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// Copyright 2023 The Abseil Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/strings/has_absl_stringify.h"
#include <string>
#include "gtest/gtest.h"
#include "absl/types/optional.h"
namespace {
struct TypeWithoutAbslStringify {};
struct TypeWithAbslStringify {
template <typename Sink>
friend void AbslStringify(Sink&, const TypeWithAbslStringify&) {}
};
TEST(HasAbslStringifyTest, Works) {
EXPECT_FALSE(absl::HasAbslStringify<int>::value);
EXPECT_FALSE(absl::HasAbslStringify<std::string>::value);
EXPECT_FALSE(absl::HasAbslStringify<TypeWithoutAbslStringify>::value);
EXPECT_TRUE(absl::HasAbslStringify<TypeWithAbslStringify>::value);
EXPECT_FALSE(
absl::HasAbslStringify<absl::optional<TypeWithAbslStringify>>::value);
}
} // namespace
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