| // Copyright 2017 Google LLC |
| // |
| // 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 |
| // |
| // http://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. |
| |
| // Implements a fake filesystem, useful for tests. |
| #ifndef CPU_FEATURES_TEST_FILESYSTEM_FOR_TESTING_H_ |
| #define CPU_FEATURES_TEST_FILESYSTEM_FOR_TESTING_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <unordered_map> |
| |
| #include "internal/filesystem.h" |
| |
| namespace cpu_features { |
| |
| class FakeFile { |
| public: |
| explicit FakeFile(int file_descriptor, const char* content); |
| ~FakeFile(); |
| |
| void Open(); |
| void Close(); |
| int Read(int fd, void* buf, size_t count); |
| |
| int GetFileDescriptor() const { return file_descriptor_; } |
| |
| private: |
| const int file_descriptor_; |
| const std::string content_; |
| bool opened_ = false; |
| size_t head_index_ = 0; |
| }; |
| |
| class FakeFilesystem { |
| public: |
| void Reset(); |
| FakeFile* CreateFile(const std::string& filename, const char* content); |
| FakeFile* FindFileOrDie(const int file_descriptor) const; |
| FakeFile* FindFileOrNull(const std::string& filename) const; |
| |
| private: |
| int next_file_descriptor_ = 0; |
| std::unordered_map<std::string, std::unique_ptr<FakeFile>> files_; |
| }; |
| |
| FakeFilesystem& GetEmptyFilesystem(); |
| |
| } // namespace cpu_features |
| |
| #endif // CPU_FEATURES_TEST_FILESYSTEM_FOR_TESTING_H_ |