// Check if getVolumeCount returns correct data
	count := metricCollector.getVolumeCount()
	if len(count) != 2 {
		t.Errorf("getVolumeCount failed. Expected <2> states, got <%d>", len(count))
	}

	dswCount, ok := count["desired_state_of_world"]
	if !ok {
		t.Errorf("getVolumeCount failed. Expected <desired_state_of_world>, got nothing")
	}

	for stateName, pluginCount := range c.getVolumeCount() {
		for pluginName, count := range pluginCount {
			ch <- metrics.NewLazyConstMetric(totalVolumesDesc,
				metrics.GaugeValue,
				float64(count),
				pluginName,
				stateName)
		}
	}
}

func (c *totalVolumesCollector) getVolumeCount() volumeCount {
	counter := make(volumeCount)