Added request id functionality and general refactoring..also turned out i wasnt returning headers....sigh

test/Ocelot.UnitTests/Errors/GobalErrorHandlerTests.cs

@@ -0,0 +1,83 @@
+/*
+using System;
+using System.IO;
+using System.Net.Http;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Moq;
+using Ocelot.Middleware;
+using Ocelot.RequestId.Provider;
+using TestStack.BDDfy;
+using Xunit;
+
+namespace Ocelot.UnitTests.Errors
+{
+    public class GobalErrorHandlerTests
+    {
+        private readonly Mock<ILoggerFactory> _loggerFactory;
+        private readonly Mock<ILogger<ExceptionHandlerMiddleware>> _logger;
+        private readonly Mock<IRequestIdProvider> _requestIdProvider;
+        private readonly string _url;
+        private readonly TestServer _server;
+        private readonly HttpClient _client;
+        private HttpResponseMessage _result;
+
+        public GobalErrorHandlerTests()
+        {
+            _url = "http://localhost:51879";
+            _logger = new Mock<ILogger<ExceptionHandlerMiddleware>>();
+            _loggerFactory = new Mock<ILoggerFactory>();
+            _requestIdProvider = new Mock<IRequestIdProvider>();
+            var builder = new WebHostBuilder()
+                .ConfigureServices(x =>
+                {
+                    x.AddSingleton(_requestIdProvider.Object);
+                    x.AddSingleton(_loggerFactory.Object);
+                })
+                .UseUrls(_url)
+                .UseKestrel()
+                .UseContentRoot(Directory.GetCurrentDirectory())
+                .UseIISIntegration()
+                .UseUrls(_url)
+                .Configure(app =>
+                {
+                    app.UseExceptionHandlerMiddleware();
+
+                    app.Run(x =>
+                    {
+                        throw new Exception("BLAM");
+                    });
+                });
+
+            _loggerFactory
+                .Setup(x => x.CreateLogger<ExceptionHandlerMiddleware>())
+                .Returns(_logger.Object);
+
+            _server = new TestServer(builder);
+            _client = _server.CreateClient();
+        }
+
+        [Fact]
+        public void should_catch_exception_and_log()
+        {
+            this.When(x => x.WhenICallTheMiddleware())
+                .And(x => x.TheLoggerIsCalledCorrectly())
+                .BDDfy();
+        }
+
+        private void TheLoggerIsCalledCorrectly()
+        {
+            _logger
+                .Verify(x => x.LogError(It.IsAny<EventId>(), It.IsAny<string>(), It.IsAny<Exception>()), Times.Once);
+        }
+
+        private void WhenICallTheMiddleware()
+        {
+            _result = _client.GetAsync(_url).Result;
+        }
+    }
+}
+*/