Improve the coverage (#12)

Author: dbalabka

src/Enumeration/Enumeration.php

@@ -161,16 +161,6 @@ final public function __clone()
      * Serialization is not allowed right now. It is not possible to properly serialize the singleton.
      * See the documentation for workaround.
      */
-    final public function __sleep()
-    {
-        throw new EnumerationException('Enum serialization is not allowed');
-    }
-
-    final public function __wakeup()
-    {
-        throw new EnumerationException('Enum unserialization is not allowed');
-    }
-
     final public function __serialize()
     {
         throw new EnumerationException('Enum serialization is not allowed');

tests/Enumeration/EnumerationTest.php

@@ -97,12 +97,12 @@ public function testSerialization()
     public function testUnserialization()
     {
         Flag::initialize();
+        $this->expectException(EnumerationException::class);
         if (version_compare(PHP_VERSION, '7.4.0-dev', '<')) {
-            $this->expectException(Warning::class);
+            unserialize('C:40:"Dbalabka\\Enumeration\\Tests\\Fixtures\\Flag":24:{a:1:{s:7:"ordinal";i:2;}}');
         } else {
-            $this->expectException(EnumerationException::class);
+            unserialize('O:40:"Dbalabka\\Enumeration\\Tests\\Fixtures\\Flag":1:{s:7:"ordinal";i:2;}');
         }
-        unserialize('O:40:"Dbalabka\Enumeration\Tests\Fixtures\Flag":2:{s:51:" Dbalabka\Enumeration\Tests\Fixtures\Flag flagValue";i:2;s:10:" * ordinal";i:1;}');
     }
 
     public function testClone()