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// 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_
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