Question

测试用例：当我编辑客户时，由于某种原因存储库无法更新，服务应返回此异常。

测试方法：

  public bool EditCustomer(CustomerViewModel customerToEdit)
    {
       return  _repository.Update(customerToEdit.ToEntity());
    }

    [TestFixtureSetUp]
    public void SetUp()
    {
        this._customerRepositoryMock = Substitute.For<ICustomerRepository>();
        this._customerService = new CustomerService(this._customerRepositoryMock);
    }



[Test]
public void EditCustomerShouldReturnTrueWhenCustomerIsCreated()
{
    var c = new CustomerViewModel();

    _customerRepositoryMock.Update(c.ToEntity()).Returns(x => {throw new Exception();});


    Assert.Throws<Exception>(() => _customerService.EditCustomer(c));
}

此测试用例将不起作用，因为customerToEdit.ToEntity（）！= c.ToEntity（）因为它们不引用同一个对象。有没有办法测试这个案例？或者我应该重写整个应用程序，并让控制器负责从实体转换到实体？

Answer 1

我不确定您使用的是哪个库，但使用Moq可以通过多种方式实现：

var viewModel = new CustomerViewModel();
var customerRepositoryMock = new Mock<ICustomerRepository>();

// If you just want to test out the behavior of an exception being thrown,
// regardless of what is passed in
customerRepositoryMock
    .Setup(r => r.Update(It.IsAny<CustomerViewModel>()))
    .Throws<Exception>();

// If you need to throw an exception when the viewmodel contains certain properties
customerRepositoryMock
    .Setup(r => r.Update(It.Is<CustomerViewModel>(c => c.Id == viewModel.Id)))
    .Throws<Exception>();

// If you need to throw an exception with specific properties, and verify those
customerRepositoryMock
    .Setup(r => r.Update(It.Is<CustomerViewModel>(c => c.Id == viewModel.Id)))
    .Throws(new Exception("some message"));

然后，您可以按照已经定义的那样执行断言。

我在这里省略了你的ToEntity()方法，因为重点是向你展示更多“宽松”的方法来确定输入参数的相等性，例如按类型或属性，而不仅仅是通过引用。

我如何测试我无法引用相同属性的案例？

1 个答案: