subprocess_test.py 文件源码

def test_communicate_with_poll():
    # This test was being skipped since git 25812fca8, I don't there's
    # a need to do this. The original comment:
    #
    # https://github.com/eventlet/eventlet/pull/24
    # `eventlet.green.subprocess.Popen.communicate()` was broken
    # in Python 2.7 because the usage of the `select` module was moved from
    # `_communicate` into two other methods `_communicate_with_select`
    # and `_communicate_with_poll`. Link to 2.7's implementation:
    # http://hg.python.org/cpython/file/2145593d108d/Lib/subprocess.py#l1255

    p = subprocess.Popen(
        [sys.executable, '-c', 'import time; time.sleep(0.5)'],
        stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    t1 = time.time()
    eventlet.with_timeout(0.1, p.communicate, timeout_value=True)
    tdiff = time.time() - t1
    assert 0.1 <= tdiff <= 0.2, 'did not stop within allowed time'