diff --git a/test/phpunit/Functions2LibTest.php b/test/phpunit/Functions2LibTest.php
index 8e4bfe7550f..ab792a10183 100755
--- a/test/phpunit/Functions2LibTest.php
+++ b/test/phpunit/Functions2LibTest.php
@@ -154,4 +154,41 @@ class Functions2LibTest extends PHPUnit_Framework_TestCase
     	$this->assertEquals(0,$result);
     }
 
+    /**
+     * isIP
+     *
+     * @return	void
+     */
+    public function testIsIP()
+    {
+    	$ip='a299.299.299.299';
+    	$result=is_ip($ip);
+        print __METHOD__." for ".$ip." result=".$result."\n";
+    	$this->assertEquals(0,$result,$ip);
+
+    	$ip='1.2.3.4';
+    	$result=is_ip($ip);
+        print __METHOD__." for ".$ip." result=".$result."\n";
+    	$this->assertEquals(1,$result,$ip);
+
+    	$ip='10.0.0.0';
+    	$result=is_ip($ip);
+        print __METHOD__." for ".$ip." result=".$result."\n";
+    	$this->assertEquals(2,$result,$ip);
+
+    	$ip='172.16.0.0';
+    	$result=is_ip($ip);
+        print __METHOD__." for ".$ip." result=".$result."\n";
+    	$this->assertEquals(2,$result,$ip);
+
+    	$ip='192.168.0.0';
+    	$result=is_ip($ip);
+        print __METHOD__." for ".$ip." result=".$result."\n";
+    	$this->assertEquals(2,$result,$ip);
+
+    	$ip='169.254.0.0';
+    	$result=is_ip($ip);
+        print __METHOD__." for ".$ip." result=".$result."\n";
+    	$this->assertEquals(2,$result,$ip);
+    }
 }