'Test the _write_c_nv_graphic_frame_pr() method'

def test_write_c_nv_graphic_frame_pr(self):

    self.drawing._write_c_nv_graphic_frame_pr()
    exp = '<xdr:cNvGraphicFramePr><a:graphicFrameLocks    noGrp="1"/></xdr:cNvGraphicFramePr>'
    got = self.fh.getvalue()
    self.assertEqual(got, exp)
