Feature/#246 (#252)

* failing test

* failing test but needs real butterfly server running..need to fix that...also worked out ive broken tracing...yey

* brought in butterfly source code so i can work out how to write acceptance tests for this...

* fixed the bug but still need to fix tracing

* tracing working again across services but need to make tracing hook into new Ocelot middleware as it still uses asp.net middleware

* removed butterfly libs brought in for testing

docs/features/administration.rst

@@ -21,7 +21,7 @@ All you need to do to hook into your own IdentityServer is add the following to
             };
 
         services
-            .AddOcelot(Configuration)
+            .AddOcelot()
             .AddAdministration("/administration", options);
     }
 
@@ -51,7 +51,7 @@ The secret is the client secret that Ocelot's internal IdentityServer will use t
     public virtual void ConfigureServices(IServiceCollection services)
     {
         services
-            .AddOcelot(Configuration)
+            .AddOcelot()
             .AddAdministration("/administration", "secret");
     }
 

docs/features/authentication.rst

@@ -63,7 +63,7 @@ If you want to authenticate using JWT tokens maybe from a provider like Auth0 yo
                 x.Audience = "test";
             });
 
-        services.AddOcelot(Configuration);
+        services.AddOcelot();
     }
 
 Then map the authentication provider key to a ReRoute in your configuration e.g.
@@ -111,7 +111,7 @@ In order to use IdentityServer bearer tokens register your IdentityServer servic
         services.AddAuthentication()
             .AddIdentityServerAuthentication(authenticationProviderKey, options);
 
-        services.AddOcelot(Configuration);
+        services.AddOcelot();
     }
 
 Then map the authentication provider key to a ReRoute in your configuration e.g.

docs/features/configuration.rst

@@ -109,7 +109,7 @@ If you add the following when you register your services Ocelot will attempt to
 .. code-block:: csharp
 
  services
-    .AddOcelot(Configuration)
+    .AddOcelot()
     .AddStoreOcelotConfigurationInConsul();
 
 You also need to add the following to your configuration.json. This is how Ocelot

docs/features/raft.rst

@@ -12,7 +12,7 @@ In order to enable Rafty in Ocelot you must make the following changes to your S
     public virtual void ConfigureServices(IServiceCollection services)
     {
          services
-            .AddOcelot(Configuration)
+            .AddOcelot()
             .AddAdministration("/administration", "secret")
             .AddRafty();
     }

docs/features/tracing.rst

@@ -12,7 +12,7 @@ In your ConfigureServices method
 .. code-block:: csharp
 
     services
-        .AddOcelot(Configuration)
+        .AddOcelot()
         .AddOpenTracing(option =>
         {
             //this is the url that the butterfly collector server is running on...

src/Ocelot/Configuration/Repository/ConsulFileConfigurationPoller.cs

@@ -11,11 +11,11 @@ namespace Ocelot.Configuration.Repository
 {
     public class ConsulFileConfigurationPoller : IDisposable
     {
-        private IOcelotLogger _logger; 
+        private readonly IOcelotLogger _logger; 
-        private IFileConfigurationRepository _repo;
+        private readonly IFileConfigurationRepository _repo;
-        private IFileConfigurationSetter _setter;
+        private readonly IFileConfigurationSetter _setter;
         private string _previousAsJson;
-        private Timer _timer;
+        private readonly Timer _timer;
         private bool _polling;
 
         public ConsulFileConfigurationPoller(IOcelotLoggerFactory factory, IFileConfigurationRepository repo, IFileConfigurationSetter setter)

src/Ocelot/DependencyInjection/OcelotBuilder.cs

@@ -1,3 +1,4 @@
+using Butterfly.Client.Tracing;
 using Microsoft.Extensions.Options;
 using Ocelot.Middleware.Multiplexer;
 
@@ -147,9 +148,13 @@ namespace Ocelot.DependencyInjection
             //these get picked out later and added to http request
             _provider = new DelegatingHandlerHandlerProvider();
             _services.TryAddSingleton<IDelegatingHandlerHandlerProvider>(_provider);            
-            _services.AddTransient<ITracingHandler, NoTracingHandler>();
             _services.TryAddSingleton<IMultiplexer, Multiplexer>();
             _services.TryAddSingleton<IResponseAggregator, SimpleJsonResponseAggregator>();
+            _services.AddSingleton<ITracingHandlerFactory, TracingHandlerFactory>();
+
+            // We add this here so that we can always inject something into the factory for IoC..
+            _services.AddSingleton<IServiceTracer, FakeServiceTracer>();
+
         }
 
         public IOcelotAdministrationBuilder AddAdministration(string path, string secret)
@@ -192,7 +197,8 @@ namespace Ocelot.DependencyInjection
 
         public IOcelotBuilder AddOpenTracing(Action<ButterflyOptions> settings)
         {
-            _services.AddTransient<ITracingHandler, OcelotHttpTracingHandler>();
+            // Earlier we add FakeServiceTracer and need to remove it here before we add butterfly
+            _services.RemoveAll<IServiceTracer>();
             _services.AddButterfly(settings);   
             return this;
         }

src/Ocelot/Middleware/OcelotMiddlewareExtensions.cs

@@ -173,23 +173,34 @@
             var ocelotConfigurationRepository =
                 (IOcelotConfigurationRepository) builder.ApplicationServices.GetService(
                     typeof(IOcelotConfigurationRepository));
+
             var ocelotConfigurationCreator =
                 (IOcelotConfigurationCreator) builder.ApplicationServices.GetService(
                     typeof(IOcelotConfigurationCreator));
 
             var fileConfigFromConsul = await consulFileConfigRepo.Get();
+
             if (fileConfigFromConsul.Data == null)
             {
                 config = await setter.Set(fileConfig.Value);
+                var hack = builder.ApplicationServices.GetService(typeof(ConsulFileConfigurationPoller));
             }
             else
             {
                 var ocelotConfig = await ocelotConfigurationCreator.Create(fileConfigFromConsul.Data);
+
                 if(ocelotConfig.IsError)
                 {
                     return new ErrorResponse(ocelotConfig.Errors);
                 }
+
                 config = await ocelotConfigurationRepository.AddOrReplace(ocelotConfig.Data);
+
+                if (config.IsError)
+                {
+                    return new ErrorResponse(config.Errors);
+                }
+
                 //todo - this starts the poller if it has been registered...please this is so bad.
                 var hack = builder.ApplicationServices.GetService(typeof(ConsulFileConfigurationPoller));
             }

src/Ocelot/Ocelot.csproj

@@ -23,7 +23,7 @@
     <DebugSymbols>True</DebugSymbols>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Butterfly.Client.AspNetCore" Version="0.0.5" />
+     <PackageReference Include="Butterfly.Client.AspNetCore" Version="0.0.8" /> 
     <PackageReference Include="FluentValidation" Version="7.2.1" />
     <PackageReference Include="IdentityServer4.AccessTokenValidation" Version="2.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />

src/Ocelot/Requester/DelegatingHandlerHandlerProviderFactory.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Net.Http;
 using Ocelot.Configuration;
 using Ocelot.Logging;
@@ -8,17 +9,17 @@ namespace Ocelot.Requester
 {
     public class DelegatingHandlerHandlerProviderFactory : IDelegatingHandlerHandlerProviderFactory
     {
-        private readonly ITracingHandler _tracingHandler;
+        private readonly ITracingHandlerFactory _factory;
         private readonly IOcelotLoggerFactory _loggerFactory;
         private readonly IDelegatingHandlerHandlerProvider _allRoutesProvider;
         private readonly IQosProviderHouse _qosProviderHouse;
 
         public DelegatingHandlerHandlerProviderFactory(IOcelotLoggerFactory loggerFactory, 
             IDelegatingHandlerHandlerProvider allRoutesProvider,
-            ITracingHandler tracingHandler,
+            ITracingHandlerFactory factory,
             IQosProviderHouse qosProviderHouse)
         {
-            _tracingHandler = tracingHandler;
+            _factory = factory;
             _loggerFactory = loggerFactory;
             _allRoutesProvider = allRoutesProvider;
             _qosProviderHouse = qosProviderHouse;
@@ -37,7 +38,7 @@ namespace Ocelot.Requester
 
             if (request.HttpHandlerOptions.UseTracing)
             {
-                provider.Add(() => (DelegatingHandler)_tracingHandler);
+                provider.Add(() => (DelegatingHandler)_factory.Get());
             }
 
             if (request.IsQos)

src/Ocelot/Requester/HttpClientBuilder.cs

@@ -26,8 +26,10 @@ namespace Ocelot.Requester
         {
             var provider = _house.Get(request);
 
+            var handlers = provider.Data.Get();
+
             //todo handle error
-            provider.Data.Get()
+            handlers
                 .Select(handler => handler)
                 .Reverse()
                 .ToList()

src/Ocelot/Requester/ITracingHandlerFactory.cs

@@ -0,0 +1,7 @@
+namespace Ocelot.Requester
+{
+    public interface ITracingHandlerFactory
+    {
+        ITracingHandler Get();
+    }
+}

src/Ocelot/Requester/OcelotHttpTracingHandler.cs

@@ -12,11 +12,6 @@ namespace Ocelot.Requester
     {
     }
 
-    public class NoTracingHandler : DelegatingHandler, ITracingHandler
-    {
-        
-    }
-
     public class OcelotHttpTracingHandler : DelegatingHandler, ITracingHandler
     {
         private readonly IServiceTracer _tracer;

src/Ocelot/Requester/TracingHandlerFactory.cs

@@ -0,0 +1,32 @@
+using Butterfly.Client.Tracing;
+using Butterfly.OpenTracing;
+
+namespace Ocelot.Requester
+{
+    public class TracingHandlerFactory : ITracingHandlerFactory
+    {
+        private readonly IServiceTracer _tracer;
+
+        public TracingHandlerFactory(IServiceTracer tracer)
+        {
+            _tracer = tracer;
+        }
+
+        public ITracingHandler Get()
+        {
+            return new OcelotHttpTracingHandler(_tracer);
+        }
+    }
+
+    public class FakeServiceTracer : IServiceTracer
+    {
+        public ITracer Tracer { get; }
+        public string ServiceName { get; }
+        public string Environment { get; }
+        public string Identity { get; }
+        public ISpan Start(ISpanBuilder spanBuilder)
+        {
+            throw new System.NotImplementedException();
+        }
+    }
+}

test/Ocelot.AcceptanceTests/ButterflyTracingTests.cs

@@ -0,0 +1,225 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using Ocelot.Configuration.File;
+using Shouldly;
+using TestStack.BDDfy;
+using Xunit;
+using Butterfly.Client.AspNetCore;
+using static Rafty.Infrastructure.Wait;
+
+namespace Ocelot.AcceptanceTests
+{
+    public class ButterflyTracingTests : IDisposable
+    {
+        private IWebHost _serviceOneBuilder;
+        private IWebHost _serviceTwoBuilder;
+        private IWebHost _fakeButterfly;
+        private readonly Steps _steps;
+        private string _downstreamPathOne;
+        private string _downstreamPathTwo;
+        private int _butterflyCalled;
+
+        public ButterflyTracingTests()
+        {
+            _steps = new Steps();
+        }
+
+        [Fact]
+        public void should_forward_tracing_information_from_ocelot_and_downstream_services()
+        {
+            var configuration = new FileConfiguration
+            {
+                ReRoutes = new List<FileReRoute>
+                    {
+                        new FileReRoute
+                        {
+                            DownstreamPathTemplate = "/api/values",
+                            DownstreamScheme = "http",
+                            DownstreamHostAndPorts = new List<FileHostAndPort>
+                            {
+                                new FileHostAndPort
+                                {
+                                    Host = "localhost",
+                                    Port = 51887,
+                                }
+                            },
+                            UpstreamPathTemplate = "/api001/values",
+                            UpstreamHttpMethod = new List<string> { "Get" },
+                            HttpHandlerOptions = new FileHttpHandlerOptions
+                            {
+                                UseTracing  = true
+                            },
+                            QoSOptions = new FileQoSOptions
+                            {
+                                ExceptionsAllowedBeforeBreaking = 3,
+                                DurationOfBreak = 10,
+                                TimeoutValue = 5000
+                            }
+                        },
+                        new FileReRoute
+                        {
+                            DownstreamPathTemplate = "/api/values",
+                            DownstreamScheme = "http",
+                            DownstreamHostAndPorts = new List<FileHostAndPort>
+                            {
+                                new FileHostAndPort
+                                {
+                                    Host = "localhost",
+                                    Port = 51888,
+                                }
+                            },
+                            UpstreamPathTemplate = "/api002/values",
+                            UpstreamHttpMethod = new List<string> { "Get" },
+                            HttpHandlerOptions = new FileHttpHandlerOptions
+                            {
+                                UseTracing  = true
+                            },
+                            QoSOptions = new FileQoSOptions
+                            {
+                                ExceptionsAllowedBeforeBreaking = 3,
+                                DurationOfBreak = 10,
+                                TimeoutValue = 5000
+                            }
+                        }
+                    }
+            };
+
+            var butterflyUrl = "http://localhost:9618";
+
+            this.Given(x => GivenServiceOneIsRunning("http://localhost:51887", "/api/values", 200, "Hello from Laura", butterflyUrl))
+                .And(x => GivenServiceTwoIsRunning("http://localhost:51888", "/api/values", 200, "Hello from Tom", butterflyUrl))
+                .And(x => GivenFakeButterfly(butterflyUrl))
+                .And(x => _steps.GivenThereIsAConfiguration(configuration))
+                .And(x => _steps.GivenOcelotIsRunningUsingButterfly(butterflyUrl))
+                .When(x => _steps.WhenIGetUrlOnTheApiGateway("/api001/values"))
+                .Then(x => _steps.ThenTheStatusCodeShouldBe(HttpStatusCode.OK))
+                .And(x => _steps.ThenTheResponseBodyShouldBe("Hello from Laura"))
+                 .When(x => _steps.WhenIGetUrlOnTheApiGateway("/api002/values"))
+                 .Then(x => _steps.ThenTheStatusCodeShouldBe(HttpStatusCode.OK))
+                 .And(x => _steps.ThenTheResponseBodyShouldBe("Hello from Tom"))
+                .BDDfy();
+
+
+            var commandOnAllStateMachines = WaitFor(5000).Until(() => _butterflyCalled == 4);
+
+            commandOnAllStateMachines.ShouldBeTrue();
+        }
+
+        private void GivenServiceOneIsRunning(string baseUrl, string basePath, int statusCode, string responseBody, string butterflyUrl)
+        {
+            _serviceOneBuilder = new WebHostBuilder()
+                .UseUrls(baseUrl)
+                .UseKestrel()
+                .UseContentRoot(Directory.GetCurrentDirectory())
+                .UseIISIntegration()
+                .ConfigureServices(services => {
+                    services.AddButterfly(option =>
+                    {
+                        option.CollectorUrl = butterflyUrl;
+                        option.Service = "Service One";
+                        option.IgnoredRoutesRegexPatterns = new string[0];
+                    });
+                })
+                .Configure(app =>
+                {
+                    app.UsePathBase(basePath);
+                    app.Run(async context =>
+                    {   
+                        _downstreamPathOne = !string.IsNullOrEmpty(context.Request.PathBase.Value) ? context.Request.PathBase.Value : context.Request.Path.Value;
+
+                        if(_downstreamPathOne != basePath)
+                        {
+                            context.Response.StatusCode = statusCode;
+                            await context.Response.WriteAsync("downstream path didnt match base path");
+                        }
+                        else
+                        {
+                            context.Response.StatusCode = statusCode;
+                            await context.Response.WriteAsync(responseBody);
+                        }
+                    });
+                })
+                .Build();
+
+            _serviceOneBuilder.Start();
+        }
+
+        private void GivenFakeButterfly(string baseUrl)
+        {
+            _fakeButterfly = new WebHostBuilder()
+                .UseUrls(baseUrl)
+                .UseKestrel()
+                .UseContentRoot(Directory.GetCurrentDirectory())
+                .UseIISIntegration()
+                .Configure(app =>
+                {
+                    app.Run(async context =>
+                    {
+                        _butterflyCalled++;
+                        await context.Response.WriteAsync("OK...");
+                    });
+                })
+                .Build();
+
+            _fakeButterfly.Start();
+        }
+
+        private void GivenServiceTwoIsRunning(string baseUrl, string basePath, int statusCode, string responseBody, string butterflyUrl)
+        {
+            _serviceTwoBuilder = new WebHostBuilder()
+                .UseUrls(baseUrl)
+                .UseKestrel()
+                .UseContentRoot(Directory.GetCurrentDirectory())
+                .UseIISIntegration()
+                .ConfigureServices(services => {
+                    services.AddButterfly(option =>
+                    {
+                        option.CollectorUrl = butterflyUrl;
+                        option.Service = "Service Two";
+                        option.IgnoredRoutesRegexPatterns = new string[0];
+                    });
+                })
+                .Configure(app =>
+                {
+                    app.UsePathBase(basePath);
+                    app.Run(async context =>
+                    {   
+                        _downstreamPathTwo = !string.IsNullOrEmpty(context.Request.PathBase.Value) ? context.Request.PathBase.Value : context.Request.Path.Value;
+
+                        if(_downstreamPathTwo != basePath)
+                        {
+                            context.Response.StatusCode = statusCode;
+                            await context.Response.WriteAsync("downstream path didnt match base path");
+                        }
+                        else
+                        {
+                            context.Response.StatusCode = statusCode;
+                            await context.Response.WriteAsync(responseBody);
+                        }
+                    });
+                })
+                .Build();
+
+            _serviceTwoBuilder.Start();
+        }
+
+        internal void ThenTheDownstreamUrlPathShouldBe(string expectedDownstreamPathOne, string expectedDownstreamPath)
+        {
+            _downstreamPathOne.ShouldBe(expectedDownstreamPathOne);
+            _downstreamPathTwo.ShouldBe(expectedDownstreamPath);
+        }
+
+        public void Dispose()
+        {
+            _serviceOneBuilder?.Dispose();
+            _serviceTwoBuilder?.Dispose();
+            _fakeButterfly?.Dispose();
+            _steps.Dispose();
+        }
+    }
+}

test/Ocelot.AcceptanceTests/ConfigurationInConsulTests.cs

@@ -4,13 +4,10 @@ using System.Diagnostics;
 using System.IO;
 using System.Net;
 using System.Text;
-using System.Threading;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
 using Newtonsoft.Json;
-using Ocelot.Configuration;
-using Ocelot.Configuration.Builder;
 using Ocelot.Configuration.File;
 using TestStack.BDDfy;
 using Xunit;
@@ -275,7 +272,11 @@ namespace Ocelot.AcceptanceTests
 
         private void GivenIWaitForTheConfigToReplicateToOcelot()
         {
-            Thread.Sleep(10000);
+            var stopWatch = Stopwatch.StartNew();
+            while (stopWatch.ElapsedMilliseconds < 10000)
+            {
+                //do nothing!
+            }
         }
 
         private void GivenTheConsulConfigurationIs(FileConfiguration config)

test/Ocelot.AcceptanceTests/Ocelot.AcceptanceTests.csproj

@@ -1,5 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
-
   <PropertyGroup>
     <VersionPrefix>0.0.0-dev</VersionPrefix>
     <TargetFramework>netcoreapp2.0</TargetFramework>
@@ -13,22 +12,18 @@
     <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
     <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
   </PropertyGroup>
-
   <ItemGroup>
     <None Update="configuration.json;appsettings.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\..\src\Ocelot\Ocelot.csproj" />
     <ProjectReference Include="..\Ocelot.ManualTest\Ocelot.ManualTest.csproj" />
   </ItemGroup>
-
   <ItemGroup>
     <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
-</ItemGroup>
+  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="CacheManager.Serialization.Json" Version="1.1.1" />
     <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
@@ -48,6 +43,6 @@
     <PackageReference Include="TestStack.BDDfy" Version="4.3.2" />
     <PackageReference Include="Consul" Version="0.7.2.3" />
     <PackageReference Include="xunit" Version="2.3.1" />
+     <PackageReference Include="Butterfly.Client.AspNetCore" Version="0.0.8" /> 
   </ItemGroup>
-
 </Project>

test/Ocelot.AcceptanceTests/Steps.cs

@@ -26,6 +26,8 @@ using Ocelot.ServiceDiscovery;
 using Shouldly;
 using ConfigurationBuilder = Microsoft.Extensions.Configuration.ConfigurationBuilder;
 using Ocelot.AcceptanceTests.Caching;
+using Butterfly.Client.AspNetCore;
+using Butterfly.Client.Tracing;
 
 namespace Ocelot.AcceptanceTests
 {
@@ -105,6 +107,49 @@ namespace Ocelot.AcceptanceTests
             _ocelotClient = _ocelotServer.CreateClient();
         }
 
+        internal void GivenOcelotIsRunningUsingButterfly(string butterflyUrl)
+        {
+            _webHostBuilder = new WebHostBuilder();
+
+            _webHostBuilder
+                .ConfigureAppConfiguration((hostingContext, config) =>
+                {
+                    config.SetBasePath(hostingContext.HostingEnvironment.ContentRootPath);
+                    var env = hostingContext.HostingEnvironment;
+                    config.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
+                        .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true);
+                    config.AddJsonFile("configuration.json");
+                    config.AddEnvironmentVariables();
+                })
+                .ConfigureServices(s =>
+                {
+                    s.AddOcelot()
+                    .AddOpenTracing(option =>
+                    {
+                        //this is the url that the butterfly collector server is running on...
+                        option.CollectorUrl = butterflyUrl;
+                        option.Service = "Ocelot";
+                    });
+                })
+                .Configure(app =>
+                {
+                    app.Use(async (context, next) =>
+                    {
+                        await next.Invoke();
+                    });
+                    app.UseOcelot().Wait();
+                });
+
+            _ocelotServer = new TestServer(_webHostBuilder);
+
+            _ocelotClient = _ocelotServer.CreateClient();
+        }
+/*
+        public void GivenIHaveAddedXForwardedForHeader(string value)
+        {
+            _ocelotClient.DefaultRequestHeaders.TryAddWithoutValidation("X-Forwarded-For", value);
+        }*/
+
         public void GivenOcelotIsRunningWithMiddleareBeforePipeline<T>(Func<object, Task> callback)
         {
             _webHostBuilder = new WebHostBuilder();

test/Ocelot.ManualTest/Program.cs

@@ -25,7 +25,6 @@ namespace Ocelot.ManualTest
                         .AddEnvironmentVariables();
                 })
                 .ConfigureServices(s => {
-
                      s.AddAuthentication()
                         .AddJwtBearer("TestKey", x =>
                         {

test/Ocelot.ManualTest/configuration.json

@@ -8,13 +8,13 @@
       "DownstreamHostAndPorts": [
         {
           "Host": "localhost",
-          "Port": 5001
+          "Port": 5007
         }
       ],
       "HttpHandlerOptions": {
         "AllowAutoRedirect": true,
         "UseCookieContainer": true,
-        "UseTracing": false
+        "UseTracing": true
       }
     },
     {

test/Ocelot.UnitTests/Ocelot.UnitTests.csproj

@@ -50,6 +50,7 @@
     <PackageReference Include="Shouldly" Version="3.0.0-beta0003" />
     <PackageReference Include="TestStack.BDDfy" Version="4.3.2" />
     <PackageReference Include="xunit" Version="2.3.1" />
+    <PackageReference Include="Butterfly.Client.AspNetCore" Version="0.0.8" />
   </ItemGroup>
 
 </Project>

test/Ocelot.UnitTests/Requester/DelegatingHandlerHandlerProviderFactoryTests.cs

@@ -23,13 +23,15 @@ namespace Ocelot.UnitTests.Requester
         private Response<IDelegatingHandlerHandlerProvider> _provider;
         private readonly Mock<IDelegatingHandlerHandlerProvider> _allRoutesProvider;
         private readonly Mock<IQosProviderHouse> _qosProviderHouse;
+        private readonly Mock<ITracingHandlerFactory> _tracingFactory;
 
         public DelegatingHandlerHandlerProviderFactoryTests()
         {
+            _tracingFactory = new Mock<ITracingHandlerFactory>();
             _qosProviderHouse = new Mock<IQosProviderHouse>();
             _allRoutesProvider = new Mock<IDelegatingHandlerHandlerProvider>();
             _loggerFactory = new Mock<IOcelotLoggerFactory>();
-            _factory = new DelegatingHandlerHandlerProviderFactory(_loggerFactory.Object, _allRoutesProvider.Object, null, _qosProviderHouse.Object);
+            _factory = new DelegatingHandlerHandlerProviderFactory(_loggerFactory.Object, _allRoutesProvider.Object, _tracingFactory.Object, _qosProviderHouse.Object);
         }
 
         private void GivenTheQosProviderHouseReturns(Response<IQoSProvider> qosProvider)

test/Ocelot.UnitTests/Requester/TracingHandlerFactoryTests.cs

@@ -0,0 +1,27 @@
+using Butterfly.Client.Tracing;
+using Moq;
+using Ocelot.Requester;
+using Shouldly;
+using Xunit;
+
+namespace Ocelot.UnitTests.Requester
+{
+    public class TracingHandlerFactoryTests
+    {
+        private TracingHandlerFactory _factory;
+        private Mock<IServiceTracer> _tracer;
+
+        public TracingHandlerFactoryTests()
+        {
+            _tracer = new Mock<IServiceTracer>();
+            _factory = new TracingHandlerFactory(_tracer.Object);
+        }
+
+        [Fact]
+        public void should_return()
+        {
+            var handler = _factory.Get();
+            handler.ShouldBeOfType<OcelotHttpTracingHandler>();
+        }
+    }
+}