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#include "ipc/process_watch_dog.h"

#include <cstdint>

#include "base/clock.h"
#include "base/logging.h"
#include "base/port.h"
#include "base/util.h"
#include "testing/base/public/gunit.h"

namespace mozc {
namespace {
uint64_t g_current_time = 0;
}

class TestProcessWatchDog : public ProcessWatchDog {
 public:
  void Signaled(ProcessWatchDog::SignalType type) override {
    EXPECT_EQ(type, ProcessWatchDog::PROCESS_SIGNALED);
    const uint64_t diff = Clock::GetTime() - g_current_time;
    EXPECT_EQ(2, diff);  // allow 1-sec error
  }
};

TEST(ProcessWatchDog, ProcessWatchDogTest) {
  g_current_time = Clock::GetTime();

#ifndef OS_WIN
  // revoke myself with different parameter
  pid_t pid = fork();
  if (pid == 0) {
    // Child;
    Util::Sleep(2000);
    exit(0);
  } else if (pid > 0) {
    TestProcessWatchDog dog;
    dog.StartWatchDog();
    dog.SetID(static_cast<ProcessWatchDog::ProcessID>(pid),
              ProcessWatchDog::UnknownThreadID, -1);
    Util::Sleep(4000);
    dog.StopWatchDog();
  } else {
    LOG(ERROR) << "cannot execute fork";
  }
#endif
}
}  // namespace mozc
