'Test the _write_button_shapetype() method'

def test_write_button_shapetype(self):

    self.vml._write_button_shapetype()
    exp = '<v:shapetype    id="_x0000_t201"    coordsize="21600,21600"    o:spt="201"    path="m,l,21600r21600,l21600,xe"><v:stroke    joinstyle="miter"/><v:path    shadowok="f"    o:extrusionok="f"    strokeok="f"    fillok="f"    o:connecttype="rect"/><o:lock    v:ext="edit"    shapetype="t"/></v:shapetype>'
    got = self.fh.getvalue()
    self.assertEqual(got, exp)
