使用 ServiceBus 集成测试 Azure 功能

Question

我在 Azure Functions 应用程序中创建了一个Testhost class 来继承我的Startup class 的 DI。 它使我可以轻松地运行集成测试。

它看起来像这样：

public class TestHost
{
    public TestHost()
    {
        var startup = new TestStartup();
        var host = new HostBuilder()
            .ConfigureWebJobs(startup.Configure)
            .ConfigureServices(ReplaceTestOverrides)
            .Build();

        ServiceProvider = host.Services;
    }

    public IServiceProvider ServiceProvider { get; }

    private void ReplaceTestOverrides(IServiceCollection services)
    {
        services.Replace(new ServiceDescriptor(typeof(ICosmosDbService<GroupStorage>),
            new CosmosDbServiceStub<GroupStorage>()));
    }

    private class TestStartup : Viloc.ClientApi.Startup
    {
        public override void Configure(IFunctionsHostBuilder builder)
        {
            SetExecutionContextOptions(builder);
            base.Configure(builder);
        }

        private static void SetExecutionContextOptions(IFunctionsHostBuilder builder)
        {
            builder.Services.Configure<ExecutionContextOptions>(o => o.AppDirectory = Directory.GetCurrentDirectory());
        }
    }
}

在我的集成测试 class 中，我然后注入 function 本身，在像这样运行实际测试时调用。

不与我的调解员交谈的 GET 调用得到了很好的处理，但是当我需要接触服务总线时。 那是哪里出错了。

我将TestClass缩小为仅包含使用服务总线的 POST 调用。

 [Collection(TestCollection.Name)]
public class RestTest: BaseIntegrationTest
{
    //Functions
    private readonly TestFunction _testFunction;
    
    //Repositories
    private readonly IRepository _repository;
    
    //Internal dependencies
    private readonly IMapper _mapper;
    private readonly HttpContext _httpContext;

    public RestTest(TestHost testHost, DatabaseCleaner databaseCleaner): base(databaseCleaner)
    {
        _repository = testHost.ServiceProvider.GetRequiredService<IRepository>();
        _mapper = testHost.ServiceProvider.GetRequiredService<IMapper>();
        _httpContext = BaseIntegrationTest._httpContext;
        
        _testFunction = new TestFunction(new RequestValidation(), _mapper);
    }
    
    [Fact]
    public async Task POST_TestCall_ShouldReturnTrue()
    {
        var body = new class
        {
            testData = new List<Data>()
            {
                new Data()
                {
                    name = "test",
                    value = "test"
                }
            };
        };
        var stream = new MemoryStream(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(body)));
        _httpContext.Request.Body = stream;
        
        var result = await _testFunction.RunAsync(_httpContext.Request, _collector);
        
        result.Should().Be(true);
    }
}

这是一个简单的 Azure Function 示例，再次缩小以删除不必要的代码。

public class TestFunction
{
    private readonly RequestValidation _validation;
    private readonly IMapper _mapper;

    public TestFunction(RequestValidation validation, IMapper mapper)
    {
        _validation = validation;
        _mapper = mapper;
    }
    
    [FunctionName("TestFunction")]  
    [OpenApiOperation("test-call", "test", Description = "minfied function for stack")]
    [FunctionAuthorize]
    public async Task<IActionResult> RunAsync(
        [HttpTrigger(AuthorizationLevel.Function, "post", Route = "test")]
        HttpRequest req,
        [ServiceBus("test", Connection = "SERVICEBUS", EntityType = EntityType.Topic)]
        ICollector<Message> outputQueueItem)
    {
        return await HttpExtensions.HandleRequest<Testclass>(req, _validation, data =>
        {
            var request = new CreateTestCommand(_mapper.Map<TestClass>(data), Guid.Parse(req.GetClientId()));
            outputQueueItem.Add(MessageUtils.CreateMessage(request));
            return Task.FromResult<IActionResult>(new AcceptedResult());
        });   
    }
}

事情是需要传递一个ICollector<Message>的实例，我现在将其传递为null 。 如何创建注入服务总线或传递ICollector<Message>的可行方法？