C#。如何测试我正在尝试测试的同一类中的方法

Question

我的类 CustomerServices 中有需要模拟和测试的方法。我不确定我是否正确嘲笑？在调试中，当代码命中 customerService.Object.ProcessCustomer() 时，它不会调用实际方法。

如果这些方法是从其他类调用的，我知道如何通过在承包商中使用 DI 和引用对象来进行模拟，但我不知道如何模拟我正在尝试测试的同一类中存在的方法？

我正在使用模拟和 autoFixture

客户

public class Customer
{
    public string Name { get; set; }
    public string Address { get; set; }
}

接口

public interface ICustomerServices
{
    List<Customer> GetCustomers();
    int ProcessCustomer();
}

CustomerService

public class CustomerServices : ICustomerServices
{
    public CustomerServices()
    {

    }

    public int ProcessCustomer()
    {
        var customerList = GetCustomers();

        Console.WriteLine($"Total Customer Count {customerList.Count()}");

        return customerList.Count();
    }

    public List<Customer> GetCustomers()
    {
        return new List<Customer>();
    }
}

Test

public class Tests
{
    private readonly Mock<ICustomerServices> customerService;

    public Tests()
    {
        customerService = new Mock<ICustomerServices>();
    }

    [SetUp]
    public void Setup()
    {
    }

    [Test]
    public void Test1()
    {
        //Arrange 
        var fixture = new Fixture();

        var customerMoq = fixture.CreateMany<Customer>(5);
        customerService.Setup(_ => _.GetCustomers()).Returns((System.Collections.Generic.List<Customer>)customerMoq);

        //Act
        var actualResult = customerService.Object.ProcessCustomer();

        //Assert
    }
}

Answer 1

您不应该嘲笑正在测试的服务。

你的测试应该看起来更像这样：

[TestMethod]
public void TestGetUser()
{
    var mockLogger = new Mock<ILogger>(MockBehaviour.Strict);
    var mockSomeOtherDependency = new Mock<IA>(MockBehaviour.Strict);

    var beingTested = new UsersService(
        logger: mockLogger.Object
        someOtherDependency: mockSomeOtherDependency.Object,
        ...);

    mockSomeOtherDependency.Setup( r => r.GetCustomer("test")).Returns( new Customer(...));

    var r = beingTested.ProcessCustomer(); 

    Assert.IsNotNull(r);
}