import subprocess
import signal
import os
import sys
import time
from multiprocessing import get_context


def target():
    time.sleep(99999)


def test():
    """
    Incorrect on all versions
    """
    proc = get_context("spawn").Process(target=target)
    proc.start()
    time.sleep(0.5)
    os.kill(proc.pid, signal.SIGINT)
    proc.join()
    # https://docs.python.org/3/library/multiprocessing.html#multiprocessing.Process.exitcode
    # The child’s exit code. This will be None if the process has not yet
    # terminated. A negative value -N indicates that the child was terminated
    # by signal N
    print(f"proc.exitcode={proc.exitcode!r}") # Killed with 2, should be -2


def test_popen():
    """
    Incorrect on <3.7, fixed in version 3.8+
    """
    proc = subprocess.Popen([sys.executable, "-m", __spec__.name, "target"])
    time.sleep(0.5)
    proc.send_signal(signal.SIGINT)
    print(f"proc.wait()={proc.wait()!r}") # Killed with 2, should be -2


def main():
    if sys.argv[-1] == "target":
        return target()

    test_popen()
    test()
    return 0


if __name__ == "__main__":
    sys.exit(main())