Avoid to serialize/deserialize Singleton classes Issue #2

Author: byjg

src/Singleton.php

@@ -16,6 +16,22 @@ final public function __clone()
         throw new SingletonException('You can not clone a singleton.');
     }
 
+    /**
+     * @throws SingletonException
+     */
+    final public function __sleep()
+    {
+        throw new SingletonException('You can not serialize a singleton.');
+    }
+
+    /**
+     * @throws SingletonException
+     */
+    final public function __wakeup()
+    {
+        throw new SingletonException('You can not deserialize a singleton.');
+    }
+
     /**
      * @return static
      */

tests/SingletonTest.php

@@ -45,4 +45,12 @@ public function testClone()
         $sample2 = clone $sample1;
     }
 
+    /**
+     * @expectedException \ByJG\DesignPattern\SingletonException
+     */
+    public function testSerialize()
+    {
+        $sample1 = Sample1::getInstance();
+        $serialize = serialize($sample1);
+    }
 }