Enable Redis and add acceptance tests

Author: samcrang

config/service-brokers/compose/catalog.json

@@ -30,7 +30,38 @@
         "databaseType": "mongodb"
       }
     }]
-  },{
+  }, {
+    "id": "1356eeeb-7c5d-4d9d-9a04-c035a2c709b3",
+    "name": "redis",
+    "bindable": true,
+    "description": "Redis instance",
+    "requires": [],
+    "tags": [
+      "redis",
+      "compose"
+    ],
+    "metadata": {
+      "displayName": "Redis",
+      "imageUrl": "https://redis.io/images/redis-logo.svg",
+      "longDescription": "Redis instance",
+      "providerDisplayName": "GOV.UK PaaS",
+      "documentationUrl": "https://compose.com/databases/redis",
+      "supportUrl": "https://www.cloud.service.gov.uk/support.html"
+    },
+    "plans": [{
+      "id": "a8574a4b-9c6c-40ea-a0df-e9b7507948c8",
+      "name": "tiny",
+      "description": "256MB Storage / 256MB RAM",
+      "compose": {
+        "units": 1,
+        "databaseType": "redis"
+      },
+      "metadata": {
+        "displayName": "Redis Tiny",
+        "bullets": []
+      }
+    }]
+  }, {
     "id": "6e9202f2-c2e1-4de8-8d4a-a8c898fc2d8c",
     "name": "elasticsearch",
     "bindable": true,

platform-tests/example-apps/healthcheck/Gopkg.lock

@@ -18,6 +18,7 @@ func main() {
 	http.HandleFunc("/db", dbHandler)
 	http.HandleFunc("/mongo-test", mongoHandler)
 	http.HandleFunc("/elasticsearch-test", elasticsearchHandler)
+	http.HandleFunc("/redis-test", redisHandler)
 	err := http.ListenAndServe(addr, nil)
 	if err != nil {
 		log.Fatal(err)

platform-tests/example-apps/healthcheck/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/garyburd/redigo/redis"
+	"github.com/pkg/errors"
+)
+
+func redisHandler(w http.ResponseWriter, r *http.Request) {
+	err := testRedisConnection()
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	writeJson(w, map[string]interface{}{
+		"success": true,
+	})
+}
+
+func testRedisConnection() error {
+	var credentials struct {
+		URI string `json:"uri"`
+	}
+
+	err := getVCAPServiceCredentials("redis", &credentials)
+	if err != nil {
+		return errors.Wrap(err, "failed to parse VCAP_SERVICES")
+	}
+
+	conn, err := redis.DialURL(credentials.URI)
+	if err != nil {
+		return errors.Wrap(err, "failed to connect to Redis")
+	}
+	defer conn.Close()
+
+	_, err = conn.Do("SET", "hello", "world")
+	if err != nil {
+		return errors.Wrap(err, "failed to SET")
+	}
+
+	redisValue, err := redis.String(conn.Do("GET", "hello"))
+	if err != nil {
+		return errors.Wrap(err, "failed to GET")
+	}
+	if redisValue != "world" {
+		return fmt.Errorf("expected \"world\" got %s", redisValue)
+	}
+
+	return nil
+}