'Cache the qualifiers on the first query against RAW Performance classes.'

def test_raw_cache_qualifiers(self):

    wmi_raw_sampler = WMISampler('Win32_PerfRawData_PerfOS_System', ['CounterRawCount', 'CounterCounter'])
    wmi_raw_sampler._query()
    self.assertWMIQuery(flags=131120)
    wmi_raw_sampler._query()
    self.assertWMIQuery(flags=48)
    self.assertTrue(wmi_raw_sampler._property_counter_types)
    self.assertIn('CounterRawCount', wmi_raw_sampler._property_counter_types)
    self.assertIn('CounterCounter', wmi_raw_sampler._property_counter_types)
