使用私有setter测试属性

Question

目前在我的项目的一部分中存在如下的域对象:

public class Address
{
    public virtual string HouseName { get; set; }

    public virtual string HouseNumber { get; set; }

    public virtual string RoadName { get; set; }

    public virtual string Postcode { get; set; }

    public virtual string District { get; private set; }
}

District属性是数据库中的计算列.由于数据访问提供程序(实体框架)的要求,需要私有集.这在正常的程序流程中很好,因为区域永远不需要设置,因为在数据库中保存/更新地址记录时它会被更新

我想测试的方法如下所示:

public IEnumerable<House> GetHousesWithinSameDistrict (int addressId)
{
    var addressToMatch = _addressRepository
      .FirstOrDefault(address => address.Id == addressId)

    return _houseRepository
      .Where(house => house.Address.District == addressToMatch.District)
}

当我尝试设置addressToMatch变量时,这会导致我出现问题,因为我无法设置District属性,因此我无法编写测试来检查是否返回了正确的匹配地址.

我该如何设置此测试的Address对象？

Answer 1

如果您正在使用Moq(问题标记为,所以我假设您是),这可以开箱即用:

var mockAddress = new Mock<Address>();
mockAddress.SetupGet(p => p.District).Returns("Whatever you want to match");

所以一个更完整的例子是:

var mockAddress = new Mock<Address>();
mockAddress.SetupGet(p => p.Id).Returns(42);
mockAddress.SetupGet(p => p.District).Returns("What you want to match");

var mockAddressRepository = new Mock<IRepository<Address>>();
var addresses = new List<Address> { mockAddress.Object };
mockAddressRepository.Setup(p => p.GetEnumerator()).Returns(addresses.GetEnumerator());

var addressToMatch = mockAddressRepository.Object.FirstOrDefault(address => address.Id == 42);
Console.WriteLine(addressToMatch.District);

这会输出预期值:

What you want to match