comparison tests/test-stdio.py @ 45096:e9e452eafbfb

tests: add tests for when stdout or stderr is connected to `os.devnull`

The original motivation was that creating PTYs on Windows is not possible, but
`NUL` is recognized as a TTY, so we can have at least some test coverage for
the TTY case. I think it doesn’t hurt to run the test cases on all systems.

45095:8e04607023e5

        for fd in fds:
            try:
                os.close(fd)
            except EnvironmentError:
                pass


@contextlib.contextmanager
def _pipes():
    rwpair = os.pipe()

                stdout=child_stream if stream == 'stdout' else None,
                stderr=child_stream if stream == 'stderr' else None,
            )
            try:
                os.close(child_stream)
                check_output(stream_receiver, proc)
            except:  # re-raises
                proc.terminate()
                raise
            finally:
                retcode = proc.wait()

            rwpair_generator,
            check_output,
            python_args,
        )

    def test_buffering_stdout_pipes(self):
        self._test_buffering('stdout', _pipes, FULLY_BUFFERED)

    def test_buffering_stdout_ptys(self):
        self._test_buffering('stdout', _ptys, LINE_BUFFERED)

    def test_buffering_stdout_pipes_unbuffered(self):
        self._test_buffering('stdout', _pipes, UNBUFFERED, python_args=['-u'])

    def test_buffering_stdout_ptys_unbuffered(self):

            rwpair_generator,
            check_output,
            python_args,
        )

    def test_large_write_stdout_pipes(self):
        self._test_large_write('stdout', _pipes)

    def test_large_write_stdout_ptys(self):
        self._test_large_write('stdout', _ptys)

    def test_large_write_stdout_pipes_unbuffered(self):
        self._test_large_write('stdout', _pipes, python_args=['-u'])

    def test_large_write_stdout_ptys_unbuffered(self):
        self._test_large_write('stdout', _ptys, python_args=['-u'])

    def test_large_write_stderr_pipes(self):
        self._test_large_write('stderr', _pipes)

    def test_large_write_stderr_ptys(self):
        self._test_large_write('stderr', _ptys)

    def test_large_write_stderr_pipes_unbuffered(self):
        self._test_large_write('stderr', _pipes, python_args=['-u'])

    def test_large_write_stderr_ptys_unbuffered(self):
        self._test_large_write('stderr', _ptys, python_args=['-u'])

45096:e9e452eafbfb

        for fd in fds:
            try:
                os.close(fd)
            except EnvironmentError:
                pass


@contextlib.contextmanager
def _devnull():
    devnull = os.open(os.devnull, os.O_WRONLY)
    with _closing([devnull]):
        yield (None, devnull)


@contextlib.contextmanager
def _pipes():
    rwpair = os.pipe()

                stdout=child_stream if stream == 'stdout' else None,
                stderr=child_stream if stream == 'stderr' else None,
            )
            try:
                os.close(child_stream)
                if stream_receiver is not None:
                    check_output(stream_receiver, proc)
            except:  # re-raises
                proc.terminate()
                raise
            finally:
                retcode = proc.wait()

            rwpair_generator,
            check_output,
            python_args,
        )

    def test_buffering_stdout_devnull(self):
        self._test_buffering('stdout', _devnull, None)

    def test_buffering_stdout_pipes(self):
        self._test_buffering('stdout', _pipes, FULLY_BUFFERED)

    def test_buffering_stdout_ptys(self):
        self._test_buffering('stdout', _ptys, LINE_BUFFERED)

    def test_buffering_stdout_devnull_unbuffered(self):
        self._test_buffering('stdout', _devnull, None, python_args=['-u'])

    def test_buffering_stdout_pipes_unbuffered(self):
        self._test_buffering('stdout', _pipes, UNBUFFERED, python_args=['-u'])

    def test_buffering_stdout_ptys_unbuffered(self):

            rwpair_generator,
            check_output,
            python_args,
        )

    def test_large_write_stdout_devnull(self):
        self._test_large_write('stdout', _devnull)

    def test_large_write_stdout_pipes(self):
        self._test_large_write('stdout', _pipes)

    def test_large_write_stdout_ptys(self):
        self._test_large_write('stdout', _ptys)

    def test_large_write_stdout_devnull_unbuffered(self):
        self._test_large_write('stdout', _devnull, python_args=['-u'])

    def test_large_write_stdout_pipes_unbuffered(self):
        self._test_large_write('stdout', _pipes, python_args=['-u'])

    def test_large_write_stdout_ptys_unbuffered(self):
        self._test_large_write('stdout', _ptys, python_args=['-u'])

    def test_large_write_stderr_devnull(self):
        self._test_large_write('stderr', _devnull)

    def test_large_write_stderr_pipes(self):
        self._test_large_write('stderr', _pipes)

    def test_large_write_stderr_ptys(self):
        self._test_large_write('stderr', _ptys)

    def test_large_write_stderr_devnull_unbuffered(self):
        self._test_large_write('stderr', _devnull, python_args=['-u'])

    def test_large_write_stderr_pipes_unbuffered(self):
        self._test_large_write('stderr', _pipes, python_args=['-u'])

    def test_large_write_stderr_ptys_unbuffered(self):
        self._test_large_write('stderr', _ptys, python_args=['-u'])