// Copyright 2017 The Abseil Authors.
//
// 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.
#include "absl/strings/internal/utf8.h"
#include <cstdint>
#include <utility>
#include "gtest/gtest.h"
#include "absl/base/port.h"
namespace {
TEST(EncodeUTF8Char, BasicFunction) {
std::pair<char32_t, std::string> tests[] = {{0x0030, u8"\u0030"},
{0x00A3, u8"\u00A3"},
{0x00010000, u8"\U00010000"},
{0x0000FFFF, u8"\U0000FFFF"},
{0x0010FFFD, u8"\U0010FFFD"}};
for (auto &test : tests) {
char buf0[7] = {'\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00'};
char buf1[7] = {'\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF'};
char *buf0_written =
&buf0[absl::strings_internal::EncodeUTF8Char(buf0, test.first)];
char *buf1_written =
&buf1[absl::strings_internal::EncodeUTF8Char(buf1, test.first)];
int apparent_length = 7;
while (buf0[apparent_length - 1] == '\x00' &&
buf1[apparent_length - 1] == '\xFF') {
if (--apparent_length == 0) break;
}
EXPECT_EQ(apparent_length, buf0_written - buf0);
EXPECT_EQ(apparent_length, buf1_written - buf1);
EXPECT_EQ(apparent_length, test.second.length());
EXPECT_EQ(std::string(buf0, apparent_length), test.second);
EXPECT_EQ(std::string(buf1, apparent_length), test.second);
}
char buf[32] = "Don't Tread On Me";
EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf, 0x00110000),
absl::strings_internal::kMaxEncodedUTF8Size);
char buf2[32] = "Negative is invalid but sane";
EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf2, -1),
absl::strings_internal::kMaxEncodedUTF8Size);
}
} // namespace
