Tighten rules, no API changes

Author: ultrono

README.md

@@ -1,4 +1,4 @@
-[![Latest Stable Version](https://poser.pugx.org/f9webltd/laravel-validation-rules/v)](https://packagist.org/packages/f9webltd/laravel-validation-rules)
+[![Latest Stable Version](https://img.shields.io/packagist/v/f9webltd/laravel-validation-rules)](https://packagist.org/packages/f9webltd/laravel-validation-rules)
 [![Scrutinizer coverage (GitHub/BitBucket)](https://img.shields.io/scrutinizer/coverage/g/f9webltd/laravel-validation-rules)]()
 [![Scrutinizer code quality (GitHub/Bitbucket)](https://img.shields.io/scrutinizer/quality/g/f9webltd/laravel-validation-rules)]()
 [![Build Status](https://travis-ci.org/f9webltd/laravel-validation-rules.svg)](https://travis-ci.org/f9webltd/laravel-validation-rules)

src/Rules/NoWhitespace.php

@@ -18,6 +18,10 @@ public function passes($attribute, $value): bool
     {
         $this->setAttribute($attribute);
 
+        if (null === $value) {
+            return true;
+        }
+
         return preg_match('/\s/', $value) === 0;
     }
 }

src/Rules/Uppercase.php

@@ -6,6 +6,7 @@
 
 use F9Web\ValidationRules\Rule;
 use function is_string;
+use function mb_detect_encoding;
 use function mb_strtoupper;
 
 class Uppercase extends Rule
@@ -19,10 +20,10 @@ public function passes($attribute, $value): bool
     {
         $this->setAttribute($attribute);
 
-        if (! is_string($value)) {
+        if (!is_string($value)) {
             return false;
         }
 
-        return mb_strtoupper($value, 'UTF-8') === (string) $value;
+        return (string) $value === mb_strtoupper($value, mb_detect_encoding($value));
     }
 }