}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			plug, tmpDir := newTestPlugin(t, nil)
			defer os.RemoveAll(tmpDir)

			spec := volume.NewSpecFromPersistentVolume(makeTestPV("test-pv", 10, "expandable", "test-vol"), false)
			if tc.enableCSINodeExpandSecret {
				spec.PersistentVolume.Spec.CSI.NodeExpandSecretRef = &api.SecretReference{
					Name:      tc.secret.Name,
					Namespace: tc.secret.Namespace,
				}

	return flexvolume.GetDynamicPluginProber(config.FlexVolumePluginDir, exec.New() /*exec.Interface*/)
}

// ProbeExpandableVolumePlugins returns volume plugins which are expandable
func ProbeExpandableVolumePlugins(logger klog.Logger, config persistentvolumeconfig.VolumeConfiguration) ([]volume.VolumePlugin, error) {
	var err error
	allPlugins := []volume.VolumePlugin{}

	"istio.io/api/meta/v1alpha1"
	"istio.io/istio/pkg/config"
	"istio.io/istio/pkg/util/sets"
)

// Task to be performed.
type Task func(entry cacheEntry)

// WorkerQueue implements an expandable goroutine pool which executes at most one concurrent routine per target
// resource.  Multiple calls to Push() will not schedule multiple executions per target resource, but will ensure that