我有一个客户业务实体,只能通过CustomerFactory创建。但是,我对如何对使用Customer对象的类执行单元测试有疑问,因为单元测试需要在使用客户时设置Customer及其CustomerFactory。
使用CustomerFactory而不是构造函数的原因是它需要通过ICustomerValidator进行验证。但是,将验证逻辑放在构造函数中需要将ICustomerValidator注入构造函数中,这可能是不可取的。
例如,在执行ICustomerService实现的单元测试时,必须创建设置步骤,包括创建和设置Customer和CustomerFactory(以及通过ICustomerValidator进行客户验证,例如IdValidFirstName)。此外,只要在单元测试中使用Customer实例,就必须重复这些设置。
以下是经过单元测试的ICustomerService,但必须创建以下客户的设置:
我想对此实现进行单元测试
public interface ICustomerService
{
bool AddCustomer(Customer customer);
}
public class Customer
{
internal Customer()
{ }
public int Id { get; internal set; }
public string Firstname { get; internal set; }
public string Surname { get; internal set; }
public DateTime DateOfBirth { get; internal set; }
public string EmailAddress { get; internal set; }
public bool HasCreditLimit { get; internal set; }
public Company Company { get; internal set; }
//... other properties
}
请注意,ICustomerService和ICustomerFactory的实现都取决于ICustomerValidator
public interface ICustomerFactory
{
Customer CreateCustomerWith(int id, string firstName, string surname, DateTime dateOfBirth, string emailAddress, Company company);
}
public class CustomerFactory : ICustomerFactory
{
private ICustomerValidator customerValidator;
public CustomerFactory(ICustomerValidator customerValidator)
{
this.customerValidator = customerValidator;
}
public Customer CreateCustomerWith(int id, string firstName, string surname, DateTime dateOfBirth,
string emailAddress, Company company)
{
//validation logic here ...
}
}
public interface ICustomerValidator
{
IDictionary<string, string> Errors { get; }
bool IsValid(Customer customer);
bool IsValidId(int id);
bool IsValidFirstName(string firstName);
bool IsValidSurname(string surname);
bool IsValidDateOfBirth(DateTime dateOfBirth);
bool IsValidEmailAddress(string emailAddress);
bool IsValidCompany(Company company);
}
但是我必须在执行ICustomerService的单元测试时设置它,这看起来很多设置,或者它是否正确,或者是否有更好的方法(我可以让它重复使用,但我仍然需要调用它在ICustomerService的测试中,它是唯一的方式吗?
private Customer CreatCustomer()
{
var customerId = 0;
var firstName = "John";
var surname = "Tom";
var emailAddress = "John.Tom@unit.com";
var dateOfBirth = new DateTime(2013, 1, 1);
var company = new Company(34, "Unit", Classification.VIP);
SetupForCustomerCreation(customerId,firstName,surname,emailAddress,dateOfBirth,company);
var customer = this.customerFactory
.CreateCustomerWith(
customerId, firstName, surname, dateOfBirth, emailAddress, company);
return customer;
}
private void SetupForCustomerCreation(int customerId, string firstName, string surname, string emailAddress, DateTime dateOfBirth, Company company)
{
this.customerValidatorMock.Setup(c =>
c.IsValidId(customerId)).Returns(true);
this.customerValidatorMock.Setup(c =>
c.IsValidFirstName(firstName)).Returns(true);
this.customerValidatorMock.Setup(c =>
c.IsValidSurname(surname)).Returns(true);
this.customerValidatorMock.Setup(c =>
c.IsValidDateOfBirth(dateOfBirth)).Returns(true);
this.customerValidatorMock.Setup(c =>
c.IsValidEmailAddress(emailAddress)).Returns(true);
this.customerValidatorMock.Setup(c =>
c.IsValidCompany(company)).Returns(true);
}
提前致谢!
答案 0 :(得分:1)
我建议将Customer构造函数公开。完成后,您可以自由使用它,而无需一直触摸它的工厂。通过将非公共建设者引入某个类使其隐含地依赖于其工厂,这在大多数情况下是不推荐的。最好是松散耦合的类,因为它更容易保持和测试
答案 1 :(得分:0)
虽然我强烈建议@ Alexandr-Mihalciuc回答正确的方法,但您可以将客户类定义为InternalsVisible的程序集公开给您的测试程序集,并且能够创建客户类的实例在测试中,即使你保留了你的内部人员。