rspamd/src/libmime/mime_string.cxx

/*-
 * Copyright 2021 Vsevolod Stakhov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define DOCTEST_CONFIG_IMPLEMENTATION_IN_DLL
#include "doctest/doctest.h"
#include "mime_string.hxx"
#include "unicode/uchar.h"

TEST_SUITE("mime_string")
{
	using namespace rspamd::mime;
	TEST_CASE("mime_string unfiltered ctors")
	{
		SUBCASE("empty")
		{
			mime_string st;
			CHECK(st.size() == 0);
			CHECK(st == "");
		}
		SUBCASE("unfiltered valid")
		{
			mime_string st{std::string_view("abcd")};
			CHECK(st == "abcd");
		}
		SUBCASE("unfiltered zero character")
		{
			mime_string st{"abc\0d", 5};
			CHECK(st.has_zeroes());
			CHECK(st == "abcd");
		}
		SUBCASE("unfiltered invalid character - middle")
		{
			mime_string st{std::string("abc\234d")};
			CHECK(st.has_invalid());
			CHECK(st == "abc\uFFFDd");
		}
		SUBCASE("unfiltered invalid character - end")
		{
			mime_string st{std::string("abc\234")};
			CHECK(st.has_invalid());
			CHECK(st == "abc\uFFFD");
		}
		SUBCASE("unfiltered invalid character - start")
		{
			mime_string st{std::string("\234abc")};
			CHECK(st.has_invalid());
			CHECK(st == "\uFFFDabc");
		}
	}

	TEST_CASE("mime_string filtered ctors")
	{
		auto print_filter = [](UChar32 inp) -> UChar32 {
			if (!u_isprint(inp)) {
				return 0;
			}

			return inp;
		};

		auto tolower_filter = [](UChar32 inp) -> UChar32 {
			return u_tolower(inp);
		};

		SUBCASE("empty")
		{
			mime_string st{std::string_view(""), tolower_filter};
			CHECK(st.size() == 0);
			CHECK(st == "");
		}
		SUBCASE("filtered valid")
		{
			mime_string st{std::string("AbCdУ"), tolower_filter};
			CHECK(st == "abcdу");
		}
		SUBCASE("filtered invalid + filtered")
		{
			mime_string st{std::string("abcd\234\1"), print_filter};
			CHECK(st == "abcd\uFFFD");
		}
	}
	TEST_CASE("mime_string assign")
	{
		SUBCASE("assign from valid")
		{
			mime_string st;

			CHECK(st.assign_if_valid(std::string("test")));
			CHECK(st == "test");
		}
		SUBCASE("assign from invalid")
		{
			mime_string st;

			CHECK(!st.assign_if_valid(std::string("test\234t")));
			CHECK(st == "");
		}
	}

	TEST_CASE("mime_string iterators")
	{

		SUBCASE("unfiltered iterator ascii")
		{
			auto in = std::string("abcd");
			mime_string st{in};
			CHECK(st == "abcd");

			int i = 0;
			for (auto &&c: st) {
				CHECK(c == in[i++]);
			}
		}

		SUBCASE("unfiltered iterator utf8")
		{
			auto in = std::string("тест");
			UChar32 ucs[4] = {1090, 1077, 1089, 1090};
			mime_string st{in};
			CHECK(st == "тест");

			int i = 0;
			for (auto &&c: st) {
				CHECK(c == ucs[i++]);
			}
			CHECK(i == sizeof(ucs) / sizeof(ucs[0]));
		}

		SUBCASE("unfiltered raw iterator ascii")
		{
			auto in = std::string("abcd");
			mime_string st{in};
			CHECK(st == "abcd");

			int i = 0;
			for (auto it = st.raw_begin(); it != st.raw_end(); ++it) {
				CHECK(*it == in[i++]);
			}
		}

		SUBCASE("unfiltered raw iterator utf8")
		{
			auto in = std::string("тест");
			mime_string st{in};
			CHECK(st == "тест");

			int i = 0;
			for (auto it = st.raw_begin(); it != st.raw_end(); ++it) {
				CHECK(*it == in[i++]);
			}
			CHECK(i == in.size());
		}
	}
}