如何使用 FakeItEasy 在 WebApi 控制器上执行集成测试？

Question

我不熟悉实施单元测试和集成测试。我正在尝试为我的应用程序编写一些集成测试。以下是我的应用程序中的代码片段，让您了解我的代码。如果您能为我提供一些指导，那将是很大的帮助。

namespace MyApplication.ApiControllers
{
    [Authorize]
    [RoutePrefix("api/customers")]
    [AppExceptionFilter]
    public class CustomersController : ApiController
    {
        private readonly IMediator _mediator;

        public CustomersController(IMediator mediator)
        {
           _mediator = mediator;
        }

        [HttpGet]
        [Route("GetCustomer")]
        public async Task<IHttpActionResult> GetCustomer(string customerNumber, string customerType = null)
        {
            var result = await _mediator.RequestAsync(new GetCustomerRequest(customerNumber, customerType));
            return Ok(result);
        }
    }
}

以下是 GetCustomerRequest 处理程序的实现

public async Task<List<Customer>> HandleAsync(GetCustomerRequest request)
{
    var result = await customerService.GetCustomer(request.CustomerNumber, request.CustomerType);
    // some business logic 
    return result;
}

以下是 customerService 的实现

public async Task<List<Customer>> GetCustomer(string customerNumber, string customerType = null)
{

    using (var dataContext = _dataContextFactory.Invoke())
    {
        result = await dataContext.Customers
            .Where(b => b.CustomerNumber == customerNumber)
            .Where(b => b.CustomerType == customerType)
            .Select(b => new Customer
            {
                // Properties assignment...
            })
            .ToListAsync();
    }

    return result;
}

下面是我试过的集成单元测试。

namespace MyApplication.Tests.Integrations
{
    [TestFixture]
    public class CustomersControllerTests
    {
        private string _baseAddress;
        private string _username;
        private string _password;
        private IApiClient _apiClient;

        [SetUp]
        public void Setup()
        {
            _baseAddress = "https://mywebaaplication.com"; // TODO get this from a config
            _username = "";
            _password = "";
            _apiClient = new ApiClient(new ApiClientAuthenticationHandler(), _baseAddress);  // REPLACE with AzureADApiClientAuthenticationHandler
        }

        [Test]
        public async Task CustomersController_GetCustomer()
        {
            var customerNumber = string.Empty;
            var customerType = 500;
            var result = await _apiClient.GetAsync<Customer[]>($"/api/customers/GetCustomer?customerNumber={customerNumber}&customerType={customerType}");
            Assert.IsNotNull(result);
            Assert.IsTrue(result?.Length > 0);
        }
    }
}

Answer 1

您可以做几件事：

在您的单元测试中创建一个虚拟主机，然后对其执行 http 请求
不是在单元测试中测试您的控制器，而是在 liveness/readiness 检查中（因为它只是粘合代码）。只需为您的服务进行集成测试。
只需针对 "new CustomersController"

此处没有 right/wrong 答案。您只需查看风险，并进行相应的测试。还取决于您期望的代码更改类型。有时只在新变化的上下文中创建测试就很好，不需要预测一切。

如何使用 FakeItEasy 在 WebApi 控制器上执行集成测试？

How do I perform integration test on WebApi controller using FakeItEasy?

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asp.net-web-api