使用实体框架进行单元测试的单元测试

Question

I am attempting to unit test a PUT Request by checking values. However, I run into one simple issue. I have a test context like such:

class TestAppContext : ContextInterface
{

        public DbSet<User> Users {get; set;}
        public DbSet<Request> Requests { get; set; }

        public TestAppContext()
        {
            this.Users = new TestUsersDbSet();
            this.Requests = new TestRequestsDbSet();
        }

        public int SaveChanges(){
            return 0;
        }
        public void MarkAsModified(Object item) {

        }

        public void Dispose() { }     
}

When running a PUT with a DbContext the Entry(item).State is set to EntityState.Modified in the MarkAsModified method, then changes the changes are saved. How do I emulate this in my test context so that the DbSet reflects the changes from the PUT request?

I've gotten as far as doing this:

public void MarkAsModified(Object item) {
  if (item.GetType() == typeof(User))
  {

  }
  else if (item.GetType() == typeof(Request))
  {

  }
}

So that I can determine what is being modified, but how do I actually save the changes into the DbSet for that record?

Both records are identified on a variable id which is an int .

Answer 1

In your test context just keep a List<Object> markedAsModified field, then in the call to MarkAsModified add the object to that list if it doesn't already exist. Then in your test you can have Assert statements the check the contents of that list to make sure the right objects were passed to that function..