collector := &logMetricsCollector{
		podStats: func(_ context.Context) ([]statsapi.PodStats, error) {
			return []statsapi.PodStats{}, nil
		},
	}

	if err := testutil.CustomCollectAndCompare(collector, strings.NewReader(""), ""); err != nil {
		t.Fatal(err)
	}
}

func TestMetricsCollected(t *testing.T) {
	// Refresh Desc to share with different registry
	descLogSize = descLogSize.GetRawDesc()

	mockStatsProvider.EXPECT().ListPodStats(ctx).Return(podStats, nil).AnyTimes()
	mockStatsProvider.EXPECT().ListPodStatsAndUpdateCPUNanoCoreUsage(ctx).Return(podStats, nil).AnyTimes()
	if err := testutil.CustomCollectAndCompare(&volumeStatsCollector{statsProvider: mockStatsProvider}, strings.NewReader(want), metrics...); err != nil {
		t.Errorf("unexpected collecting result:\n%s", err)
	}
}

			provider.EXPECT().GetCPUAndMemoryStats(ctx).Return(tc.summary, tc.summaryErr).AnyTimes()
			collector := NewResourceMetricsCollector(provider)

			if err := testutil.CustomCollectAndCompare(collector, strings.NewReader(tc.expectedMetrics), interestedMetrics...); err != nil {
				t.Fatal(err)
			}
		})
	}
}

func uint64Ptr(u uint64) *uint64 {
	return &u