utf8_test.cc (2582B)
1 // Copyright 2017 The Abseil Authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "absl/strings/internal/utf8.h" 16 17 #include <cstdint> 18 #include <utility> 19 20 #include "gtest/gtest.h" 21 #include "absl/base/port.h" 22 23 namespace { 24 25 #if !defined(__cpp_char8_t) 26 #if defined(__clang__) 27 #pragma clang diagnostic push 28 #pragma clang diagnostic ignored "-Wc++2a-compat" 29 #endif 30 TEST(EncodeUTF8Char, BasicFunction) { 31 std::pair<char32_t, std::string> tests[] = {{0x0030, u8"\u0030"}, 32 {0x00A3, u8"\u00A3"}, 33 {0x00010000, u8"\U00010000"}, 34 {0x0000FFFF, u8"\U0000FFFF"}, 35 {0x0010FFFD, u8"\U0010FFFD"}}; 36 for (auto &test : tests) { 37 char buf0[7] = {'\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00'}; 38 char buf1[7] = {'\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF'}; 39 char *buf0_written = 40 &buf0[absl::strings_internal::EncodeUTF8Char(buf0, test.first)]; 41 char *buf1_written = 42 &buf1[absl::strings_internal::EncodeUTF8Char(buf1, test.first)]; 43 int apparent_length = 7; 44 while (buf0[apparent_length - 1] == '\x00' && 45 buf1[apparent_length - 1] == '\xFF') { 46 if (--apparent_length == 0) break; 47 } 48 EXPECT_EQ(apparent_length, buf0_written - buf0); 49 EXPECT_EQ(apparent_length, buf1_written - buf1); 50 EXPECT_EQ(apparent_length, test.second.length()); 51 EXPECT_EQ(std::string(buf0, apparent_length), test.second); 52 EXPECT_EQ(std::string(buf1, apparent_length), test.second); 53 } 54 char buf[32] = "Don't Tread On Me"; 55 EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf, 0x00110000), 56 absl::strings_internal::kMaxEncodedUTF8Size); 57 char buf2[32] = "Negative is invalid but sane"; 58 EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf2, -1), 59 absl::strings_internal::kMaxEncodedUTF8Size); 60 } 61 #if defined(__clang__) 62 #pragma clang diagnostic pop 63 #endif 64 #endif // !defined(__cpp_char8_t) 65 66 } // namespace