def test_other_error(self, unpack):
unpack.side_effect = raiser(ValueError)
with self.assertRaises(ValueError):
get_terminal_width()
def test_get_terminal_width(self, unpack):
unpack.return_value = ['foo', 80]
self.assertEqual(get_terminal_width(), 80)
def test_io_error(self, unpack):
unpack.side_effect = raiser(IOError)
self.assertIsNone(get_terminal_width())
