def METHOD_NAME(self):
    status, out, err = self.call2(self.filename)
    self.assertTrue(status)
    status, out, err = self.call2(self.filename, self.filename)
    self.assertFalse(status)
    status, out, err = self.call2(self.blank_file, self.filename)
    self.assertTrue(status)
    status, out, err = self.call2("", self.filename)
    self.assertTrue(status)
    status, out, err = self.call2(self.filename, self.blank_file)
    self.assertFalse(status)