Using TinyLFU doesn't work as you would expect a cache to about cache HOT 1 OPEN

this is shit，set twice and get nil

func TestTinyLFU(t *testing.T) {
lfu := cache.NewTinyLFU(100, 300)
lfu.Set("a", []byte("a"))
lfu.Set("a", []byte("b"))
lfu.Set("a", []byte("c"))
value, ok := lfu.Get("a")

if !ok {
	t.Errorf("expected=true got=false")
}
if string(value) != "c" {
	t.Errorf("expected=c got=%s", value)
}

}

from cache.