--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/3rdparty/vmime/tests/parser/messageTest.cpp	Tue Aug 17 11:19:54 2021 +0200
@@ -0,0 +1,57 @@
+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002-2013 Vincent Richard <vincent@vmime.org>
+//
+// This program 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 3 of
+// the License, or (at your option) any later version.
+//
+// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// Linking this library statically or dynamically with other modules is making
+// a combined work based on this library.  Thus, the terms and conditions of
+// the GNU General Public License cover the whole combination.
+//
+
+#include "tests/testUtils.hpp"
+
+
+VMIME_TEST_SUITE_BEGIN(messageTest)
+
+	VMIME_TEST_LIST_BEGIN
+		VMIME_TEST(testGetGeneratedSize)
+	VMIME_TEST_LIST_END
+
+
+	void testGetGeneratedSize()
+	{
+		vmime::generationContext ctx;
+
+		vmime::shared_ptr <vmime::message> msg = vmime::make_shared <vmime::message>();
+		msg->getHeader()->getField("Foo")->setValue(vmime::string("bar"));
+
+		vmime::htmlTextPart textPart;
+		textPart.setPlainText(vmime::make_shared <vmime::stringContentHandler>("Foo bar bazé foo foo foo"));
+		textPart.setText(vmime::make_shared <vmime::stringContentHandler>("Foo bar <strong>bazé</strong> foo foo foo"));
+		textPart.generateIn(msg, msg);
+
+		// Estimated/computed generated size must be greater than the actual generated size
+		const vmime::size_t genSize = msg->getGeneratedSize(ctx);
+		const vmime::size_t actualSize = msg->generate().length();
+
+		std::ostringstream oss;
+		oss << "estimated size (" << genSize << ") >= actual size (" << actualSize << ")";
+
+		VASSERT(oss.str(), genSize >= actualSize);
+	}
+
+VMIME_TEST_SUITE_END
+