拟错误:非虚拟成员上的设置无效:x => x.Entry(It.IsAny())
Best quote ever: "All problems in computer science can be solved by another level of indirection" - Butler Lampson. 有史以来最好的报价:“计算机科学中的所有问题都可以通过另一层次的间接解决” - 巴特勒兰普森。
It looks like this can't be tested directly without adding some additional abstraction. 看起来如果不添加一些额外的抽象就无法直接测试。 I had to refactor my UpdateAsync method this way 我必须以这种方式重构我的UpdateAsync方法
public async Task UpdateAsync(T user)
{
SetEntityStateModified(user);
SetPropertyIsModified(user);
await _context.SaveChangesAsync();
}
public virtual void SetPropertyIsModified(T user)
{
_context.Entry(user).Property("UserName").IsModified = false;
}
public virtual void SetEntityStateModified(T user)
{
_context.Entry(user).State = EntityState.Modified;
}
And then update my test code in the Initialize 然后在Initialize中更新我的测试代码
_repository = new Mock<MyRepository<IdentityUser>>(dbContext.Object);
_repository.Setup(x => x.SetEntityStateModified(It.IsAny<IdentityUser>()));
_repository.Setup(x => x.SetPropertyIsModified(It.IsAny<IdentityUser>()));
My test then finally passes 我的测试终于过去了
[TestMethod]
public async Task can_update_user_details()
{
//Arrange
var user = await _repository.Object.FindByIdAsync("70a038cdde40");
Assert.IsFalse(user.EmailConfirmed, "User.EmailConfirmed is True");
//Act
user.EmailConfirmed = true;
await _repository.Object.UpdateAsync(user);
var newUser = await _repository.Object.FindByIdAsync("70a038cdde40");
//Assert
Assert.IsTrue(newUser.EmailConfirmed, "User.EmailConfirmed is False");
}
The ChangeTracker in dbContext tracks changes and hold the entities that are changed. dbContext中的ChangeTracker跟踪更改并保留更改的实体。 So you can assert the changed entity is among them. 所以你可以断言改变后的实体就在其中。
Assert.IsTrue(dbContext.Object.ChangeTracker.Entries().Any(entry =>
entry.State == EntityState.Modified &&
entry.Entity is IdentityUser &&
(entry.Entity as IdentityUser).Id == users[0].Id // Here you can check if it is actually the same user
));
For the property it would be something like this: 对于该属性,它将是这样的:
Assert.IsTrue(_context.Object.ChangeTracker.Entries().Any(entry =>
entry.Property("UserName").IsModified == false &&
entry.Entity is IdentityUser &&
(entry.Entity as IdentityUser).Id == users[0].Id // Here you can check if it is actually the same user
));
It looks like you have not stubbed your context
correctly... I am not at a computer with Visual Studio so here is some pseudo code that should demonstrate what I mean. 看起来你没有正确地描述你的context
...我不是在使用Visual Studio的计算机上所以这里有一些伪代码应该证明我的意思。 Replace the IsAnything
with either your mocking frameworks way of ignoring argument or actually the user if you want to handle different responses. 如果要处理不同的响应,请使用IsAnything
框架替换参数或实际上是用户替换IsAnything
。
// Existing context initialisation...
var dbContext = new Mock<MyDbContext<IdentityUser>>();
dbContext.Setup(x => x.Users).Returns(() => users);
// NEW: Mock what / how Entry is going to return when called (i.e. return a user)
dbContext.Setup(x => x.Entry(IsAnything)).Returns(() => users[0]);
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