(self)
| 372 | self.loop.run_until_complete(proc.wait()) |
| 373 | |
| 374 | def test_pause_reading(self): |
| 375 | limit = 10 |
| 376 | size = (limit * 2 + 1) |
| 377 | |
| 378 | async def test_pause_reading(): |
| 379 | code = '\n'.join(( |
| 380 | 'import sys', |
| 381 | 'sys.stdout.write("x" * %s)' % size, |
| 382 | 'sys.stdout.flush()', |
| 383 | )) |
| 384 | |
| 385 | connect_read_pipe = self.loop.connect_read_pipe |
| 386 | |
| 387 | async def connect_read_pipe_mock(*args, **kw): |
| 388 | transport, protocol = await connect_read_pipe(*args, **kw) |
| 389 | transport.pause_reading = mock.Mock() |
| 390 | transport.resume_reading = mock.Mock() |
| 391 | return (transport, protocol) |
| 392 | |
| 393 | self.loop.connect_read_pipe = connect_read_pipe_mock |
| 394 | |
| 395 | proc = await asyncio.create_subprocess_exec( |
| 396 | sys.executable, '-c', code, |
| 397 | stdin=asyncio.subprocess.PIPE, |
| 398 | stdout=asyncio.subprocess.PIPE, |
| 399 | limit=limit, |
| 400 | ) |
| 401 | stdout_transport = proc._transport.get_pipe_transport(1) |
| 402 | |
| 403 | stdout, stderr = await proc.communicate() |
| 404 | |
| 405 | # The child process produced more than limit bytes of output, |
| 406 | # the stream reader transport should pause the protocol to not |
| 407 | # allocate too much memory. |
| 408 | return (stdout, stdout_transport) |
| 409 | |
| 410 | # Issue #22685: Ensure that the stream reader pauses the protocol |
| 411 | # when the child process produces too much data |
| 412 | stdout, transport = self.loop.run_until_complete(test_pause_reading()) |
| 413 | |
| 414 | self.assertEqual(stdout, b'x' * size) |
| 415 | self.assertTrue(transport.pause_reading.called) |
| 416 | self.assertTrue(transport.resume_reading.called) |
| 417 | |
| 418 | def test_stdin_not_inheritable(self): |
| 419 | # asyncio issue #209: stdin must not be inheritable, otherwise |
nothing calls this directly
no test coverage detected