Allow tld as DomainValue

Author: tvdijen

src/Assert/DomainTrait.php

@@ -14,7 +14,7 @@ trait DomainTrait
 {
     private static string $domain_regex = '/^
       (?!\-)
-      (?:(?:[a-zA-Z\d][a-zA-Z\d\-]{0,61})?[a-zA-Z\d]\.){1,126}
+      (?:(?:[a-zA-Z\d][a-zA-Z\d\-]{0,61})?[a-zA-Z\d]\.){0,126}
       (?!\d+)[a-zA-Z\d]{1,63}
       $/Dxi';
 

tests/SAML2/Assert/DomainTest.php

@@ -45,7 +45,8 @@ public static function provideDomain(): array
             'ipv4' => [false, '192.168.0.1'],
             'ipv6' => [false, '2001:0000:130F:0000:0000:09C0:876A:130B'],
             'with scheme' => [false, 'https://simplesamlphp.org'],
-            'tld' => [false, '.org'],
+            'start with dot' => [false, '.org'],
+            'tld' => [true, 'nl'],
         ];
     }
 }