Feature/test for #441 (#444)

* #441 added a test for this change

* #441 bit of tidying up and fixing of erros

src/Ocelot/DownstreamRouteFinder/Finder/DownstreamRouteCreator.cs

@@ -61,7 +61,7 @@
 
             downstreamRoute = new OkResponse<DownstreamRoute>(new DownstreamRoute(new List<PlaceholderNameAndValue>(), reRoute));
 
-            _cache.AddOrUpdate(loadBalancerKey, downstreamRoute, (x, y)  => downstreamRoute);
+            _cache.AddOrUpdate(loadBalancerKey, downstreamRoute, (x, y) => downstreamRoute);
         
             return downstreamRoute;
         }

src/Ocelot/LoadBalancer/LoadBalancers/NoLoadBalancer.cs

@@ -20,7 +20,7 @@ namespace Ocelot.LoadBalancer.LoadBalancers
         public async Task<Response<ServiceHostAndPort>> Lease(DownstreamContext downstreamContext)
         {
             var services = await _services();
-            //todo first or default could be null..
+
             if (services == null || services.Count == 0)
             {
                 return new ErrorResponse<ServiceHostAndPort>(new ServicesAreEmptyError("There were no services in NoLoadBalancer"));

src/Ocelot/Raft/SqlLiteLog.cs

@@ -99,6 +99,7 @@ namespace Ocelot.Raft
                     }
                 }
             }
+
             _sempaphore.Release();
             return result;
         }
@@ -120,6 +121,7 @@ namespace Ocelot.Raft
                     }
                 }
             }
+
             _sempaphore.Release();
             return result;
         }
@@ -135,6 +137,7 @@ namespace Ocelot.Raft
                     TypeNameHandling = TypeNameHandling.All
                 };
                 var data = JsonConvert.SerializeObject(log, jsonSerializerSettings);
+
                 //todo - sql injection dont copy this..
                 var sql = $"insert into logs (data) values ('{data}')";
                 _logger.LogInformation($"id: {_nodeId.Id}, sql: {sql}");
@@ -162,6 +165,7 @@ namespace Ocelot.Raft
             using (var connection = new SqliteConnection($"Data Source={_path};"))
             {
                 connection.Open();
+
                 //todo - sql injection dont copy this..
                 var sql = $"select data from logs where id = {index};";
                 _logger.LogInformation($"id: {_nodeId.Id} sql: {sql}");
@@ -188,6 +192,7 @@ namespace Ocelot.Raft
                     }
                 }
             }
+
             _sempaphore.Release();
         }
 
@@ -197,6 +202,7 @@ namespace Ocelot.Raft
             using (var connection = new SqliteConnection($"Data Source={_path};"))
             {
                 connection.Open();
+
                 //todo - sql injection dont copy this..
                 var sql = $"select data from logs where id = {index};";
                 using (var command = new SqliteCommand(sql, connection))
@@ -227,6 +233,7 @@ namespace Ocelot.Raft
             using (var connection = new SqliteConnection($"Data Source={_path};"))
             {
                 connection.Open();
+
                 //todo - sql injection dont copy this..
                 var sql = $"select data from logs where id = {index}";
                 using (var command = new SqliteCommand(sql, connection))
@@ -251,6 +258,7 @@ namespace Ocelot.Raft
             using (var connection = new SqliteConnection($"Data Source={_path};"))
             {
                 connection.Open();
+
                 //todo - sql injection dont copy this..
                 var sql = $"select id, data from logs where id >= {index}";
                 using (var command = new SqliteCommand(sql, connection))
@@ -267,10 +275,10 @@ namespace Ocelot.Raft
                             };
                             var log = JsonConvert.DeserializeObject<LogEntry>(data, jsonSerializerSettings);
                             logsToReturn.Add((id, log));
-
                         }
                     }
                 }
+
                 _sempaphore.Release();
                 return logsToReturn;
             }
@@ -283,6 +291,7 @@ namespace Ocelot.Raft
             using (var connection = new SqliteConnection($"Data Source={_path};"))
             {
                 connection.Open();
+
                 //todo - sql injection dont copy this..
                 var sql = $"select data from logs where id = {index}";
                 using (var command = new SqliteCommand(sql, connection))
@@ -299,15 +308,18 @@ namespace Ocelot.Raft
                     }
                 }
             }
+
             _sempaphore.Release();
             return result;
         }
+
         public async Task Remove(int indexOfCommand)
         {
             _sempaphore.Wait();
             using (var connection = new SqliteConnection($"Data Source={_path};"))
             {
                 connection.Open();
+
                 //todo - sql injection dont copy this..
                 var deleteSql = $"delete from logs where id >= {indexOfCommand};";
                 _logger.LogInformation($"id: {_nodeId.Id} Remove {deleteSql}");
@@ -316,6 +328,7 @@ namespace Ocelot.Raft
                     var result = await deleteCommand.ExecuteNonQueryAsync();
                 }
             }
+
             _sempaphore.Release();
         }
     }

src/Ocelot/Requester/IHttpClientCache.cs

@@ -1,16 +1,10 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Net.Http;
-using System.Threading.Tasks;
-
-namespace Ocelot.Requester
+namespace Ocelot.Requester
 {
+    using System;
+
     public interface IHttpClientCache
     {
-        bool Exists(string id);
         IHttpClient Get(string id);
-        void Remove(string id);
         void Set(string id, IHttpClient handler, TimeSpan expirationTime);
     }
 }

src/Ocelot/Requester/MemoryHttpClientCache.cs

@@ -1,21 +1,20 @@
-using Microsoft.Extensions.Caching.Memory;
-using System;
-using System.Collections.Concurrent;
-using System.Collections.Generic;
-using System.Linq;
-using System.Net.Http;
-using System.Threading.Tasks;
-
-namespace Ocelot.Requester
+namespace Ocelot.Requester
 {
+    using System;
+    using System.Collections.Concurrent;
+
     public class MemoryHttpClientCache : IHttpClientCache
     {
-        private readonly ConcurrentDictionary<string, ConcurrentQueue<IHttpClient>> _httpClientsCache = new ConcurrentDictionary<string, ConcurrentQueue<IHttpClient>>();
+        private readonly ConcurrentDictionary<string, ConcurrentQueue<IHttpClient>> _httpClientsCache;
+
+        public MemoryHttpClientCache()
+        {
+            _httpClientsCache = new ConcurrentDictionary<string, ConcurrentQueue<IHttpClient>>();
+        }
 
         public void Set(string id, IHttpClient client, TimeSpan expirationTime)
         {
-            ConcurrentQueue<IHttpClient> connectionQueue;
-            if (_httpClientsCache.TryGetValue(id, out connectionQueue))
+            if (_httpClientsCache.TryGetValue(id, out var connectionQueue))
             {
                 connectionQueue.Enqueue(client);
             }
@@ -27,28 +26,15 @@ namespace Ocelot.Requester
             }
         }
 
-        public bool Exists(string id)
-        {
-            ConcurrentQueue<IHttpClient> connectionQueue;
-            return _httpClientsCache.TryGetValue(id, out connectionQueue);
-        }
-
         public IHttpClient Get(string id)
         {
             IHttpClient client= null;
-            ConcurrentQueue<IHttpClient> connectionQueue;
-            if (_httpClientsCache.TryGetValue(id, out connectionQueue))
+            if (_httpClientsCache.TryGetValue(id, out var connectionQueue))
             {
                 connectionQueue.TryDequeue(out client);
             }
 
             return client;
         }      
-
-        public void Remove(string id)
-        {
-            ConcurrentQueue<IHttpClient> connectionQueue;
-            _httpClientsCache.TryRemove(id, out connectionQueue);
-        }        
     }
 }

test/Ocelot.UnitTests/Middleware/OcelotPipelineExtensionsTests.cs

@@ -45,7 +45,6 @@ namespace Ocelot.UnitTests.Middleware
             services.AddDiscoveryClient(new DiscoveryOptions 
             {
                 ClientType = DiscoveryClientType.EUREKA,
-                //options can not be null
                 ClientOptions = new EurekaClientOptions()
                 {
                     ShouldFetchRegistry = false,

test/Ocelot.UnitTests/Requester/HttpClientBuilderTests.cs

@@ -23,15 +23,18 @@ namespace Ocelot.UnitTests.Requester
 {
     public class HttpClientBuilderTests : IDisposable
     {
-        private readonly HttpClientBuilder _builder;
+        private HttpClientBuilder _builder;
         private readonly Mock<IDelegatingHandlerHandlerFactory> _factory;
         private IHttpClient _httpClient;
         private HttpResponseMessage _response;
         private DownstreamContext _context;
         private readonly Mock<IHttpClientCache> _cacheHandlers;
-        private Mock<IOcelotLogger> _logger;
+        private readonly Mock<IOcelotLogger> _logger;
         private int _count;
         private IWebHost _host;
+        private IHttpClient _againHttpClient;
+        private IHttpClient _firstHttpClient;
+        private MemoryHttpClientCache _realCache;
 
         public HttpClientBuilderTests()
         {
@@ -61,6 +64,47 @@ namespace Ocelot.UnitTests.Requester
                 .BDDfy();
         }
 
+        [Fact]
+        public void should_get_from_cache()
+        {
+            var qosOptions = new QoSOptionsBuilder()
+                .Build();
+
+            var reRoute = new DownstreamReRouteBuilder()
+                .WithQosOptions(qosOptions)
+                .WithHttpHandlerOptions(new HttpHandlerOptions(false, false, false, true))
+                .WithLoadBalancerKey("")
+                .WithQosOptions(new QoSOptionsBuilder().Build())
+                .Build();
+
+            this.Given(x => GivenARealCache())
+                .And(x => GivenTheFactoryReturns())
+                .And(x => GivenARequest(reRoute))
+                .And(x => WhenIBuildTheFirstTime())
+                .And(x => WhenISave())
+                .And(x => WhenIBuildAgain())
+                .And(x => WhenISave())
+                .When(x => WhenIBuildAgain())
+                .Then(x => ThenTheHttpClientIsFromTheCache())
+                .BDDfy();
+        }
+
+        private void GivenARealCache()
+        {
+            _realCache = new MemoryHttpClientCache();
+            _builder = new HttpClientBuilder(_factory.Object, _realCache, _logger.Object);
+        }
+
+        private void ThenTheHttpClientIsFromTheCache()
+        {
+            _againHttpClient.ShouldBe(_firstHttpClient);
+        }
+
+        private void WhenISave()
+        {
+            _builder.Save();
+        }
+
         [Fact]
         public void should_log_if_ignoring_ssl_errors()
         {
@@ -302,6 +346,17 @@ namespace Ocelot.UnitTests.Requester
             _httpClient = _builder.Create(_context);
         }
 
+        private void WhenIBuildTheFirstTime()
+        {
+            _firstHttpClient = _builder.Create(_context);
+        }
+
+        private void WhenIBuildAgain()
+        {
+            _builder = new HttpClientBuilder(_factory.Object, _realCache, _logger.Object);
+            _againHttpClient = _builder.Create(_context);
+        }
+
         private void ThenTheHttpClientShouldNotBeNull()
         {
             _httpClient.ShouldNotBeNull();

test/Ocelot.UnitTests/ServiceDiscovery/PollingConsulServiceDiscoveryProviderTests.cs

@@ -1,33 +1,24 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using Consul;
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Http;
-using Moq;
-using Ocelot.Infrastructure.Consul;
-using Ocelot.Logging;
-using Ocelot.ServiceDiscovery.Configuration;
-using Ocelot.ServiceDiscovery.Providers;
-using Ocelot.Values;
-using Xunit;
-using TestStack.BDDfy;
-using Shouldly;
-using static Ocelot.Infrastructure.Wait;
-
-namespace Ocelot.UnitTests.ServiceDiscovery
+namespace Ocelot.UnitTests.ServiceDiscovery
 {
+    using System;
+    using System.Collections.Generic;
+    using Moq;
+    using Ocelot.Logging;
+    using Ocelot.ServiceDiscovery.Providers;
+    using Ocelot.Values;
+    using Xunit;
+    using TestStack.BDDfy;
+    using Shouldly;
+    using static Ocelot.Infrastructure.Wait;
+
     public class PollingConsulServiceDiscoveryProviderTests
     {
         private readonly int _delay;
         private PollingConsulServiceDiscoveryProvider _provider;
-        private readonly string _serviceName;
-        private List<Service> _services;
+        private readonly List<Service> _services;
         private readonly Mock<IOcelotLoggerFactory> _factory;
         private readonly Mock<IOcelotLogger> _logger;
-        private Mock<IServiceDiscoveryProvider> _consulServiceDiscoveryProvider;
+        private readonly Mock<IServiceDiscoveryProvider> _consulServiceDiscoveryProvider;
         private List<Service> _result;
 
         public PollingConsulServiceDiscoveryProviderTests()
@@ -64,7 +55,7 @@ namespace Ocelot.UnitTests.ServiceDiscovery
 
         private void WhenIGetTheServices(int expected)
         {
-            _provider = new PollingConsulServiceDiscoveryProvider(_delay, _serviceName, _factory.Object, _consulServiceDiscoveryProvider.Object);
+            _provider = new PollingConsulServiceDiscoveryProvider(_delay, "", _factory.Object, _consulServiceDiscoveryProvider.Object);
 
             var result = WaitFor(3000).Until(() => {
                 try