stream HTML views as much as possible

This should allow progressive rendering on the client and reduce
memory usage on the server.  Unfortunately XML::Atom::SimpleFeed
does not yet support streaming, so we may not use it in the
future.

1 files changed, 13 insertions, 1 deletions

diff --git a/t/html_index.t b/t/html_index.t
index 690368f1..6286fc47 100644
--- a/t/html_index.t
+++ b/t/html_index.t
@@ -50,11 +50,23 @@ EOF
 
 # check HTML index
 {
-        my $feed = PublicInbox::Feed->generate_html_index({
+        use IO::File;
+        my $cb = PublicInbox::Feed::generate_html_index({
                 git_dir => $git_dir,
                 max => 3
         });
+        my $headers;
+        my $io = IO::File->new_tmpfile;
+        use POSIX qw/dup/;
+        my $dup = dup($io->fileno);
+        my $response = sub { $headers = \@_, $io };
+        $cb->($response);
+        $io = IO::File->new;
+        $io->fdopen($dup, 'r+');
+        $io->seek(0, 0);
+        $io->read(my $feed, 666666);
         like($feed, qr/html/, "feed is valid HTML :)");
+        $io->close;
 }
 
 done_testing();