fixes #43: throw an LogicException on un/-serialize an enumeration instance

Author: marc-mabe

src/MabeEnum/Enum.php

@@ -75,6 +75,24 @@ final private function __clone()
         throw new LogicException('Enums are not cloneable');
     }
 
+    /**
+     * @throws LogicException Enums are not serializable
+     *                        because instances are implemented as singletons
+     */
+    final public function __sleep()
+    {
+        throw new LogicException('Enums are not serializable');
+    }
+
+    /**
+     * @throws LogicException Enums are not serializable
+     *                        because instances are implemented as singletons
+     */
+    final public function __wakeup()
+    {
+        throw new LogicException('Enums are not serializable');
+    }
+
     /**
      * Get the current selected value
      *

tests/MabeEnumTest/EnumTest.php

@@ -224,4 +224,18 @@ public function testCloneNotCallableAndThrowsLogicException()
         $this->setExpectedException('LogicException');
         $reflectionMethod->invoke($enum);
     }
+
+    public function testNotSerializable()
+    {
+        $enum = EnumBasic::ONE();
+
+        $this->setExpectedException('LogicException');
+        serialize($enum);
+    }
+
+    public function testNotUnserializable()
+    {
+        $this->setExpectedException('LogicException');
+        unserialize("O:32:\"MabeEnumTest\TestAsset\EnumBasic\":0:{}");
+    }
 }