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-rw-r--r--MANIFEST1
-rw-r--r--t/msg_iter.t20
-rw-r--r--t/x-unknown-alpine.eml21
3 files changed, 42 insertions, 0 deletions
diff --git a/MANIFEST b/MANIFEST
index 5acd8531..48df274e 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -299,6 +299,7 @@ t/watch_maildir.t
 t/watch_maildir_v2.t
 t/www_listing.t
 t/www_static.t
+t/x-unknown-alpine.eml
 t/xcpdb-reshard.t
 xt/git-http-backend.t
 xt/git_async_cmp.t
diff --git a/t/msg_iter.t b/t/msg_iter.t
index de9c39fa..e33bfc69 100644
--- a/t/msg_iter.t
+++ b/t/msg_iter.t
@@ -4,6 +4,7 @@ use strict;
 use warnings;
 use Test::More;
 use Email::MIME;
+use PublicInbox::Hval qw(ascii_html);
 use_ok('PublicInbox::MsgIter');
 
 {
@@ -58,5 +59,24 @@ use_ok('PublicInbox::MsgIter');
         is(index($raw, '$$$'), -1, 'no unescaped $$$');
 }
 
+{
+        my $f = 't/x-unknown-alpine.eml';
+        my $mime = Email::MIME->new(do {
+                open my $fh, '<', $f or die "open($f): $!";
+                local $/;
+                binmode $fh;
+                <$fh>;
+        });
+        my $raw = '';
+        msg_iter($mime, sub {
+                my ($part, $level, @ex) = @{$_[0]};
+                my ($s, $err) = msg_part_text($part, 'text/plain');
+                $raw .= $s;
+        });
+        like($raw, qr!^\thttps://!ms, 'tab expanded with X-UNKNOWN');
+        like(ascii_html($raw), qr/&#8226; bullet point/s,
+                'got bullet point when X-UNKNOWN assumes UTF-8');
+}
+
 done_testing();
 1;
diff --git a/t/x-unknown-alpine.eml b/t/x-unknown-alpine.eml
new file mode 100644
index 00000000..75b0bc55
--- /dev/null
+++ b/t/x-unknown-alpine.eml
@@ -0,0 +1,21 @@
+Date:        Sat, 13 Aug 2016 12:14:15 +0200 (CEST)
+From:        Alpine User <a@example.com>
+To: <list@example.com>
+Subject: charset=X-UNKNOWN test
+Message-ID: <alpine.DEB.2.20.1608131214070.4924@example>
+User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
+MIME-Version: 1.0
+Content-Type: multipart/mixed; BOUNDARY="8323329-703494712-1471083256=:4924"
+
+  This message is in MIME format.  The first part should be readable text,
+  while the remaining parts are likely unreadable without MIME-aware tools.
+
+--8323329-703494712-1471083256=:4924
+Content-Type: text/plain; charset=X-UNKNOWN
+Content-Transfer-Encoding: QUOTED-PRINTABLE
+
+=09https://example.com/
+
+  =E2=80=A2 bullet point
+
+--8323329-703494712-1471083256=:4924--