| // Copyright 2023 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| #include "base/strings/utf_string_conversion_utils.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| TEST(UtfStringConversionUtilsTest, CountUnicodeCharacters) { |
| std::optional<size_t> count; |
| // The casts and u8 string literals are needed here so that we don't |
| // trigger linter errors about invalid ascii values. |
| {reinterpret_cast<const char*>(u8"abc\U0001F4A9"), 4, 4}, |
| {reinterpret_cast<const char*>(u8"\U0001F4A9"), 1, 1}, |
| {{1, static_cast<char>(-1)}, 5, std::nullopt}, |
| for (const auto& test_case : test_cases) { |
| EXPECT_EQ(CountUnicodeCharacters(test_case.value, test_case.limit), |