66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/strings/internal/utf8.h"
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#include <cstdint>
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#include <utility>
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#include "gtest/gtest.h"
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#include "absl/base/port.h"
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namespace {
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#if !defined(__cpp_char8_t)
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#if defined(__clang__)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wc++2a-compat"
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#endif
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TEST(EncodeUTF8Char, BasicFunction) {
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std::pair<char32_t, std::string> tests[] = {{0x0030, u8"\u0030"},
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{0x00A3, u8"\u00A3"},
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{0x00010000, u8"\U00010000"},
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{0x0000FFFF, u8"\U0000FFFF"},
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{0x0010FFFD, u8"\U0010FFFD"}};
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for (auto &test : tests) {
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char buf0[7] = {'\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00'};
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char buf1[7] = {'\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF'};
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char *buf0_written =
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&buf0[absl::strings_internal::EncodeUTF8Char(buf0, test.first)];
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char *buf1_written =
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&buf1[absl::strings_internal::EncodeUTF8Char(buf1, test.first)];
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int apparent_length = 7;
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while (buf0[apparent_length - 1] == '\x00' &&
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buf1[apparent_length - 1] == '\xFF') {
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if (--apparent_length == 0) break;
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}
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EXPECT_EQ(apparent_length, buf0_written - buf0);
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EXPECT_EQ(apparent_length, buf1_written - buf1);
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EXPECT_EQ(apparent_length, test.second.length());
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EXPECT_EQ(std::string(buf0, apparent_length), test.second);
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EXPECT_EQ(std::string(buf1, apparent_length), test.second);
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}
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char buf[32] = "Don't Tread On Me";
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EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf, 0x00110000),
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absl::strings_internal::kMaxEncodedUTF8Size);
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char buf2[32] = "Negative is invalid but sane";
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EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf2, -1),
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absl::strings_internal::kMaxEncodedUTF8Size);
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}
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#if defined(__clang__)
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#pragma clang diagnostic pop
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#endif
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#endif // !defined(__cpp_char8_t)
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} // namespace
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