'Test the _write_comment_textbox() method'

def test_write_comment_textbox(self):

    self.vml._write_comment_textbox()
    exp = '<v:textbox    style="mso-direction-alt:auto"><div    style="text-align:left"></div></v:textbox>'
    got = self.fh.getvalue()
    self.assertEqual(got, exp)
