def METHOD_NAME(self):
    utime_mock = Mock(
        netValues = [('NULL',None,12345)],
        netPrevValues = [('NULL',None,12354)]
    )
    group = {'kernel.all.cpu.user':utime_mock}
    m_repo = MetricRepository(group)
    c_utime = m_repo.current_value('kernel.all.cpu.user',None)
    self.assertEqual(c_utime,12345)