Merge pull request #71 from osavchenko/allow_null_in_equals

allow null in equals

Author: mnapoli

src/Enum.php

@@ -80,9 +80,9 @@ public function __toString()
      *
      * @return bool True if Enums are equal, false if not equal
      */
-    final public function equals(Enum $enum)
+    final public function equals(Enum $enum = null)
     {
-        return $this->getValue() === $enum->getValue() && get_called_class() == get_class($enum);
+        return $enum !== null && $this->getValue() === $enum->getValue() && get_called_class() == get_class($enum);
     }
 
     /**

tests/EnumTest.php

@@ -223,6 +223,7 @@ public function testEquals()
         $this->assertTrue($foo->equals($foo));
         $this->assertFalse($foo->equals($number));
         $this->assertTrue($foo->equals($anotherFoo));
+        $this->assertFalse($foo->equals(null));
     }
 
     /**