Merge branch 'hotfix/zf2-512'

Close zendframework/zendframework#2276

src/FilterChain.php

@@ -228,11 +228,22 @@ public function filter($value)
 
     /**
      * Clone filters
-     *
-     * @return void
      */
     public function __clone()
     {
         $this->filters = clone $this->filters;
     }
+
+    /**
+     * Prepare filter chain for serialization
+     *
+     * Plugin manager (property 'plugins') cannot
+     * be serialized. On wakeup the property remains unset
+     * and next invokation to getPluginManager() sets
+     * the default plugin manager instance (FilterPluginManager).
+     */
+    public function __sleep()
+    {
+        return array('filters');
+    }
 }

test/FilterChainTest.php

@@ -168,6 +168,21 @@ public function testClone()
 
         $this->assertCount(0, $clone);
     }
+
+    public function testCanSerializeFilterChain()
+    {
+        $chain = new FilterChain();
+        $chain->attach(new LowerCase())
+              ->attach(new StripUpperCase());
+        $serialized = serialize($chain);
+
+        $unserialized = unserialize($serialized);
+        $this->assertInstanceOf('Zend\Filter\FilterChain', $unserialized);
+        $this->assertEquals(2, count($unserialized));
+        $value         = 'AbC';
+        $valueExpected = 'abc';
+        $this->assertEquals($valueExpected, $unserialized->filter($value));
+    }
 }