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package storage
import (	"testing"	"time")
func TestMemCache(t *testing.T) {	cache, err := OpenCache("memory:test?gcInterval=3s")	if err != nil {		t.Error(err)		return	}
	mc, ok := cache.(*mCache)	if !ok {		t.Fatal("not a memory cache")	}	if mc.gcInterval != 3*time.Second {		t.Fatalf("invalid gc interval %v, should be %v", mc.gcInterval, 3*time.Second)	}
	cache.Set("key", []byte("hello world"), 0)	value, err := cache.Get("key")	if err != nil {		t.Fatal(err)	}	if string(value) != "hello world" {		t.Fatalf("invalid value(%v), shoud be 'hello world'", value)	}
	cache.Set("key2", []byte("hello world"), 3*time.Second)	_, err = cache.Get("key2")	if err != nil {		t.Fatal(err)	}
	time.Sleep(3 * time.Second)	_, err = cache.Get("key2")	if err != ErrExpired {		t.Fatal("should be expired error, but", err)	}}