// NewLRUExpireCache creates an expiring cache with the given size
func NewLRUExpireCache(maxSize int) *LRUExpireCache {
	return NewLRUExpireCacheWithClock(maxSize, realClock{})
}

// NewLRUExpireCacheWithClock creates an expiring cache with the given size, using the specified clock to obtain the current time.
func NewLRUExpireCacheWithClock(maxSize int, clock Clock) *LRUExpireCache {
	if maxSize <= 0 {
		panic("maxSize must be > 0")
	}

	expectNotEntry(t, c, "long-lived")
	expectEntry(t, c, "other-long-lived", "12345")
}

func TestExpiredGet(t *testing.T) {
	fakeClock := testingclock.NewFakeClock(time.Now())
	c := NewLRUExpireCacheWithClock(10, fakeClock)
	c.Add("short-lived", "12345", 1*time.Millisecond)
	// ensure the entry expired
	fakeClock.Step(2 * time.Millisecond)

	// Keys() should not return expired keys.

	return newLifecycleWithClock(immortalNamespaces, clock.RealClock{})
}

func newLifecycleWithClock(immortalNamespaces sets.String, clock utilcache.Clock) (*Lifecycle, error) {
	forceLiveLookupCache := utilcache.NewLRUExpireCacheWithClock(100, clock)
	return &Lifecycle{
		Handler:              admission.NewHandler(admission.Create, admission.Update, admission.Delete),
		immortalNamespaces:   immortalNamespaces,