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