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GeezerVison is showing github.com — asyncio/tests/test_subprocess.py at master · python/asyncio
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Expand file tree/ Copy pathtest_subprocess.pyMore file actions 501 lines (408 loc) · 18.7 KB / Copy pathtest_subprocess.pyFile metadata and controls501 lines (408 loc) · 18.7 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 import signal import sys import unittest import warnings from unittest import mock import asyncio from asyncio import base_subprocess from asyncio import subprocess from asyncio import test_utils try: from test import support except ImportError: from asyncio import test_support as support if sys.platform != 'win32': from asyncio import unix_events # Program blocking PROGRAM_BLOCKED = [sys.executable, '-c', 'import time; time.sleep(3600)'] # Program copying input to output PROGRAM_CAT = [ sys.executable, '-c', ';'.join(('import sys', 'data = sys.stdin.buffer.read()', 'sys.stdout.buffer.write(data)'))] class TestSubprocessTransport(base_subprocess.BaseSubprocessTransport): def _start(self, *args, **kwargs): self._proc = mock.Mock() self._proc.stdin = None self._proc.stdout = None self._proc.stderr = None class SubprocessTransportTests(test_utils.TestCase): def setUp(self): super().setUp() self.loop = self.new_test_loop() self.set_event_loop(self.loop) def create_transport(self, waiter=None): protocol = mock.Mock() protocol.connection_made._is_coroutine = False protocol.process_exited._is_coroutine = False transport = TestSubprocessTransport( self.loop, protocol, ['test'], False, None, None, None, 0, waiter=waiter) return (transport, protocol) def test_proc_exited(self): waiter = asyncio.Future(loop=self.loop) transport, protocol = self.create_transport(waiter) transport._process_exited(6) self.loop.run_until_complete(waiter) self.assertEqual(transport.get_returncode(), 6) self.assertTrue(protocol.connection_made.called) self.assertTrue(protocol.process_exited.called) self.assertTrue(protocol.connection_lost.called) self.assertEqual(protocol.connection_lost.call_args[0], (None,)) self.assertFalse(transport.is_closing()) self.assertIsNone(transport._loop) self.assertIsNone(transport._proc) self.assertIsNone(transport._protocol) # methods must raise ProcessLookupError if the process exited self.assertRaises(ProcessLookupError, transport.send_signal, signal.SIGTERM) self.assertRaises(ProcessLookupError, transport.terminate) self.assertRaises(ProcessLookupError, transport.kill) transport.close() class SubprocessMixin: def test_stdin_stdout(self): args = PROGRAM_CAT @asyncio.coroutine def run(data): proc = yield from asyncio.create_subprocess_exec( *args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, loop=self.loop) # feed data proc.stdin.write(data) yield from proc.stdin.drain() proc.stdin.close() # get output and exitcode data = yield from proc.stdout.read() exitcode = yield from proc.wait() return (exitcode, data) task = run(b'some data') task = asyncio.wait_for(task, 60.0, loop=self.loop) exitcode, stdout = self.loop.run_until_complete(task) self.assertEqual(exitcode, 0) self.assertEqual(stdout, b'some data') def test_communicate(self): args = PROGRAM_CAT @asyncio.coroutine def run(data): proc = yield from asyncio.create_subprocess_exec( *args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, loop=self.loop) stdout, stderr = yield from proc.communicate(data) return proc.returncode, stdout task = run(b'some data') task = asyncio.wait_for(task, 60.0, loop=self.loop) exitcode, stdout = self.loop.run_until_complete(task) self.assertEqual(exitcode, 0) self.assertEqual(stdout, b'some data') def test_shell(self): create = asyncio.create_subprocess_shell('exit 7', loop=self.loop) proc = self.loop.run_until_complete(create) exitcode = self.loop.run_until_complete(proc.wait()) self.assertEqual(exitcode, 7) def test_start_new_session(self): # start the new process in a new session create = asyncio.create_subprocess_shell('exit 8', start_new_session=True, loop=self.loop) proc = self.loop.run_until_complete(create) exitcode = self.loop.run_until_complete(proc.wait()) self.assertEqual(exitcode, 8) def test_kill(self): args = PROGRAM_BLOCKED create = asyncio.create_subprocess_exec(*args, loop=self.loop) proc = self.loop.run_until_complete(create) proc.kill() returncode = self.loop.run_until_complete(proc.wait()) if sys.platform == 'win32': self.assertIsInstance(returncode, int) # expect 1 but sometimes get 0 else: self.assertEqual(-signal.SIGKILL, returncode) def test_terminate(self): args = PROGRAM_BLOCKED create = asyncio.create_subprocess_exec(*args, loop=self.loop) proc = self.loop.run_until_complete(create) proc.terminate() returncode = self.loop.run_until_complete(proc.wait()) if sys.platform == 'win32': self.assertIsInstance(returncode, int) # expect 1 but sometimes get 0 else: self.assertEqual(-signal.SIGTERM, returncode) @unittest.skipIf(sys.platform == 'win32', "Don't have SIGHUP") def test_send_signal(self): code = 'import time; print("sleeping", flush=True); time.sleep(3600)' args = [sys.executable, '-c', code] create = asyncio.create_subprocess_exec(*args, stdout=subprocess.PIPE, loop=self.loop) proc = self.loop.run_until_complete(create) @asyncio.coroutine def send_signal(proc): # basic synchronization to wait until the program is sleeping line = yield from proc.stdout.readline() self.assertEqual(line, b'sleeping\n') proc.send_signal(signal.SIGHUP) returncode = (yield from proc.wait()) return returncode returncode = self.loop.run_until_complete(send_signal(proc)) self.assertEqual(-signal.SIGHUP, returncode) def prepare_broken_pipe_test(self): # buffer large enough to feed the whole pipe buffer large_data = b'x' * support.PIPE_MAX_SIZE # the program ends before the stdin can be feeded create = asyncio.create_subprocess_exec( sys.executable, '-c', 'pass', stdin=subprocess.PIPE, loop=self.loop) proc = self.loop.run_until_complete(create) return (proc, large_data) def test_stdin_broken_pipe(self): proc, large_data = self.prepare_broken_pipe_test() @asyncio.coroutine def write_stdin(proc, data): proc.stdin.write(data) yield from proc.stdin.drain() coro = write_stdin(proc, large_data) # drain() must raise BrokenPipeError or ConnectionResetError with test_utils.disable_logger(): self.assertRaises((BrokenPipeError, ConnectionResetError), self.loop.run_until_complete, coro) self.loop.run_until_complete(proc.wait()) def test_communicate_ignore_broken_pipe(self): proc, large_data = self.prepare_broken_pipe_test() # communicate() must ignore BrokenPipeError when feeding stdin with test_utils.disable_logger(): self.loop.run_until_complete(proc.communicate(large_data)) self.loop.run_until_complete(proc.wait()) def test_pause_reading(self): limit = 10 size = (limit * 2 + 1) @asyncio.coroutine def test_pause_reading(): code = '\n'.join(( 'import sys', 'sys.stdout.write("x" * %s)' % size, 'sys.stdout.flush()', )) connect_read_pipe = self.loop.connect_read_pipe @asyncio.coroutine def connect_read_pipe_mock(*args, **kw): transport, protocol = yield from connect_read_pipe(*args, **kw) transport.pause_reading = mock.Mock() transport.resume_reading = mock.Mock() return (transport, protocol) self.loop.connect_read_pipe = connect_read_pipe_mock proc = yield from asyncio.create_subprocess_exec( sys.executable, '-c', code, stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE, limit=limit, loop=self.loop) stdout_transport = proc._transport.get_pipe_transport(1) stdout, stderr = yield from proc.communicate() # The child process produced more than limit bytes of output, # the stream reader transport should pause the protocol to not # allocate too much memory. return (stdout, stdout_transport) # Issue #22685: Ensure that the stream reader pauses the protocol # when the child process produces too much data stdout, transport = self.loop.run_until_complete(test_pause_reading()) self.assertEqual(stdout, b'x' * size) self.assertTrue(transport.pause_reading.called) self.assertTrue(transport.resume_reading.called) def test_stdin_not_inheritable(self): # asyncio issue #209: stdin must not be inheritable, otherwise # the Process.communicate() hangs @asyncio.coroutine def len_message(message): code = 'import sys; data = sys.stdin.read(); print(len(data))' proc = yield from asyncio.create_subprocess_exec( sys.executable, '-c', code, stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE, close_fds=False, loop=self.loop) stdout, stderr = yield from proc.communicate(message) exitcode = yield from proc.wait() return (stdout, exitcode) output, exitcode = self.loop.run_until_complete(len_message(b'abc')) self.assertEqual(output.rstrip(), b'3') self.assertEqual(exitcode, 0) def test_empty_input(self): @asyncio.coroutine def empty_input(): code = 'import sys; data = sys.stdin.read(); print(len(data))' proc = yield from asyncio.create_subprocess_exec( sys.executable, '-c', code, stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE, close_fds=False, loop=self.loop) stdout, stderr = yield from proc.communicate(b'') exitcode = yield from proc.wait() return (stdout, exitcode) output, exitcode = self.loop.run_until_complete(empty_input()) self.assertEqual(output.rstrip(), b'0') self.assertEqual(exitcode, 0) def test_cancel_process_wait(self): # Issue #23140: cancel Process.wait() @asyncio.coroutine def cancel_wait(): proc = yield from asyncio.create_subprocess_exec( *PROGRAM_BLOCKED, loop=self.loop) # Create an internal future waiting on the process exit task = self.loop.create_task(proc.wait()) self.loop.call_soon(task.cancel) try: yield from task except asyncio.CancelledError: pass # Cancel the future task.cancel() # Kill the process and wait until it is done proc.kill() yield from proc.wait() self.loop.run_until_complete(cancel_wait()) def test_cancel_make_subprocess_transport_exec(self): @asyncio.coroutine def cancel_make_transport(): coro = asyncio.create_subprocess_exec(*PROGRAM_BLOCKED, loop=self.loop) task = self.loop.create_task(coro) self.loop.call_soon(task.cancel) try: yield from task except asyncio.CancelledError: pass # ignore the log: # "Exception during subprocess creation, kill the subprocess" with test_utils.disable_logger(): self.loop.run_until_complete(cancel_make_transport()) def test_cancel_post_init(self): @asyncio.coroutine def cancel_make_transport(): coro = self.loop.subprocess_exec(asyncio.SubprocessProtocol, *PROGRAM_BLOCKED) task = self.loop.create_task(coro) self.loop.call_soon(task.cancel) try: yield from task except asyncio.CancelledError: pass # ignore the log: # "Exception during subprocess creation, kill the subprocess" with test_utils.disable_logger(): self.loop.run_until_complete(cancel_make_transport()) test_utils.run_briefly(self.loop) def test_close_kill_running(self): @asyncio.coroutine def kill_running(): create = self.loop.subprocess_exec(asyncio.SubprocessProtocol, *PROGRAM_BLOCKED) transport, protocol = yield from create kill_called = False def kill(): nonlocal kill_called kill_called = True orig_kill() proc = transport.get_extra_info('subprocess') orig_kill = proc.kill proc.kill = kill returncode = transport.get_returncode() transport.close() yield from transport._wait() return (returncode, kill_called) # Ignore "Close running child process: kill ..." log with test_utils.disable_logger(): returncode, killed = self.loop.run_until_complete(kill_running()) self.assertIsNone(returncode) # transport.close() must kill the process if it is still running self.assertTrue(killed) test_utils.run_briefly(self.loop) def test_close_dont_kill_finished(self): @asyncio.coroutine def kill_running(): create = self.loop.subprocess_exec(asyncio.SubprocessProtocol, *PROGRAM_BLOCKED) transport, protocol = yield from create proc = transport.get_extra_info('subprocess') # kill the process (but asyncio is not notified immediately) proc.kill() proc.wait() proc.kill = mock.Mock() proc_returncode = proc.poll() transport_returncode = transport.get_returncode() transport.close() return (proc_returncode, transport_returncode, proc.kill.called) # Ignore "Unknown child process pid ..." log of SafeChildWatcher, # emitted because the test already consumes the exit status: # proc.wait() with test_utils.disable_logger(): result = self.loop.run_until_complete(kill_running()) test_utils.run_briefly(self.loop) proc_returncode, transport_return_code, killed = result self.assertIsNotNone(proc_returncode) self.assertIsNone(transport_return_code) # transport.close() must not kill the process if it finished, even if # the transport was not notified yet self.assertFalse(killed) # Unlike SafeChildWatcher, FastChildWatcher does not pop the # callbacks if waitpid() is called elsewhere. Let's clear them # manually to avoid a warning when the watcher is detached. if sys.platform != 'win32' and \ isinstance(self, SubprocessFastWatcherTests): asyncio.get_child_watcher()._callbacks.clear() def test_popen_error(self): # Issue #24763: check that the subprocess transport is closed # when BaseSubprocessTransport fails if sys.platform == 'win32': target = 'asyncio.windows_utils.Popen' else: target = 'subprocess.Popen' with mock.patch(target) as popen: exc = ZeroDivisionError popen.side_effect = exc create = asyncio.create_subprocess_exec(sys.executable, '-c', 'pass', loop=self.loop) with warnings.catch_warnings(record=True) as warns: with self.assertRaises(exc): self.loop.run_until_complete(create) self.assertEqual(warns, []) if sys.platform != 'win32': # Unix class SubprocessWatcherMixin(SubprocessMixin): Watcher = None def setUp(self): super().setUp() policy = asyncio.get_event_loop_policy() self.loop = policy.new_event_loop() self.set_event_loop(self.loop) watcher = self.Watcher() watcher.attach_loop(self.loop) policy.set_child_watcher(watcher) self.addCleanup(policy.set_child_watcher, None) class SubprocessSafeWatcherTests(SubprocessWatcherMixin, test_utils.TestCase): Watcher = unix_events.SafeChildWatcher class SubprocessFastWatcherTests(SubprocessWatcherMixin, test_utils.TestCase): Watcher = unix_events.FastChildWatcher else: # Windows class SubprocessProactorTests(SubprocessMixin, test_utils.TestCase): def setUp(self): super().setUp() self.loop = asyncio.ProactorEventLoop() self.set_event_loop(self.loop) if __name__ == '__main__': unittest.main() |
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