.NET Core 3.0，Xunit集成测试中的DirectoryNotFoundException问题

Question

我在将我的Xunit集成测试迁移到.NET Core 3.0时遇到了新问题。我将项目移动到子文件夹中，现在出现了DirectoryNotFoundException异常。

TestServerFixture：

public class TestServerFixture : WebApplicationFactory<TestStartup>
{
    public HttpClient Client { get; }
    public ITestOutputHelper Output { get; set; }

    protected override IHostBuilder CreateHostBuilder()
    {
        var builder = Host.CreateDefaultBuilder()
            .ConfigureLogging(logging =>
            {
                logging.ClearProviders();
                logging.AddXunit(Output);
            })
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder
                    .UseStartup<TestStartup>()
                    .ConfigureTestServices((services) =>
                    {
                        services
                            .AddControllers()
                            .AddApplicationPart(typeof(Startup).Assembly);
                    });
            });

        return builder;
    }

    public TestServerFixture SetOutPut(ITestOutputHelper output)
    {
        Output = output;
        return this;
    }

    protected override void Dispose(bool disposing)
    {
        base.Dispose(disposing);
        Output = null;
    }
}

错误信息：

消息： System.IO.DirectoryNotFoundException : **C:\Users\Me\source\repos\tests\TestingWithDotNetCore3_0\MyIntegrationTests** 堆栈跟踪: PhysicalFileProvider.ctor(String root, ExclusionFilters filters) PhysicalFileProvider.ctor(String root) HostBuilder.CreateHostingEnvironment() HostBuilder.Build() WebApplicationFactory1.CreateHost(IHostBuilder builder) WebApplicationFactory1.EnsureServer() WebApplicationFactory1.CreateDefaultClient(DelegatingHandler[] handlers) WebApplicationFactory1.CreateDefaultClient(Uri baseAddress, DelegatingHandler[] handlers) WebApplicationFactory1.CreateClient(WebApplicationFactoryClientOptions options) WebApplicationFactory1.CreateClient() WeatherForecastController_Tests.ctor(TestServerFixture testServerFixture, ITestOutputHelper output) line 25

该项目不在：

*C:\Users\Me\source\repos\tests\TestingWithDotNetCore3_0\MyIntegrationTests*

在 TestServerFixture.CreateHostBuilder 方法中，Directory.GetCurrentDirectory() 返回的值为：

"C:\Users\Me\source\repos\tests\TestingWithDotNetCore3_0\src\tests\AllInOne.Integration.Tests\bin\Debug\netcoreapp3.0"

我尝试过：

    protected override IHostBuilder CreateHostBuilder()
    {
        var builder = Host.CreateDefaultBuilder()
            **.UseContentRoot(Directory.GetCurrentDirectory())**
            .ConfigureLogging(logging =>
            {
                logging.ClearProviders();
                logging.AddXunit(Output);
            })
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder
                    .UseStartup<TestStartup>()
                    **.UseContentRoot(Directory.GetCurrentDirectory())**
                    .ConfigureTestServices((services) =>
                    {
                        services
                            .AddControllers()
                            .AddApplicationPart(typeof(Startup).Assembly);
                    });
            });

        return builder;
    }

但它不起作用。

我创建了一个repo来展示这个问题：https://github.com/ranouf/TestingWithDotNetCore3_0

您有没有任何建议来正确配置它？

- Cedric Arnould

Answer 1

我通过将以下内容添加到我的Fixture中来解决了这个问题。如果你在CreateHostBuilder()中添加了UseContentRoot(Directory.GetCurrentDirectory())，它将不起作用。浪费了一个小时去追寻幽灵。 真是荒谬。

    protected override IHost CreateHost(IHostBuilder builder)
    {
        builder.UseContentRoot(Directory.GetCurrentDirectory());    
        return base.CreateHost(builder);
    }

- Theodore Zographos

Answer 2

将程序集名称固定后，问题得到解决。

- Mher Sarkissian

Answer 3

我在这里找到了一个可用的解决方案：我发现了一个对我有效的解决方案/技巧，链接在这里：https://dev59.com/G1QJ5IYBdhLWcg3wtYPq#57476187

在我的情况下，解决方案应该是：

public class TestServerFixture : WebApplicationFactory<Startup>
{
    protected override IHostBuilder CreateHostBuilder()
    {
        var builder = Host.CreateDefaultBuilder()
            .ConfigureLogging(logging =>
            {
                logging.ClearProviders();
                logging.AddXunit(Output);
            })
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder
                    .ConfigureTestServices((services) =>
                    {
                        services
                            .AddControllers()
                            .AddApplicationPart(typeof(Startup).Assembly);
                    });
            });

        return builder;
    }

    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.UseStartup<TestStartup>();    
        base.ConfigureWebHost(builder);
    }
}

- Cedric Arnould