Assert values are strings before ctype checks, fixes #197

Author: shadowhand

CHANGELOG.md

@@ -8,6 +8,7 @@ Changelog
 - Corrected messages and typos in various assertions.
 - Document `void` return type.
 - Prevent UUIDs with trailing newlines from validating.
+- Assert values are strings before ctype checks.
 
 ## 1.11.0
 

src/Assert.php

@@ -1402,6 +1402,8 @@ public static function alpha($value, $message = '')
      */
     public static function digits($value, $message = '')
     {
+        static::string($value);
+
         $locale = \setlocale(LC_CTYPE, 0);
         \setlocale(LC_CTYPE, 'C');
         $valid = !\ctype_digit($value);
@@ -1427,6 +1429,8 @@ public static function digits($value, $message = '')
      */
     public static function alnum($value, $message = '')
     {
+        static::string($value);
+
         $locale = \setlocale(LC_CTYPE, 0);
         \setlocale(LC_CTYPE, 'C');
         $valid = !\ctype_alnum($value);
@@ -1454,6 +1458,8 @@ public static function alnum($value, $message = '')
      */
     public static function lower($value, $message = '')
     {
+        static::string($value);
+
         $locale = \setlocale(LC_CTYPE, 0);
         \setlocale(LC_CTYPE, 'C');
         $valid = !\ctype_lower($value);
@@ -1481,6 +1487,8 @@ public static function lower($value, $message = '')
      */
     public static function upper($value, $message = '')
     {
+        static::string($value);
+
         $locale = \setlocale(LC_CTYPE, 0);
         \setlocale(LC_CTYPE, 'C');
         $valid = !\ctype_upper($value);

tests/AssertTest.php

@@ -377,17 +377,21 @@ public function getTests()
             array('digits', array('1234'), true),
             array('digits', array('12a34'), false),
             array('digits', array(''), false),
+            array('digits', array(1234), false),
             array('alnum', array('ab12'), true),
             array('alnum', array('ab12$'), false),
             array('alnum', array(''), false),
+            array('alnum', array(1234), false),
             array('lower', array('abcd'), true),
             array('lower', array('abCd'), false),
             array('lower', array('ab_d'), false),
             array('lower', array(''), false),
+            array('lower', array(1234), false),
             array('upper', array('ABCD'), true),
             array('upper', array('ABcD'), false),
             array('upper', array('AB_D'), false),
             array('upper', array(''), false),
+            array('upper', array(1234), false),
             array('length', array('abcd', 4), true),
             array('length', array('abc', 4), false),
             array('length', array('abcde', 4), false),