--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/3rdparty/vmime/tests/parser/wordEncoderTest.cpp	Tue Aug 17 11:19:54 2021 +0200
@@ -0,0 +1,129 @@
+//
+// 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"
+
+#include "vmime/wordEncoder.hpp"
+
+
+VMIME_TEST_SUITE_BEGIN(wordEncoderTest)
+
+	VMIME_TEST_LIST_BEGIN
+		VMIME_TEST(testGetNextChunk)
+		VMIME_TEST(testGetNextChunk_integral)
+		VMIME_TEST(testIsEncodingNeeded_ascii)
+		VMIME_TEST(testIsEncodingNeeded_withLanguage)
+		VMIME_TEST(testIsEncodingNeeded_specialChars)
+		VMIME_TEST(testGuessBestEncoding_QP)
+		VMIME_TEST(testGuessBestEncoding_B64)
+		VMIME_TEST(testEncodeQP_RFC2047)
+	VMIME_TEST_LIST_END
+
+
+	void testGetNextChunk()
+	{
+		// An integral number of characters should be encoded
+		vmime::wordEncoder we(
+			"bufferfoobarbaz",
+			vmime::charset("utf-8"),
+			vmime::wordEncoder::ENCODING_AUTO);
+
+		VASSERT_EQ("1", "buffer", we.getNextChunk(6));
+		VASSERT_EQ("2", "foo", we.getNextChunk(3));
+		VASSERT_EQ("3", "barbaz", we.getNextChunk(10));
+	}
+
+	void testGetNextChunk_integral()
+	{
+		// An integral number of characters should be encoded
+		vmime::wordEncoder we(
+			"buffer\xc3\xa0plop",
+			vmime::charset("utf-8"),
+			vmime::wordEncoder::ENCODING_AUTO);
+
+		VASSERT_EQ("1", "buffer=C3=A0", we.getNextChunk(7));
+		VASSERT_EQ("2", "plop", we.getNextChunk(10));
+	}
+
+	void testIsEncodingNeeded_ascii()
+	{
+		vmime::generationContext ctx(vmime::generationContext::getDefaultContext());
+		ctx.setInternationalizedEmailSupport(false);
+
+		VASSERT_FALSE("ascii", vmime::wordEncoder::isEncodingNeeded
+			(ctx, "ASCII-only buffer", vmime::charset("utf-8"), ""));
+
+		VASSERT_TRUE("non-ascii", vmime::wordEncoder::isEncodingNeeded
+			(ctx, "Buffer with some UTF-8 '\xc3\xa0'", vmime::charset("utf-8"), ""));
+	}
+
+	void testIsEncodingNeeded_withLanguage()
+	{
+		VASSERT_TRUE("ascii", vmime::wordEncoder::isEncodingNeeded
+			(vmime::generationContext::getDefaultContext(), "ASCII-only buffer", vmime::charset("utf-8"), "en"));
+	}
+
+	void testIsEncodingNeeded_specialChars()
+	{
+		VASSERT_TRUE("rfc2047", vmime::wordEncoder::isEncodingNeeded
+			(vmime::generationContext::getDefaultContext(),
+			 "foo bar =? foo bar", vmime::charset("us-ascii"), ""));
+
+		VASSERT_TRUE("new line 1", vmime::wordEncoder::isEncodingNeeded
+			(vmime::generationContext::getDefaultContext(),
+			 "foo bar \n foo bar", vmime::charset("us-ascii"), ""));
+
+		VASSERT_TRUE("new line 2", vmime::wordEncoder::isEncodingNeeded
+			(vmime::generationContext::getDefaultContext(),
+			 "foo bar \r foo bar", vmime::charset("us-ascii"), ""));
+	}
+
+	void testGuessBestEncoding_QP()
+	{
+		VASSERT_EQ("1", vmime::wordEncoder::ENCODING_QP,
+			vmime::wordEncoder::guessBestEncoding("ASCII only buffer", vmime::charset("us-ascii")));
+	}
+
+	void testGuessBestEncoding_B64()
+	{
+		// >= 40% non-ASCII => Base64...
+		VASSERT_EQ("1", vmime::wordEncoder::ENCODING_B64,
+			vmime::wordEncoder::guessBestEncoding("xxxxx\xc3\xa0\xc3\xa0", vmime::charset("utf-8")));
+
+		// ...else Quoted-Printable
+		VASSERT_EQ("2", vmime::wordEncoder::ENCODING_QP,
+			vmime::wordEncoder::guessBestEncoding("xxxxxx\xc3\xa0\xc3\xa0", vmime::charset("utf-8")));
+	}
+
+	void testEncodeQP_RFC2047()
+	{
+		// When Quoted-Printable is used, it should be RFC-2047 QP encoding
+		vmime::wordEncoder we(
+			"buffer\xc3\xa0 foo_bar",
+			vmime::charset("utf-8"),
+			vmime::wordEncoder::ENCODING_AUTO);
+
+		VASSERT_EQ("1", "buffer=C3=A0_foo=5Fbar", we.getNextChunk(100));
+	}
+
+VMIME_TEST_SUITE_END