conformance/fork_pipe_runner.h

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

#ifndef GOOGLE_PROTOBUF_CONFORMANCE_FORK_PIPE_RUNNER_H__
#define GOOGLE_PROTOBUF_CONFORMANCE_FORK_PIPE_RUNNER_H__

#include <cstddef>
#include <cstdint>
#include <string>
#include <vector>

#include "conformance/conformance.pb.h"
#include "test_runner.h"

namespace google {
namespace protobuf {

// Test runner that spawns the process being tested and communicates with it
// over a pipe.
class ForkPipeRunner : public ConformanceTestRunner {
 public:
  ForkPipeRunner(const std::string& executable,
                 const std::vector<std::string>& executable_args,
                 bool performance)
      : child_pid_(-1),
        executable_(executable),
        executable_args_(executable_args),
        performance_(performance) {}

  explicit ForkPipeRunner(const std::string& executable)
      : child_pid_(-1), executable_(executable) {}

  ~ForkPipeRunner() override = default;

  void RunTest(const std::string& test_name, uint32_t len,
               const std::string& request, std::string* response) override;

 private:
  void SpawnTestProgram();

  void CheckedWrite(int fd, const void* buf, size_t len);
  bool TryRead(int fd, void* buf, size_t len);
  void CheckedRead(int fd, void* buf, size_t len);

  int write_fd_;
  int read_fd_;
  pid_t child_pid_;
  std::string executable_;
  const std::vector<std::string> executable_args_;
  bool performance_;
  std::string current_test_name_;
};

}  // namespace protobuf
}  // namespace google

#endif  // GOOGLE_PROTOBUF_CONFORMANCE_FORK_PIPE_RUNNER_H__