Merge branch '4.1'

* 4.1:
  [DoctrineBridge] support __toString as documented for UniqueEntityValidator
  [travis] enable Redis cluster
  [Cache] enable Memcached::OPT_TCP_NODELAY to fix perf of misses
  fix data mapper return type in docblock
  fix type error handling when writing values

Author: nicolas-grekas

Store/RedisStore.php

@@ -54,8 +54,10 @@ public function save(Key $key)
         $script = '
             if redis.call("GET", KEYS[1]) == ARGV[1] then
                 return redis.call("PEXPIRE", KEYS[1], ARGV[2])
+            elseif redis.call("SET", KEYS[1], ARGV[1], "NX", "PX", ARGV[2]) then
+                return 1
             else
-                return redis.call("set", KEYS[1], ARGV[1], "NX", "PX", ARGV[2])
+                return 0
             end
         ';
 
@@ -140,7 +142,7 @@ private function evaluate(string $script, string $resource, array $args)
             return \call_user_func_array(array($this->redis, 'eval'), array_merge(array($script, 1, $resource), $args));
         }
 
-        throw new InvalidArgumentException(sprintf('%s() expects been initialized with a Redis, RedisArray, RedisCluster or Predis\Client, %s given', __METHOD__, \is_object($this->redis) ? \get_class($this->redis) : \gettype($this->redis)));
+        throw new InvalidArgumentException(sprintf('%s() expects being initialized with a Redis, RedisArray, RedisCluster or Predis\Client, %s given', __METHOD__, \is_object($this->redis) ? \get_class($this->redis) : \gettype($this->redis)));
     }
 
     /**

Tests/Store/RedisClusterStoreTest.php

@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Lock\Tests\Store;
+
+/**
+ * @author Jérémy Derussé <jeremy@derusse.com>
+ *
+ * @requires extension redis
+ */
+class RedisClusterStoreTest extends AbstractRedisStoreTest
+{
+    public static function setupBeforeClass()
+    {
+        if (!class_exists('RedisCluster')) {
+            self::markTestSkipped('The RedisCluster class is required.');
+        }
+        if (!getenv('REDIS_CLUSTER_HOSTS')) {
+            self::markTestSkipped('REDIS_CLUSTER_HOSTS env var is not defined.');
+        }
+    }
+
+    protected function getRedisConnection()
+    {
+        return new \RedisCluster(null, explode(' ', getenv('REDIS_CLUSTER_HOSTS')));
+    }
+}