diff --git a/phpunit.xml b/phpunit.xml
index 45a40e5..fd1a656 100755
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -14,6 +14,11 @@
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>
+    <filter>
+        <whitelist>
+            <directory suffix=".php">src/</directory>
+        </whitelist>
+    </filter>
     <php>
     </php>
 </phpunit>
\ No newline at end of file
diff --git a/src/Validator.php b/src/Validator.php
index e45c62d..853640f 100755
--- a/src/Validator.php
+++ b/src/Validator.php
@@ -28,21 +28,21 @@ class Validator
     public function validate(array $data, array $rule, array $message)
     {
         foreach ($rule as $key => $val) {
-
             $temp = explode('|', $val);
             $params = $temp;
 
             foreach ($params as $value) {
-
                 if (!array_key_exists($key, $rule)) {
-
                     continue;
                 }
 
+                if (!isset($data[$key])) {
+                    throw new \Exception('missing parameter');
+                }
+
                 $args = [$data[$key]];
 
                 if (strpos($value, ':') !== false) {
-
                     $tmp = explode(':', $value);
 
                     $func = '_' . $tmp[0];
@@ -50,14 +50,12 @@ public function validate(array $data, array $rule, array $message)
 
                     unset($tmp);
                 } else {
-
                     $func = '_' . $value;
                 }
 
                 $ret = call_user_func_array([$this, $func], $args);
 
                 if ($ret === false) {
-
                     $this->message = vsprintf($message[$key], $args);
 
                     return false;
@@ -134,10 +132,8 @@ private function _url($value)
     private function _min($value, $length)
     {
         if (is_numeric($value)) {
-
             return $value >= (int)$length ? true : false;
         } else {
-
             return strlen($value) >= (int)$length ? true : false;
         }
     }
@@ -152,10 +148,8 @@ private function _min($value, $length)
     private function _max($value, $length)
     {
         if (is_numeric($value)) {
-
             return $value <= (int)$length ? true : false;
         } else {
-
             return strlen($value) <= (int)$length ? true : false;
         }
     }
@@ -166,9 +160,10 @@ private function _max($value, $length)
      * @param string $value
      * @return bool
      */
-    private function _ip($value)
+    private function _ip($value, $type = 'ipv4')
     {
-        return filter_var($value, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) !== false ? true : false;
+        $ipType = strtolower($type) !== 'ipv6' ? FILTER_FLAG_IPV4 : FILTER_FLAG_IPV6;
+        return filter_var($value, FILTER_VALIDATE_IP, $ipType) !== false ? true : false;
     }
 
     /**
@@ -214,34 +209,32 @@ private function _id_card($value)
     {
         // 只能是18位
         if (strlen($value) != 18) {
-
             return false;
         }
 
         // 取出本体码
-        $idcard_base = substr($value, 0, 17);
+        $idCardBase = substr($value, 0, 17);
 
         // 取出校验码
-        $verify_code = substr($value, 17, 1);
+        $verifyCode = substr($value, 17, 1);
 
         // 加权因子
         $factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
 
         // 校验码对应值
-        $verify_code_list = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
+        $verifyCodeList = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
 
         // 根据前17位计算校验码
         $total = 0;
         for ($i = 0; $i < 17; $i++) {
-
-            $total += substr($idcard_base, $i, 1) * $factor[$i];
+            $total += substr($idCardBase, $i, 1) * $factor[$i];
         }
 
         // 取模
         $mod = $total % 11;
 
         // 比较校验码
-        return $verify_code == $verify_code_list[$mod] ? true : false;
+        return $verifyCode == $verifyCodeList[$mod] ? true : false;
     }
 
     /**
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 8462a36..88aaae8 100755
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -5,4 +5,4 @@
 class TestCase extends \PHPUnit_Framework_TestCase
 {
 
-}
\ No newline at end of file
+}
diff --git a/tests/ValidatorTest.php b/tests/ValidatorTest.php
index 8dcd059..fabf814 100755
--- a/tests/ValidatorTest.php
+++ b/tests/ValidatorTest.php
@@ -7,6 +7,18 @@
 class ValidatorTest extends TestCase
 {
 
+    /**
+     *
+     * @expectedException \Exception
+     *
+     * @return void
+     */
+    public function testException()
+    {
+        $validator = new Validator();
+        $validator->validate(['a' => ''], ['test' => 'required'], ['test' => 'empty']);
+    }
+
     public function testRequired()
     {
         $validator = new Validator();
@@ -69,15 +81,15 @@ public function testPhone()
         $ret = $validator->validate(['test' => '17071106666'], ['test' => 'phone'], ['test' => 'nophone']);
 
         $this->assertTrue($ret);
-        
+
         $ret = $validator->validate(['test' => '17571106666'], ['test' => 'phone'], ['test' => 'nophone']);
 
         $this->assertTrue($ret);
-        
+
         $ret = $validator->validate(['test' => '19971106666'], ['test' => 'phone'], ['test' => 'nophone']);
 
         $this->assertTrue($ret);
-        
+
         $ret = $validator->validate(['test' => '16671106666'], ['test' => 'phone'], ['test' => 'nophone']);
 
         $this->assertTrue($ret);
@@ -95,8 +107,10 @@ public function testIp()
     {
         $validator = new Validator();
         $ret = $validator->validate(['test' => '192.168.1.1'], ['test' => 'ip'], ['test' => 'noip']);
+        $ret1 = $validator->validate(['test' => '2001:da8:8000:1::81'], ['test' => 'ip:ipv6'], ['test' => 'noip']);
 
         $this->assertTrue($ret);
+        $this->assertTrue($ret1);
     }
 
     public function testIdCard()
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index efff6b8..80b4ecf 100755
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,2 +1,2 @@
 <?php
-$loader = require __DIR__ . '/../vendor/autoload.php';
\ No newline at end of file
+$loader = require __DIR__ . '/../vendor/autoload.php';