36     teststr = "ab cd\n"  variable in Popen2Test
40     expected = teststr.strip()
61     def validate_output(self, teststr, expected_out, r, w, e=None):  argument
62         w.write(teststr)
66                          (teststr, got))
74         self.validate_output(self.teststr, self.expected, r, w)
79             self.validate_output(self.teststr, self.expected, r, w, e)
82         self.validate_output(self.teststr, self.expected, r, w, e)
88             self.validate_output(self.teststr, self.expected, r, w)
90             w, r = os.popen2(["echo", self.teststr])
92             self.assertEqual(got, self.teststr + "\n")
95         self.validate_output(self.teststr, self.expected, r, w)
101             self.validate_output(self.teststr, self.expected, r, w, e)
103             w, r, e = os.popen3(["echo", self.teststr])
105             self.assertEqual(got, self.teststr + "\n")
110         self.validate_output(self.teststr, self.expected, r, w, e)
115             self.validate_output(self.teststr, self.expected, r, w)
117             w, r = os.popen4(["echo", self.teststr])
119             self.assertEqual(got, self.teststr + "\n")
122         self.validate_output(self.teststr, self.expected, r, w)