Fix to allow empty address groups #241

Author: zbateson

src/Header/Consumer/AddressGroupConsumerService.php

@@ -8,6 +8,7 @@
 namespace ZBateson\MailMimeParser\Header\Consumer;
 
 use Psr\Log\LoggerInterface;
+use Iterator;
 use ZBateson\MailMimeParser\Header\Part\AddressGroupPart;
 use ZBateson\MailMimeParser\Header\Part\HeaderPartFactory;
 
@@ -72,6 +73,22 @@ protected function isStartToken(string $token) : bool
         return ($token === ':');
     }
 
+    /**
+     * Overridden to always call processParts even for an empty set of
+     * addresses, since a group could be empty.
+     *
+     * @param Iterator $tokens
+     * @return IHeaderPart[]
+     */
+    protected function parseTokensIntoParts(Iterator $tokens) : array
+    {
+        $ret = parent::parseTokensIntoParts($tokens);
+        if ($ret === []) {
+          return $this->processParts([]);
+        }
+        return $ret;
+    }
+
     /**
      * Performs post-processing on parsed parts.
      *

tests/MailMimeParser/Header/AddressHeaderTest.php

@@ -230,4 +230,18 @@ public function testGetGroups() : void
         $this->assertSame($parts[0], $groups[0]);
         $this->assertSame($parts[1], $groups[1]);
     }
+
+    public function testEmptyAddressGroup() : void
+    {
+        $header = $this->newAddressHeader(
+            'Cc',
+            'House Stark:;'
+        );
+        $parts = $header->getParts();
+        $this->assertCount(1, $parts);
+
+        $starks = $parts[0];
+        $this->assertEquals('House Stark', $starks->getName());
+        $this->assertCount(0, $starks->getAddresses());
+    }
 }