Add retry for email sending (#2963).

1 files changed, 43 insertions, 0 deletions

diff --git a/test/email_test.cc b/test/email_test.cc
new file mode 100644
index 000000000..2402c1d07
--- /dev/null
+++ b/test/email_test.cc
@@ -0,0 +1,43 @@
+/*
+    Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "lib/email.h"
+#include "smtp_server.h"
+#include "test.h"
+#include <boost/test/unit_test.hpp>
+#include <boost/thread.hpp>
+
+
+auto constexpr port = 31925;
+
+
+BOOST_AUTO_TEST_CASE(email_retry_test)
+{
+	boost::thread thread([]() {
+		run_smtp_server(port, true);
+		run_smtp_server(port, true);
+		run_smtp_server(port, false);
+	});
+
+	Email email("carl@crunchcinema.com", { "bob@snacks.com" }, "Louder crisps - possible?", "These crisps just aren't loud enough.  People can still hear the film.");
+	email.send_with_retry("localhost", port, EmailProtocol::PLAIN, 3);
+}
+