Converts the matched term to lower case before detecting the used mec…

…hanism. (#50)

Fixes #49

src/Model/Record.php

@@ -55,7 +55,7 @@ public function getTerms(): iterable
             }
             $cidr4 = array_key_exists('cidr4', $matches) && $matches['cidr4'] !== '' ? intval($matches['cidr4']) : null;
             $cidr6 = array_key_exists('cidr6', $matches) && $matches['cidr6'] !== '' ? intval($matches['cidr6']) : null;
-            switch($matches['term']) {
+            switch(strtolower($matches['term'])) {
                 case Mechanism::ALL:
                     yield new All($term, $matches['qualifier']);
                     break;

tests/issue49/issue49-tests.yml

@@ -0,0 +1,16 @@
+description: Issue 49
+tests:
+  include-permerror:
+    description: >-
+      Accept different upper and lower case mechanisms
+    helo: mail.example.net
+    host: 127.0.0.1
+    mailfrom: [email protected]
+    result: pass
+zonedata:
+  example.com:
+    - SPF: 'v=spf1 iP4:127.0.0.1 ~aLL'
+  example.net:
+    - SPF: 'v=spf1 +All'
+  example.org:
+    - SPF: 'v=spf1 +IP4:127.0.0.1 -ALL'