python sub process test (blocking IO) works on py 2.6 on _old_ server

shell_interact_test.py

import inspect
import os
import subprocess
import unittest


class TestAThing(unittest.TestCase):
    def test_this_file_seen_by_ls(self):
        proc_ls = subprocess.Popen(['/bin/bash'],   
                                   stdin=subprocess.PIPE,
                                   stdout=subprocess.PIPE)
        ls_output_from_stdout, errs = proc_ls.communicate('ls -lash')
        name_of_this_file = os.path.basename(__file__)
        this_file_seen_by_ls = name_of_this_file in ls_output_from_stdout
        self.assertTrue(name_of_this_file in ls_output_from_stdout)

    def test_that_will_fail(self):
        self.fail()

    def test_that_always_passes(self):
        proc_hostname = subprocess.Popen(['/bin/bash'],   
                                   stdin=subprocess.PIPE,
                                   stdout=subprocess.PIPE)
        hostname_from_stdout, errs = proc_hostname.communicate('hostname')
        this_func_name_got_evilly = inspect.stack()[0][3]
        subprocess.Popen(['cat'], stdin=subprocess.PIPE).communicate('''
            Hello, I'm a multiline-string
            being passed to `cat` on stdout
            simliar to a heredoc.

            also, I got this from running
            `hostname`
            {0}
            in method `{1}`\n
        '''.format(hostname_from_stdout, this_func_name_got_evilly))
        self.assertTrue(True)




if __name__ == '__main__':
    unittest.main()