#451 started implementing querystring support in templates (#459)

* #451 started implementing querystring support in templates

* #451 ocelot.json back to normal and specified in docs query string wont work in upstream template

* Revert "#451 ocelot.json back to normal and specified in docs query string wont work in upstream template"

This reverts commit 563193f7b2f78bad6109484fe77f3c87de831005.

* #451 ocelot.json back to normal and specified in docs query string wont work in upstream template

test/Ocelot.AcceptanceTests/RoutingWithQueryStringTests.cs

@@ -0,0 +1,104 @@
+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;
+
+namespace Ocelot.AcceptanceTests
+{
+    public class RoutingWithQueryStringTests : IDisposable
+    {
+        private IWebHost _builder;
+        private readonly Steps _steps;
+        private string _downstreamPath;
+
+        public RoutingWithQueryStringTests()
+        {
+            _steps = new Steps();
+        }
+
+        [Fact]
+        public void should_return_response_200_with_query_string_template()
+        {
+            var subscriptionId = Guid.NewGuid().ToString();
+            var unitId = Guid.NewGuid().ToString();
+
+            var configuration = new FileConfiguration
+            {
+                ReRoutes = new List<FileReRoute>
+                    {
+                        new FileReRoute
+                        {
+                            DownstreamPathTemplate = "/api/subscriptions/{subscriptionId}/updates?unitId={unitId}",
+                            DownstreamScheme = "http",
+                            DownstreamHostAndPorts = new List<FileHostAndPort>
+                            {
+                                new FileHostAndPort
+                                {
+                                    Host = "localhost",
+                                    Port = 61879,
+                                }
+                            },
+                            UpstreamPathTemplate = "/api/units/{subscriptionId}/{unitId}/updates",
+                            UpstreamHttpMethod = new List<string> { "Get" },
+                        }
+                    }
+            };
+
+            this.Given(x => x.GivenThereIsAServiceRunningOn("http://localhost:61879", $"/api/subscriptions/{subscriptionId}/updates", $"?unitId={unitId}", 200, "Hello from Laura"))
+                .And(x => _steps.GivenThereIsAConfiguration(configuration))
+                .And(x => _steps.GivenOcelotIsRunning())
+                .When(x => _steps.WhenIGetUrlOnTheApiGateway($"/api/units/{subscriptionId}/{unitId}/updates"))
+                .Then(x => _steps.ThenTheStatusCodeShouldBe(HttpStatusCode.OK))
+                .And(x => _steps.ThenTheResponseBodyShouldBe("Hello from Laura"))
+                .BDDfy();
+        }
+
+        private void GivenThereIsAServiceRunningOn(string baseUrl, string basePath, string queryString, int statusCode, string responseBody)
+        {
+            _builder = new WebHostBuilder()
+                .UseUrls(baseUrl)
+                .UseKestrel()
+                .UseContentRoot(Directory.GetCurrentDirectory())
+                .UseIISIntegration()
+                .Configure(app =>
+                {
+                    app.UsePathBase(basePath);
+                    app.Run(async context =>
+                    {   
+
+                        if(context.Request.PathBase.Value != basePath || context.Request.QueryString.Value != queryString)
+                        {
+                            context.Response.StatusCode = 404;
+                            await context.Response.WriteAsync("downstream path didnt match base path");
+                        }
+                        else
+                        {
+                            context.Response.StatusCode = statusCode;
+                            await context.Response.WriteAsync(responseBody);
+                        }
+                    });
+                })
+                .Build();
+
+            _builder.Start();
+        }
+
+        internal void ThenTheDownstreamUrlPathShouldBe(string expectedDownstreamPath)
+        {
+            _downstreamPath.ShouldBe(expectedDownstreamPath);
+        }
+
+        public void Dispose()
+        {
+            _builder?.Dispose();
+            _steps.Dispose();
+        }
+    }
+}