go-pulse/blockpool/test/hash_pool.go

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package test
import (
"sync"
"github.com/ethereum/go-ethereum/crypto"
)
// test helpers
// TODO: move into common test helper package (see p2p/crypto etc.)
func NewHashPool() *TestHashPool {
return &TestHashPool{intToHash: make(intToHash), hashToInt: make(hashToInt)}
}
type intToHash map[int][]byte
type hashToInt map[string]int
// hashPool is a test helper, that allows random hashes to be referred to by integers
type TestHashPool struct {
intToHash
hashToInt
lock sync.Mutex
}
func newHash(i int) []byte {
return crypto.Sha3([]byte(string(i)))
}
func (self *TestHashPool) IndexesToHashes(indexes []int) (hashes [][]byte) {
self.lock.Lock()
defer self.lock.Unlock()
for _, i := range indexes {
hash, found := self.intToHash[i]
if !found {
hash = newHash(i)
self.intToHash[i] = hash
self.hashToInt[string(hash)] = i
}
hashes = append(hashes, hash)
}
return
}
func (self *TestHashPool) HashesToIndexes(hashes [][]byte) (indexes []int) {
self.lock.Lock()
defer self.lock.Unlock()
for _, hash := range hashes {
i, found := self.hashToInt[string(hash)]
if !found {
i = -1
}
indexes = append(indexes, i)
}
return
}