Fix some errors detected by PHPStan

This also made me realise that we had a bug in that rule.

Author: henriquemoody

library/Rules/Cnh.php

@@ -15,6 +15,7 @@
 
 use function is_scalar;
 use function mb_strlen;
+use function preg_match;
 use function preg_replace;
 
 #[Attribute(Attribute::TARGET_PROPERTY | Attribute::IS_REPEATABLE)]
@@ -34,7 +35,11 @@ public function isValid(mixed $input): bool
         $input = (string) preg_replace('{\D}', '', (string) $input);
 
         // Validate length and invalid numbers
-        if (mb_strlen($input) != 11 || ((int) $input === 0)) {
+        if (mb_strlen($input) != 11) {
+            return false;
+        }
+
+        if (preg_match('/^(\d)\1{10}/', $input) > 0) {
             return false;
         }
 

tests/unit/Rules/CnhTest.php

@@ -14,6 +14,8 @@
 use Respect\Validation\Test\RuleTestCase;
 use stdClass;
 
+use function str_repeat;
+
 #[Group('rule')]
 #[CoversClass(Cnh::class)]
 final class CnhTest extends RuleTestCase
@@ -132,6 +134,16 @@ public static function providerForInvalidInput(): iterable
             [$rule, '0034172483001'],
             [$rule, '00006700431345'],
             [$rule, '0032926944005'],
+            [$rule, str_repeat('0', 11)],
+            [$rule, str_repeat('1', 11)],
+            [$rule, str_repeat('2', 11)],
+            [$rule, str_repeat('3', 11)],
+            [$rule, str_repeat('4', 11)],
+            [$rule, str_repeat('5', 11)],
+            [$rule, str_repeat('6', 11)],
+            [$rule, str_repeat('7', 11)],
+            [$rule, str_repeat('8', 11)],
+            [$rule, str_repeat('9', 11)],
         ];
     }
 }