def METHOD_NAME(self):
    d = GpDbidFile(TESTDIR)
    d2 = copy.copy(d)
    d.dbid = 10
    d.write_gp_dbid()
    d2.read_gp_dbid()
    assert d.dbid == d2.dbid
    assert d.standby_dbid == d2.standby_dbid