+{
+ my $l = PublicInbox::Linkify->new;
+ my $u = 'http://example.com/url-with-(parens)';
+ my $s = "hello $u world";
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq(hello <a\nhref="$u">$u</a> world), 'URL preserved');
+
+ $s = "$u. hi";
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq(<a\nhref="$u">$u</a>. hi), 'paired () in URL OK');
+
+ $u .= "?query=a";
+ $s = "hello $u world";
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq(hello <a\nhref="$u">$u</a> world), 'query preserved');
+
+ $u .= "#fragment";
+ $s = "hello $u world";
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq(hello <a\nhref="$u">$u</a> world),
+ 'query + fragment preserved');
+
+ $u = "http://example.com/";
+ $s = "hello $u world";
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq(hello <a\nhref="$u">$u</a> world), "root URL preserved");
+
+ $u = "http://example.com/#fragment";
+ $s = "hello $u world";
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq(hello <a\nhref="$u">$u</a> world), "root + fragment");
+}
+
+# Markdown compatibility
+{
+ my $l = PublicInbox::Linkify->new;
+ my $u = 'http://example.com/';
+ my $s = "[markdown]($u)";
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq![markdown](<a\nhref="$u">$u</a>)!, 'Markdown-compatible');
+
+ $s = qq![markdown]($u "title")!;
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq![markdown](<a\nhref="$u">$u</a> "title")!,
+ 'Markdown title compatible');
+
+ $s = qq![markdown]($u).!;
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ is($s, qq![markdown](<a\nhref="$u">$u</a>).!,
+ 'Markdown-compatible end of sentence');
+}
+
+# Perl and Ruby code compatibility
+{
+ my $l = PublicInbox::Linkify->new;
+ my $u = 'http://example.com/';
+ foreach my $q ("'%s'", '"%s"', 'q!%s!', 'q(%s)') {
+ # Perl
+ my $s = sprintf("my \$var = $q;", $u);
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ like($s, qr/>\Q$u\E</, "no quote($q) in URL");
+
+ # applies to Ruby, too
+ $s = sprintf("$q,", $u);
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ like($s, qr/>\Q$u\E</, "no quote($q) in URL array");
+ }
+}
+
+# dangling ')' cf. see MaintNotes in git.git todo branch
+{
+ my $l = PublicInbox::Linkify->new;
+ my $s = '(see http://example.com/).';
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ like($s, qr!\(see <a[^>]+>http://example\.com/</a>\)\.!s,
+ 'punctuation with unpaired ) OK')
+}
+
+if ('IDN example: <ACDB98F4-178C-43C3-99C4-A1D03DD6A8F5@sb.org>') {
+ my $hc = '月';
+ my $u = "http://www.\x{6708}.example.com/";
+ my $s = $u;
+ my $l = PublicInbox::Linkify->new;
+ $s = $l->linkify_1($s);
+ $s = $l->linkify_2($s);
+ my $expect = qq{<a
+href="http://www.$hc.example.com/">http://www.$hc.example.com/</a>};
+ is($s, $expect, 'IDN message escaped properly');
+}
+
+{
+ my $false_positive = 'LINKIFY'.('A' x 40);
+ is(PublicInbox::Linkify->new->to_html($false_positive),
+ $false_positive, 'false-positive left as-is');
+}