Add new accessors to help determine whether to use the SMTPUTF8 extension

Author: arnt

Envelope.php

@@ -85,4 +85,17 @@ public function getRecipients(): array
     {
         return $this->recipients;
     }
+
+    /**
+      * @return bool
+      */
+    public function anyAddressHasUnicodeLocalpart(): bool
+    {
+        if($this->sender->hasUnicodeLocalpart())
+            return true;
+        foreach($this->recipients as $r)
+            if($r->hasUnicodeLocalpart())
+                return true;
+        return false;
+    }
 }

Tests/EnvelopeTest.php

@@ -127,6 +127,19 @@ public function testRecipientsFromHeaders()
         $this->assertEquals([new Address('[email protected]'), new Address('[email protected]'), new Address('[email protected]')], $e->getRecipients());
     }
 
+    public function testUnicodeLocalparts()
+    {
+        /* dømi means example and is reserved by the .fo registry */
+        $i = new Address('info@dømi.fo');
+        $d = new Address('dømi@dømi.fo');
+        $e = new Envelope($i, [$i]);
+        $this->assertFalse($e->anyAddressHasUnicodeLocalpart());
+        $e = new Envelope($i, [$d]);
+        $this->assertTrue($e->anyAddressHasUnicodeLocalpart());
+        $e = new Envelope($i, [$i, $d]);
+        $this->assertTrue($e->anyAddressHasUnicodeLocalpart());
+    }
+
     public function testRecipientsFromHeadersWithNames()
     {
         $headers = new Headers();