TDD - 我應該在我的域模型中測試數據庫約束嗎？

我應該在我的域對象中測試數據庫約束嗎？例如。如果數據庫中的字段是varchar（500）並且是必需的，我應該在代碼中對此進行測試嗎？或者我應該只依靠一個try/catch。TDD - 我應該在我的域模型中測試數據庫約束嗎？

這是一個相當大的工作開銷 - 如果可以避免的話。有例外的規則打交道時

即

//partial method for a class generated by the Entity framework 
[MetadataType(typeof(UserMetaData))] 
public partial class User 
{ 

} 

public class UserMetaData 
{ 
    [Required] 
    [StringLength(500)] 
    public string FirstName { get; set; } 
} 

// My domain object tests 
// This test in particular will throw an expected exception, saying that the first name cannot be found 
[TestFixture] 
public class UserTest 
{ 
    [Test] 
    [ExpectedException(typeof(ValidationException), ExpectedMessage = "The FirstName field is required.")] 
    public void user_should_require_first_name() 
    { 
     User user = new User(); 
     user.Id = 0; 
     user.MiddleName = "x"; 
     user.IsAdmin = true; 
     user.LastName = "James"; 
     user.Password = "password"; 
     user.Title = "Mr"; 
     user.Username = "jamesbrown"; 
     user.Email = "[email protected]"; 

     TestsHelper.ValidateObject(user); 
    } 
}

來源

2011-03-09 Sebastian Patten