| // |
| // Copyright 2018 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. |
| // |
| |
| #ifndef ABSL_STRINGS_CORD_TEST_HELPERS_H_ |
| #define ABSL_STRINGS_CORD_TEST_HELPERS_H_ |
| |
| #include "absl/strings/cord.h" |
| |
| namespace absl { |
| ABSL_NAMESPACE_BEGIN |
| |
| // Creates a multi-segment Cord from an iterable container of strings. The |
| // resulting Cord is guaranteed to have one segment for every string in the |
| // container. This allows code to be unit tested with multi-segment Cord |
| // inputs. |
| // |
| // Example: |
| // |
| // absl::Cord c = absl::MakeFragmentedCord({"A ", "fragmented ", "Cord"}); |
| // EXPECT_FALSE(c.GetFlat(&unused)); |
| // |
| // The mechanism by which this Cord is created is an implementation detail. Any |
| // implementation that produces a multi-segment Cord may produce a flat Cord in |
| // the future as new optimizations are added to the Cord class. |
| // MakeFragmentedCord will, however, always be updated to return a multi-segment |
| // Cord. |
| template <typename Container> |
| Cord MakeFragmentedCord(const Container& c) { |
| Cord result; |
| for (const auto& s : c) { |
| auto* external = new std::string(s); |
| Cord tmp = absl::MakeCordFromExternal( |
| *external, [external](absl::string_view) { delete external; }); |
| tmp.Prepend(result); |
| result = tmp; |
| } |
| return result; |
| } |
| |
| inline Cord MakeFragmentedCord(std::initializer_list<absl::string_view> list) { |
| return MakeFragmentedCord<std::initializer_list<absl::string_view>>(list); |
| } |
| |
| ABSL_NAMESPACE_END |
| } // namespace absl |
| |
| #endif // ABSL_STRINGS_CORD_TEST_HELPERS_H_ |