def METHOD_NAME(self):
    proc_utime_mock = Mock(
        netValues = [(Mock(inst=111),'dummyprocess',12345)],
        netPrevValues = [(Mock(inst=111),'dummyprocess',12354)]
    )
    group = {'kernel.percpu.cpu.user':proc_utime_mock}
    m_repo = MetricRepository(group)
    m_repo.current_cached_values = {'kernel.percpu.cpu.user':{111:12354}}
    with mock.patch.object(m_repo,'_MetricRepository__fetch_current_values',return_value={111:12345}) as method:
        c_ptime = m_repo.current_value('kernel.percpu.cpu.user',111)
        fetch_call_count = method.call_count
    self.assertEqual(fetch_call_count,0)