.net核心rc2非平凡集成测试不起作用

Question

以下代码按预期工作,与asp站点上的示例非常相似:

public abstract class BaseResourceTests : IDisposable
{
    private readonly TestServer _server;

    public HttpClient HttpClient { get; }

    protected BaseResourceTests(string resourceVersion)
    {
        var hostBulider = new WebHostBuilder()
            .UseStartup<Startup>();

        _server = new TestServer(hostBulider);

        HttpClient = _server.CreateClient();
        HttpClient.BaseAddress = new Uri("http://localhost:5000");
    }

    public virtual void Dispose()
    {
        HttpClient.Dispose();
        _server.Dispose();
    }
}

public class EndpointTests : BaseResourceTests
{
    public EndpointTests()
        : base(Resource.VersionHeader)
    {
    }

    [Fact]
    public async Task Post_BodyHasValidDto_ReturnsCreated()
    {
        var dto = new Dto { Name = "someDto" };

        var response = await HttpClient.PostAsJsonAsync("/api/someEndpoint", dto);

        Check.That(response.StatusCode).IsEqualTo(HttpStatusCode.Created);
    }
}

我的测试很好,它可以很好地达到控制器中的动作.但是在现实生活中,测试稍微复杂一点,我需要添加一些服务和自定义测试配置.

为了做到这一点,我创建了一个继承自我的原始项目Startup类的TestStartup:

public class TestStartup : Startup
{
    public TestStartup(IHostingEnvironment env) : base(env)
    {
    }

    public override void ConfigureServices(IServiceCollection services)
    {
        base.ConfigureServices(services);
    }

    public override void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        base.Configure(app, env, loggerFactory);
    }
}

正如您所看到的,它只委托给基类,所以现在我更改构建器以使用我的TestStartup代码:

    protected BaseResourceTests(string resourceVersion)
    {
        var hostBulider = new WebHostBuilder()
            .UseStartup<TestStartup>();

        _server = new TestServer(hostBulider);

        HttpClient = _server.CreateClient();
        HttpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(resourceVersion));
        HttpClient.BaseAddress = new Uri("http://localhost:5000");
    }

现在,测试失败了Http NotFound异常.调试时,结果是控制器中的操作不再受测试代码的影响.

我的猜测是,如果启动文件是与控制器不同的程序集,mvc不会检测到路由,我该如何解决这个问题呢？

Answer 1

我在这里写了一篇关于使用 xUnit 进行此类集成测试的文章：http://andrewlock.net/introduction-to-integration-testing-with-xunit-and-testserver-in-asp-net-core。

我采取的方法是创建一个Fixture可以注入到测试类中的类。

夹具：

public class TestFixture<TStartup> : IDisposable where TStartup : class  
{
    private readonly TestServer _server;

    public TestFixture()
    {
        var builder = new WebHostBuilder().UseStartup<TStartup>();
        _server = new TestServer(builder);

        Client = _server.CreateClient();
        Client.BaseAddress = new Uri("http://localhost:5000");
    }

    public HttpClient Client { get; }

    public void Dispose()
    {
        Client.Dispose();
        _server.Dispose();
    }
}

然后测试类实现IClassFixture<TestFixture<TStartup>>：

public class MiddlewareIntegrationTests : IClassFixture<TestFixture<SystemUnderTest.Startup>>  
{
    public MiddlewareIntegrationTests(TestFixture<SystemUnderTest.Startup> fixture)
    {
        Client = fixture.Client;
    }

    public HttpClient Client { get; }

    [Fact]
    public async Task AllMethods_RemovesServerHeader(string method)
    {
       // Arrange
       var request = new HttpRequestMessage(new HttpMethod("GET"), "/");

       // Act
       var response = await Client.SendAsync(request);

       //assert etc
    }
}

为了使用 MVC，并确保您的视图可以被发现，您应该更新您的WebHostBuilder内容路径：

var path = PlatformServices.Default.Application.ApplicationBasePath;
var setDir = Path.GetFullPath(Path.Combine(path, <projectpathdirectory> ));

var builder = new WebHostBuilder()
    .UseContentRoot(setDir)
    .UseStartup<TStartup>();