// TODO: Enable this on Windows once support VolumeMode=Block is added.
	metrics := NewMetricsBlock("")
	actual, err := metrics.GetMetrics()
	expected := &Metrics{}
	if !volumetest.MetricsEqualIgnoreTimestamp(actual, expected) {
		t.Errorf("Expected empty Metrics from uninitialized MetricsBlock, actual %v", *actual)
	}
	if err == nil {

// returns an error
func TestMetricsDuRequirePath(t *testing.T) {
	metrics := NewMetricsDu("")
	actual, err := metrics.GetMetrics()
	expected := &Metrics{}
	if !volumetest.MetricsEqualIgnoreTimestamp(actual, expected) {
		t.Errorf("Expected empty Metrics from uninitialized MetricsDu, actual %v", *actual)
	}
	if err == nil {
		t.Errorf("Expected error when calling GetMetrics on uninitialized MetricsDu, actual nil")