simplelru.go

package main

import (
	"github.com/hashicorp/golang-lru/simplelru"
	"log"
)

func main() {
	log.Println("Hello, playground")

	evictCounter := 0
	onEvicted := func(k interface{}, v interface{}) {
		if k != v {
			log.Fatalf("Evict values not equal (%v!=%v)", k, v)
		}
		evictCounter++
	}
	l, err := simplelru.NewLRU(128, onEvicted)
	if err != nil {
		log.Fatalf("err: %v", err)
	}

	for i := 0; i < 256; i++ {
		l.Add(i, i)
	}
	if l.Len() != 128 {
		log.Fatalf("bad len: %v", l.Len())
	}

	if evictCounter != 128 {
		log.Fatalf("bad evict count: %v", evictCounter)
	}

	for i, k := range l.Keys() {
		if v, ok := l.Get(k); !ok || v != k || v != i+128 {
			log.Fatalf("bad key: %v", k)
		}
		log.Println(i, k)
	}

}