Replace then-redis with ioredis.

Also, significantly reduce mocking in the test suite by using an
in-memory redis client.
Fixes #51
Fixes #74

Author: blimmer

lib/redis.js

@@ -6,7 +6,7 @@ module.exports = CoreObject.extend({
   init: function(options, lib) {
     this._super();
     var redisOptions = {};
-    var redisLib     = lib;
+    var RedisLib     = lib;
 
     if (options.url) {
       redisOptions = this._stripUsernameFromConfigUrl(options.url);
@@ -21,15 +21,15 @@ module.exports = CoreObject.extend({
       }
 
       if (options.database) {
-        redisOptions.database = options.database;
+        redisOptions.db = options.database;
       }
     }
 
-    if (!redisLib) {
-      redisLib = require('then-redis');
+    if (!RedisLib) {
+      RedisLib = require('ioredis');
     }
 
-    this._client = redisLib.createClient(redisOptions);
+    this._client = new RedisLib(redisOptions);
 
     this._maxRecentUploads = options.maxRecentUploads;
     this._allowOverwrite = options.allowOverwrite;
@@ -204,13 +204,16 @@ module.exports = CoreObject.extend({
       if (!revisions) {
         return;
       }
+      var promises = [];
       revisions.forEach(function(revision) {
         if (revision !== current) {
-          client.del(keyPrefix + ":" + revision);
-          client.del(keyPrefix + ":revision-data:" + revision);
-          client.zrem(listKey, revision);
+          promises.push(client.del(keyPrefix + ":" + revision));
+          promises.push(client.del(keyPrefix + ":revision-data:" + revision));
+          promises.push(client.zrem(listKey, revision));
         }
       });
+
+      return RSVP.all(promises);
     });
   },
 

package.json

@@ -23,8 +23,10 @@
     "eslint": "^3.18.0",
     "github": "^6.1.0",
     "glob": "^7.1.1",
+    "ioredis-mock": "^3.14.0",
     "mocha": "^3.2.0",
-    "multiline": "^1.0.2"
+    "multiline": "^1.0.2",
+    "sinon": "^6.1.5"
   },
   "keywords": [
     "ember-addon",
@@ -34,9 +36,9 @@
     "chalk": "^1.1.3",
     "core-object": "^2.0.6",
     "ember-cli-deploy-plugin": "^0.2.9",
+    "ioredis": "^3.2.2",
     "redis": "^2.6.3",
-    "rsvp": "^3.0.18",
-    "then-redis": "^2.0.1"
+    "rsvp": "^3.0.18"
   },
   "ember-addon": {
     "configPath": "tests/dummy/config"