Added some basic cache stuff

test/Ocelot.UnitTests/Cache/OutputCacheMiddlewareTests.cs

@@ -0,0 +1,139 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net.Http;
+using CacheManager.Core;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.DependencyInjection;
+using Moq;
+using Ocelot.Cache;
+using Ocelot.Cache.Middleware;
+using Ocelot.Configuration;
+using Ocelot.Configuration.Builder;
+using Ocelot.DownstreamRouteFinder;
+using Ocelot.DownstreamRouteFinder.UrlMatcher;
+using Ocelot.Infrastructure.RequestData;
+using Ocelot.Responses;
+using TestStack.BDDfy;
+using Xunit;
+
+namespace Ocelot.UnitTests.Cache
+{
+    public class OutputCacheMiddlewareTests
+    {
+        private readonly Mock<IOcelotCache<HttpResponseMessage>> _cacheManager;
+        private readonly Mock<IRequestScopedDataRepository> _scopedRepo;
+
+        private readonly string _url;
+        private readonly TestServer _server;
+        private readonly HttpClient _client;
+        private HttpResponseMessage _result;
+        private HttpResponseMessage _response;
+
+        public OutputCacheMiddlewareTests()
+        {
+            _cacheManager = new Mock<IOcelotCache<HttpResponseMessage>>();
+            _scopedRepo = new Mock<IRequestScopedDataRepository>();
+            _url = "http://localhost:51879";
+            var builder = new WebHostBuilder()
+                .ConfigureServices(x =>
+                {
+                    x.AddLogging();
+                    x.AddSingleton(_cacheManager.Object);
+                    x.AddSingleton(_scopedRepo.Object);
+                })
+                .UseUrls(_url)
+                .UseKestrel()
+                .UseContentRoot(Directory.GetCurrentDirectory())
+                .UseIISIntegration()
+                .UseUrls(_url)
+                .Configure(app =>
+                {
+                    app.UseOutputCacheMiddleware();
+                });
+
+            _server = new TestServer(builder);
+            _client = _server.CreateClient();
+        }
+
+        [Fact]
+        public void should_returned_cached_item_when_it_is_in_cache()
+        {
+            this.Given(x => x.GivenThereIsACachedResponse(new HttpResponseMessage()))
+                .And(x => x.GivenTheDownstreamRouteIs())
+                .And(x => x.GivenThereIsADownstreamUrl())
+                .When(x => x.WhenICallTheMiddleware())
+                .Then(x => x.ThenTheCacheGetIsCalledCorrectly())
+                .BDDfy();
+        }
+
+        [Fact]
+        public void should_continue_with_pipeline_and_cache_response()
+        {
+            this.Given(x => x.GivenResponseIsNotCached())
+                .And(x => x.GivenTheDownstreamRouteIs())
+                .And(x => x.GivenThereAreNoErrors())
+                .And(x => x.GivenThereIsADownstreamUrl())
+                .When(x => x.WhenICallTheMiddleware())
+                .Then(x => x.ThenTheCacheAddIsCalledCorrectly())
+                .BDDfy();
+        }
+
+        private void GivenTheDownstreamRouteIs()
+        {
+            var reRoute = new ReRouteBuilder().WithIsCached(true).WithCacheOptions(new CacheOptions(100)).Build();
+            var downstreamRoute = new DownstreamRoute(new List<UrlPathPlaceholderNameAndValue>(), reRoute);
+
+            _scopedRepo
+                .Setup(x => x.Get<DownstreamRoute>(It.IsAny<string>()))
+                .Returns(new OkResponse<DownstreamRoute>(downstreamRoute));
+        }
+
+        private void GivenThereAreNoErrors()
+        {
+            _scopedRepo
+                .Setup(x => x.Get<bool>("OcelotMiddlewareError"))
+                .Returns(new OkResponse<bool>(false));
+        }
+
+        private void GivenThereIsADownstreamUrl()
+        {
+            _scopedRepo
+                .Setup(x => x.Get<string>("DownstreamUrl"))
+                .Returns(new OkResponse<string>("anything"));
+        }
+
+        private void ThenTheCacheGetIsCalledCorrectly()
+        {
+            _cacheManager
+                .Verify(x => x.Get(It.IsAny<string>()), Times.Once);
+        }
+
+        private void ThenTheCacheAddIsCalledCorrectly()
+        {
+            _cacheManager
+                .Verify(x => x.Add(It.IsAny<string>(), It.IsAny<HttpResponseMessage>(), It.IsAny<TimeSpan>()), Times.Once);
+        }
+
+        private void GivenResponseIsNotCached()
+        {
+            _scopedRepo
+                .Setup(x => x.Get<HttpResponseMessage>("HttpResponseMessage"))
+                .Returns(new OkResponse<HttpResponseMessage>(new HttpResponseMessage()));
+        }
+
+        private void GivenThereIsACachedResponse(HttpResponseMessage response)
+        {
+            _response = response;
+            _cacheManager
+              .Setup(x => x.Get(It.IsAny<string>()))
+              .Returns(_response);
+        }
+
+        private void WhenICallTheMiddleware()
+        {
+            _result = _client.GetAsync(_url).Result;
+        }
+    }
+}