Abseil Common Libraries (C++) (grcp 依赖)
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60 lines
1.9 KiB
60 lines
1.9 KiB
// Copyright 2020 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/string_constant.h" |
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#include "absl/meta/type_traits.h" |
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#include "gmock/gmock.h" |
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#include "gtest/gtest.h" |
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namespace { |
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using absl::strings_internal::MakeStringConstant; |
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struct Callable { |
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constexpr absl::string_view operator()() const { |
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return absl::string_view("Callable", 8); |
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} |
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}; |
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TEST(StringConstant, Traits) { |
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constexpr auto str = MakeStringConstant(Callable{}); |
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using T = decltype(str); |
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EXPECT_TRUE(std::is_empty<T>::value); |
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EXPECT_TRUE(std::is_trivial<T>::value); |
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EXPECT_TRUE(absl::is_trivially_default_constructible<T>::value); |
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EXPECT_TRUE(absl::is_trivially_copy_constructible<T>::value); |
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EXPECT_TRUE(absl::is_trivially_move_constructible<T>::value); |
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EXPECT_TRUE(absl::is_trivially_destructible<T>::value); |
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} |
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TEST(StringConstant, MakeFromCallable) { |
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constexpr auto str = MakeStringConstant(Callable{}); |
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using T = decltype(str); |
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EXPECT_EQ(Callable{}(), T::value); |
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EXPECT_EQ(Callable{}(), str()); |
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} |
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TEST(StringConstant, MakeFromStringConstant) { |
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// We want to make sure the StringConstant itself is a valid input to the |
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// factory function. |
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constexpr auto str = MakeStringConstant(Callable{}); |
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constexpr auto str2 = MakeStringConstant(str); |
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using T = decltype(str2); |
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EXPECT_EQ(Callable{}(), T::value); |
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EXPECT_EQ(Callable{}(), str2()); |
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} |
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} // namespace
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