vmime/tests/parser/wordEncoderTest.cpp

//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002 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(testGuessBestEncoding_size)
		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 testGuessBestEncoding_size() {

		std::string i(42949673, 'a');
		auto enc = vmime::wordEncoder::guessBestEncoding(i, vmime::charset("utf-8"));
		VASSERT_EQ("1", enc, vmime::wordEncoder::ENCODING_QP);

	}

	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