def test_changey(self):
output = StringIO()
t = GcodeTurtle(fd=output)
t.sety(10)
prelude = output.getvalue()
t.changey(20)
output_line = output.getvalue()
output_line = output_line.replace(prelude, "")
output_line_parts = output_line.split(" ")
self.assertEqual(len(output_line_parts), 3)
self.assertEqual(output_line[-1], "\n")
self.assertEqual(output_line.count("\n"), 1)
self.assertEqual("G1", output_line_parts[0])
self.assertEqual("Y30.000", output_line_parts[1])
self.assertEqual("E", output_line_parts[2][0])
