has_absl_stringify_test.cc (1303B)
1 // Copyright 2023 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/has_absl_stringify.h" 16 17 #include <string> 18 19 #include "gtest/gtest.h" 20 #include "absl/types/optional.h" 21 22 namespace { 23 24 struct TypeWithoutAbslStringify {}; 25 26 struct TypeWithAbslStringify { 27 template <typename Sink> 28 friend void AbslStringify(Sink&, const TypeWithAbslStringify&) {} 29 }; 30 31 TEST(HasAbslStringifyTest, Works) { 32 EXPECT_FALSE(absl::HasAbslStringify<int>::value); 33 EXPECT_FALSE(absl::HasAbslStringify<std::string>::value); 34 EXPECT_FALSE(absl::HasAbslStringify<TypeWithoutAbslStringify>::value); 35 EXPECT_TRUE(absl::HasAbslStringify<TypeWithAbslStringify>::value); 36 EXPECT_FALSE( 37 absl::HasAbslStringify<absl::optional<TypeWithAbslStringify>>::value); 38 } 39 40 } // namespace