_exit_test.py

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"""Tests clean exit of server/client on Python Interpreter exit/sigint.

The tests in this module spawn a subprocess for each test case, the
test is considered successful if it doesn't hang/timeout.
"""

import atexit
import os
import signal
import six
import subprocess
import sys
import threading
import time
import unittest

from tests.unit import _exit_scenarios

SCENARIO_FILE = os.path.abspath(os.path.join(
    os.path.dirname(os.path.realpath(__file__)), '_exit_scenarios.py'))
INTERPRETER = sys.executable
BASE_COMMAND = [INTERPRETER, SCENARIO_FILE]
BASE_SIGTERM_COMMAND = BASE_COMMAND + ['--wait_for_interrupt']

INIT_TIME = 1.0


processes = []
process_lock = threading.Lock()


# Make sure we attempt to clean up any
# processes we may have left running
def cleanup_processes():
  with process_lock:
    for process in processes:
      try:
        process.kill()
      except Exception:
        pass
atexit.register(cleanup_processes)


def interrupt_and_wait(process):
  with process_lock:
    processes.append(process)
  time.sleep(INIT_TIME)
  os.kill(process.pid, signal.SIGINT)
  process.wait()


def wait(process):
  with process_lock:
    processes.append(process)
  process.wait()


@unittest.skip('https://github.com/grpc/grpc/issues/7311')
class ExitTest(unittest.TestCase):

  def test_unstarted_server(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.UNSTARTED_SERVER],
        stdout=sys.stdout, stderr=sys.stderr)
    wait(process)

  def test_unstarted_server_terminate(self):
    process = subprocess.Popen(
        BASE_SIGTERM_COMMAND + [_exit_scenarios.UNSTARTED_SERVER],
        stdout=sys.stdout)
    interrupt_and_wait(process)

  def test_running_server(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.RUNNING_SERVER],
        stdout=sys.stdout, stderr=sys.stderr)
    wait(process)

  def test_running_server_terminate(self):
    process = subprocess.Popen(
        BASE_SIGTERM_COMMAND + [_exit_scenarios.RUNNING_SERVER],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  def test_poll_connectivity_no_server(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY_NO_SERVER],
        stdout=sys.stdout, stderr=sys.stderr)
    wait(process)

  def test_poll_connectivity_no_server_terminate(self):
    process = subprocess.Popen(
        BASE_SIGTERM_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY_NO_SERVER],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  def test_poll_connectivity(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY],
        stdout=sys.stdout, stderr=sys.stderr)
    wait(process)

  def test_poll_connectivity_terminate(self):
    process = subprocess.Popen(
        BASE_SIGTERM_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  def test_in_flight_unary_unary_call(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_UNARY_UNARY_CALL],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
  def test_in_flight_unary_stream_call(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_UNARY_STREAM_CALL],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  def test_in_flight_stream_unary_call(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_STREAM_UNARY_CALL],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
  def test_in_flight_stream_stream_call(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_STREAM_STREAM_CALL],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
  def test_in_flight_partial_unary_stream_call(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_PARTIAL_UNARY_STREAM_CALL],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  def test_in_flight_partial_stream_unary_call(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_PARTIAL_STREAM_UNARY_CALL],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)

  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
  def test_in_flight_partial_stream_stream_call(self):
    process = subprocess.Popen(
        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_PARTIAL_STREAM_STREAM_CALL],
        stdout=sys.stdout, stderr=sys.stderr)
    interrupt_and_wait(process)


if __name__ == '__main__':
  unittest.main(verbosity=2)