package trie
import (
"bytes"
"encoding/hex"
"encoding/json"
"fmt"
"io/ioutil"
"math/rand"
"net/http"
"reflect"
"testing"
"time"
"github.com/ethereum/go-ethereum/ethutil"
)
const LONG_WORD = "1234567890abcdefghijklmnopqrstuvwxxzABCEFGHIJKLMNOPQRSTUVWXYZ"
type MemDatabase struct {
db map[string][]byte
}
func NewMemDatabase() (*MemDatabase, error) {
db := &MemDatabase{db: make(map[string][]byte)}
return db, nil
}
func (db *MemDatabase) Put(key []byte, value []byte) {
db.db[string(key)] = value
}
func (db *MemDatabase) Get(key []byte) ([]byte, error) {
return db.db[string(key)], nil
}
func (db *MemDatabase) Delete(key []byte) error {
delete(db.db, string(key))
return nil
}
func (db *MemDatabase) Print() {}
func (db *MemDatabase) Close() {}
func (db *MemDatabase) LastKnownTD() []byte { return nil }
func NewTrie() (*MemDatabase, *Trie) {
db, _ := NewMemDatabase()
return db, New(db, "")
}
func TestTrieSync(t *testing.T) {
db, trie := NewTrie()
trie.Update("dog", LONG_WORD)
if len(db.db) != 0 {
t.Error("Expected no data in database")
}
trie.Sync()
if len(db.db) == 0 {
t.Error("Expected data to be persisted")
}
}
func TestTrieDirtyTracking(t *testing.T) {
_, trie := NewTrie()
trie.Update("dog", LONG_WORD)
if !trie.cache.IsDirty {
t.Error("Expected trie to be dirty")
}
trie.Sync()
if trie.cache.IsDirty {
t.Error("Expected trie not to be dirty")
}
trie.Update("test", LONG_WORD)
trie.cache.Undo()
if trie.cache.IsDirty {
t.Error("Expected trie not to be dirty")
}
}
func TestTrieReset(t *testing.T) {
_, trie := NewTrie()
trie.Update("cat", LONG_WORD)
if len(trie.cache.nodes) == 0 {
t.Error("Expected cached nodes")
}
trie.cache.Undo()
if len(trie.cache.nodes) != 0 {
t.Error("Expected no nodes after undo", len(trie.cache.nodes))
}
}
func TestTrieGet(t *testing.T) {
_, trie := NewTrie()
trie.Update("cat", LONG_WORD)
x := trie.Get("cat")
if x != LONG_WORD {
t.Error("expected %s, got %s", LONG_WORD, x)
}
}
func TestTrieUpdating(t *testing.T) {
_, trie := NewTrie()
trie.Update("cat", LONG_WORD)
trie.Update("cat", LONG_WORD+"1")
x := trie.Get("cat")
if x != LONG_WORD+"1" {
t.Error("expected %S, got %s", LONG_WORD+"1", x)
}
}
func TestTrieCmp(t *testing.T) {
_, trie1 := NewTrie()
_, trie2 := NewTrie()
trie1.Update("doge", LONG_WORD)
trie2.Update("doge", LONG_WORD)
if !trie1.Cmp(trie2) {
t.Error("Expected tries to be equal")
}
trie1.Update("dog", LONG_WORD)
trie2.Update("cat", LONG_WORD)
if trie1.Cmp(trie2) {
t.Errorf("Expected tries not to be equal %x %x", trie1.Root, trie2.Root)
}
}
func TestTrieDelete(t *testing.T) {
t.Skip()
_, trie := NewTrie()
trie.Update("cat", LONG_WORD)
exp := trie.Root
trie.Update("dog", LONG_WORD)
trie.Delete("dog")
if !reflect.DeepEqual(exp, trie.Root) {
t.Errorf("Expected tries to be equal %x : %x", exp, trie.Root)
}
trie.Update("dog", LONG_WORD)
exp = trie.Root
trie.Update("dude", LONG_WORD)
trie.Delete("dude")
if !reflect.DeepEqual(exp, trie.Root) {
t.Errorf("Expected tries to be equal %x : %x", exp, trie.Root)
}
}
func TestTrieDeleteWithValue(t *testing.T) {
t.Skip()
_, trie := NewTrie()
trie.Update("c", LONG_WORD)
exp := trie.Root
trie.Update("ca", LONG_WORD)
trie.Update("cat", LONG_WORD)
trie.Delete("ca")
trie.Delete("cat")
if !reflect.DeepEqual(exp, trie.Root) {
t.Errorf("Expected tries to be equal %x : %x", exp, trie.Root)
}
}
func TestTriePurge(t *testing.T) {
_, trie := NewTrie()
trie.Update("c", LONG_WORD)
trie.Update("ca", LONG_WORD)
trie.Update("cat", LONG_WORD)
lenBefore := len(trie.cache.nodes)
it := trie.NewIterator()
if num := it.Purge(); num != 3 {
t.Errorf("Expected purge to return 3, got %d", num)
}
if lenBefore == len(trie.cache.nodes) {
t.Errorf("Expected cached nodes to be deleted")
}
}
func h(str string) string {
d, err := hex.DecodeString(str)
if err != nil {
panic(err)
}
return string(d)
}
func get(in string) (out string) {
if len(in) > 2 && in[:2] == "0x" {
out = h(in[2:])
} else {
out = in
}
return
}
type Test struct {
Name string
In map[string]string
Root string
}
func CreateTest(name string, data []byte) (Test, error) {
t := Test{Name: name}
err := json.Unmarshal(data, &t)
if err != nil {
return Test{}, fmt.Errorf("%v", err)
}
return t, nil
}
func CreateTests(uri string, cb func(Test)) map[string]Test {
resp, err := http.Get(uri)
if err != nil {
panic(err)
}
defer resp.Body.Close()
data, err := ioutil.ReadAll(resp.Body)
var objmap map[string]*json.RawMessage
err = json.Unmarshal(data, &objmap)
if err != nil {
panic(err)
}
tests := make(map[string]Test)
for name, testData := range objmap {
test, err := CreateTest(name, *testData)
if err != nil {
panic(err)
}
if cb != nil {
cb(test)
}
tests[name] = test
}
return tests
}
func RandomData() [][]string {
data := [][]string{
{"0x000000000000000000000000ec4f34c97e43fbb2816cfd95e388353c7181dab1", "0x4e616d6552656700000000000000000000000000000000000000000000000000"},
{"0x0000000000000000000000000000000000000000000000000000000000000045", "0x22b224a1420a802ab51d326e29fa98e34c4f24ea"},
{"0x0000000000000000000000000000000000000000000000000000000000000046", "0x67706c2076330000000000000000000000000000000000000000000000000000"},
{"0x000000000000000000000000697c7b8c961b56f675d570498424ac8de1a918f6", "0x6f6f6f6820736f2067726561742c207265616c6c6c793f000000000000000000"},
{"0x0000000000000000000000007ef9e639e2733cb34e4dfc576d4b23f72db776b2", "0x4655474156000000000000000000000000000000000000000000000000000000"},
{"0x6f6f6f6820736f2067726561742c207265616c6c6c793f000000000000000000", "0x697c7b8c961b56f675d570498424ac8de1a918f6"},
{"0x4655474156000000000000000000000000000000000000000000000000000000", "0x7ef9e639e2733cb34e4dfc576d4b23f72db776b2"},
{"0x4e616d6552656700000000000000000000000000000000000000000000000000", "0xec4f34c97e43fbb2816cfd95e388353c7181dab1"},
}
var c [][]string
for len(data) != 0 {
e := rand.Intn(len(data))
c = append(c, data[e])
copy(data[e:], data[e+1:])
data[len(data)-1] = nil
data = data[:len(data)-1]
}
return c
}
const MaxTest = 1000
// This test insert data in random order and seeks to find indifferences between the different tries
func TestRegression(t *testing.T) {
rand.Seed(time.Now().Unix())
roots := make(map[string]int)
for i := 0; i < MaxTest; i++ {
_, trie := NewTrie()
data := RandomData()
for _, test := range data {
trie.Update(test[0], test[1])
}
trie.Delete("0x4e616d6552656700000000000000000000000000000000000000000000000000")
roots[string(trie.Root.([]byte))] += 1
}
if len(roots) > 1 {
for root, num := range roots {
t.Errorf("%x => %d\n", root, num)
}
}
}
func TestDelete(t *testing.T) {
_, trie := NewTrie()
trie.Update("a", "jeffreytestlongstring")
trie.Update("aa", "otherstring")
trie.Update("aaa", "othermorestring")
trie.Update("aabbbbccc", "hithere")
trie.Update("abbcccdd", "hstanoehutnaheoustnh")
trie.Update("rnthaoeuabbcccdd", "hstanoehutnaheoustnh")
trie.Update("rneuabbcccdd", "hstanoehutnaheoustnh")
trie.Update("rneuabboeusntahoeucccdd", "hstanoehutnaheoustnh")
trie.Update("rnxabboeusntahoeucccdd", "hstanoehutnaheoustnh")
trie.Delete("aaboaestnuhbccc")
trie.Delete("a")
trie.Update("a", "nthaonethaosentuh")
trie.Update("c", "shtaosntehua")
trie.Delete("a")
trie.Update("aaaa", "testmegood")
_, t2 := NewTrie()
trie.NewIterator().Each(func(key string, v *ethutil.Value) {
if key == "aaaa" {
t2.Update(key, v.Str())
} else {
t2.Update(key, v.Str())
}
})
a := ethutil.NewValue(trie.Root).Bytes()
b := ethutil.NewValue(t2.Root).Bytes()
if bytes.Compare(a, b) != 0 {
t.Errorf("Expected %x and %x to be equal", a, b)
}
}
func TestTerminator(t *testing.T) {
key := CompactDecode("hello")
if !HasTerm(key) {
t.Errorf("Expected %v to have a terminator", key)
}
}
func TestIt(t *testing.T) {
_, trie := NewTrie()
trie.Update("cat", "cat")
trie.Update("doge", "doge")
trie.Update("wallace", "wallace")
it := trie.Iterator()
inputs := []struct {
In, Out string
}{
{"", "cat"},
{"bobo", "cat"},
{"c", "cat"},
{"car", "cat"},
{"catering", "doge"},
{"w", "wallace"},
{"wallace123", ""},
}
for _, test := range inputs {
res := string(it.Next(test.In))
if res != test.Out {
t.Errorf(test.In, "failed. Got", res, "Expected", test.Out)
}
}
}
func TestBeginsWith(t *testing.T) {
a := CompactDecode("hello")
b := CompactDecode("hel")
if BeginsWith(a, b) {
t.Errorf("Expected %x to begin with %x", a, b)
}
if BeginsWith(b, a) {
t.Errorf("Expected %x not to begin with %x", b, a)
}
}
func TestItems(t *testing.T) {
_, trie := NewTrie()
trie.Update("A", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
exp := "d23786fb4a010da3ce639d66d5e904a11dbc02746d1ce25029e53290cabf28ab"
if bytes.Compare(trie.GetRoot(), ethutil.Hex2Bytes(exp)) != 0 {
t.Errorf("Expected root to be %s but got", exp, trie.GetRoot())
}
}
/*
func TestRndCase(t *testing.T) {
_, trie := NewTrie()
data := []struct{ k, v string }{
{"0000000000000000000000000000000000000000000000000000000000000001", "a07573657264617461000000000000000000000000000000000000000000000000"},
{"0000000000000000000000000000000000000000000000000000000000000003", "8453bb5b31"},
{"0000000000000000000000000000000000000000000000000000000000000004", "850218711a00"},
{"0000000000000000000000000000000000000000000000000000000000000005", "9462d7705bd0b3ecbc51a8026a25597cb28a650c79"},
{"0000000000000000000000000000000000000000000000000000000000000010", "947e70f9460402290a3e487dae01f610a1a8218fda"},
{"0000000000000000000000000000000000000000000000000000000000000111", "01"},
{"0000000000000000000000000000000000000000000000000000000000000112", "a053656e6174650000000000000000000000000000000000000000000000000000"},
{"0000000000000000000000000000000000000000000000000000000000000113", "a053656e6174650000000000000000000000000000000000000000000000000000"},
{"53656e6174650000000000000000000000000000000000000000000000000000", "94977e3f62f5e1ed7953697430303a3cfa2b5b736e"},
}
for _, e := range data {
trie.Update(string(ethutil.Hex2Bytes(e.k)), string(ethutil.Hex2Bytes(e.v)))
}
fmt.Printf("root after update %x\n", trie.Root)
trie.NewIterator().Each(func(k string, v *ethutil.Value) {
fmt.Printf("%x %x\n", k, v.Bytes())
})
data = []struct{ k, v string }{
{"0000000000000000000000000000000000000000000000000000000000000112", ""},
{"436974697a656e73000000000000000000000000000000000000000000000001", ""},
{"436f757274000000000000000000000000000000000000000000000000000002", ""},
{"53656e6174650000000000000000000000000000000000000000000000000000", ""},
{"436f757274000000000000000000000000000000000000000000000000000000", ""},
{"53656e6174650000000000000000000000000000000000000000000000000001", ""},
{"0000000000000000000000000000000000000000000000000000000000000113", ""},
{"436974697a656e73000000000000000000000000000000000000000000000000", ""},
{"436974697a656e73000000000000000000000000000000000000000000000002", ""},
{"436f757274000000000000000000000000000000000000000000000000000001", ""},
{"0000000000000000000000000000000000000000000000000000000000000111", ""},
{"53656e6174650000000000000000000000000000000000000000000000000002", ""},
}
for _, e := range data {
trie.Delete(string(ethutil.Hex2Bytes(e.k)))
}
fmt.Printf("root after delete %x\n", trie.Root)
trie.NewIterator().Each(func(k string, v *ethutil.Value) {
fmt.Printf("%x %x\n", k, v.Bytes())
})
fmt.Printf("%x\n", trie.Get(string(ethutil.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))))
}
*/
func TestOtherSomething(t *testing.T) {
_, trie := NewTrie()
vals := []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"ether", ""},
{"dog", "puppy"},
{"shaman", ""},
}
for _, val := range vals {
trie.Update(val.k, val.v)
}
exp := ethutil.Hex2Bytes("5991bb8c6514148a29db676a14ac506cd2cd5775ace63c30a4fe457715e9ac84")
hash := trie.Root.([]byte)
if !bytes.Equal(hash, exp) {
t.Errorf("expected %x got %x", exp, hash)
}
}
func BenchmarkGets(b *testing.B) {
_, trie := NewTrie()
vals := []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"ether", ""},
{"dog", "puppy"},
{"shaman", ""},
{"somethingveryoddindeedthis is", "myothernodedata"},
}
for _, val := range vals {
trie.Update(val.k, val.v)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
trie.Get("horse")
}
}
func BenchmarkUpdate(b *testing.B) {
_, trie := NewTrie()
b.ResetTimer()
for i := 0; i < b.N; i++ {
trie.Update(fmt.Sprintf("aaaaaaaaaaaaaaa%d", i), "value")
}
fmt.Println(trie.root)
}
