mid: add `mids' and `references' methods for extraction

We'll be using a more consistent API for extracting Message-IDs
from various headers.

1 files changed, 21 insertions, 1 deletions

diff --git a/t/mid.t b/t/mid.t
index 0bf33318..223be798 100644
--- a/t/mid.t
+++ b/t/mid.t
@@ -1,11 +1,31 @@
 # Copyright (C) 2016-2018 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 use Test::More;
-use PublicInbox::MID qw(mid_escape);
+use PublicInbox::MID qw(mid_escape mids references);
 
 is(mid_escape('foo!@(bar)'), 'foo!@(bar)');
 is(mid_escape('foo%!@(bar)'), 'foo%25!@(bar)');
 is(mid_escape('foo%!@(bar)'), 'foo%25!@(bar)');
 
+{
+        use Email::MIME;
+        my $mime = Email::MIME->create;
+        $mime->header_set('Message-Id', '<mid-1@a>');
+        is_deeply(['mid-1@a'], mids($mime->header_obj), 'mids in common case');
+        $mime->header_set('Message-Id', '<mid-1@a>', '<mid-2@b>');
+        is_deeply(['mid-1@a', 'mid-2@b'], mids($mime->header_obj), '2 mids');
+        $mime->header_set('Message-Id', '<mid-1@a>', '<mid-1@a>');
+        is_deeply(['mid-1@a'], mids($mime->header_obj), 'dup mids');
+        $mime->header_set('Message-Id', '<mid-1@a> comment');
+        is_deeply(['mid-1@a'], mids($mime->header_obj), 'comment ignored');
+        $mime->header_set('Message-Id', 'bare-mid');
+        is_deeply(['bare-mid'], mids($mime->header_obj), 'bare mid OK');
+
+        $mime->header_set('References', '<hello> <world>');
+        $mime->header_set('In-Reply-To', '<weld>');
+        is_deeply(['hello', 'world', 'weld'], references($mime->header_obj),
+                'references combines with In-Reply-To');
+}
+
 done_testing();
 1;