regrtest.py 文件源码

def run_test_in_subprocess(testname, ns):
    """Run the given test in a subprocess with --slaveargs.

    ns is the option Namespace parsed from command-line arguments. regrtest
    is invoked in a subprocess with the --slaveargs argument; when the
    subprocess exits, its return code, stdout and stderr are returned as a
    3-tuple.
    """
    from subprocess import Popen, PIPE
    base_cmd = ([sys.executable] + support.args_from_interpreter_flags() +
                ['-X', 'faulthandler', '-m', 'test.regrtest'])

    slaveargs = (
            (testname, ns.verbose, ns.quiet),
            dict(huntrleaks=ns.huntrleaks,
                 use_resources=ns.use_resources,
                 output_on_failure=ns.verbose3,
                 timeout=ns.timeout, failfast=ns.failfast,
                 match_tests=ns.match_tests))
    # Running the child from the same working directory as regrtest's original
    # invocation ensures that TEMPDIR for the child is the same when
    # sysconfig.is_python_build() is true. See issue 15300.
    popen = Popen(base_cmd + ['--slaveargs', json.dumps(slaveargs)],
                  stdout=PIPE, stderr=PIPE,
                  universal_newlines=True,
                  close_fds=(os.name != 'nt'),
                  cwd=support.SAVEDCWD)
    stdout, stderr = popen.communicate()
    retcode = popen.wait()
    return retcode, stdout, stderr