// the eviction list.
func assertKeys(t *testing.T, gotKeys, wantKeys []interface{}) {
	t.Helper()
	if diff := cmp.Diff(gotKeys, wantKeys); diff != "" {
		t.Errorf("Wrong result for keys: diff (-got +want):\n%s", diff)
	}
}

func TestSimpleGet(t *testing.T) {
	c := NewLRUExpireCache(10)
	c.Add("long-lived", "12345", 10*time.Hour)

	assertKeys(t, c.Keys(), []interface{}{"long-lived"})