// pflag.Value interface.
func (*PortRange) Type() string {
	return "portRange"
}

// ParsePortRange parses a string of the form "min-max", inclusive at both
// ends, and initializes a new PortRange from it.
func ParsePortRange(value string) (*PortRange, error) {
	pr := &PortRange{}
	err := pr.Set(value)
	if err != nil {
		return nil, err
	}
	return pr, nil
}

package portallocator

import (
	"testing"

	"k8s.io/apimachinery/pkg/util/net"
)

// TestDryRunAllocate tests the Allocate function in dry run mode
func TestDryRunAllocate(t *testing.T) {
	pr, err := net.ParsePortRange("10000-10200")
	if err != nil {
		t.Fatal(err)
	}

	// Allocate some ports before calling
	previouslyAllocated := []int{10000, 10010, 10020}
	r, err := NewInMemory(*pr)
	if err != nil {
		t.Fatal(err)

type PortRangeVar struct {
	Val *string
}

// Set sets the flag value
func (v PortRangeVar) Set(s string) error {
	if _, err := utilnet.ParsePortRange(s); err != nil {
		return fmt.Errorf("%q is not a valid port range: %v", s, err)
	}
	if v.Val == nil {
		// it's okay to panic here since this is programmer error

	})
}

// NewFromSnapshot allocates a PortAllocator and initializes it from a snapshot.
func NewFromSnapshot(snap *api.RangeAllocation) (*PortAllocator, error) {
	pr, err := net.ParsePortRange(snap.Range)
	if err != nil {
		return nil, err
	}
	r, err := NewInMemory(*pr)
	if err != nil {
		return nil, err
	}
	if err := r.Restore(*pr, snap.Data); err != nil {
		return nil, err
	}