package trie
import (
"encoding/hex"
"encoding/json"
"fmt"
checker "gopkg.in/check.v1"
"io/ioutil"
"math/rand"
"net/http"
"time"
"github.com/ethereum/go-ethereum/ethutil"
)
const LONG_WORD = "1234567890abcdefghijklmnopqrstuvwxxzABCEFGHIJKLMNOPQRSTUVWXYZ"
type TrieSuite struct {
db *MemDatabase
trie *Trie
}
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 (s *TrieSuite) SetUpTest(c *checker.C) {
s.db, s.trie = NewTrie()
}
func (s *TrieSuite) TestTrieSync(c *checker.C) {
s.trie.Update("dog", LONG_WORD)
c.Assert(s.db.db, checker.HasLen, 0, checker.Commentf("Expected no data in database"))
s.trie.Sync()
c.Assert(s.db.db, checker.HasLen, 3)
}
func (s *TrieSuite) TestTrieDirtyTracking(c *checker.C) {
s.trie.Update("dog", LONG_WORD)
c.Assert(s.trie.cache.IsDirty, checker.Equals, true, checker.Commentf("Expected no data in database"))
s.trie.Sync()
c.Assert(s.trie.cache.IsDirty, checker.Equals, false, checker.Commentf("Expected trie to be dirty"))
s.trie.Update("test", LONG_WORD)
s.trie.cache.Undo()
c.Assert(s.trie.cache.IsDirty, checker.Equals, false)
}
func (s *TrieSuite) TestTrieReset(c *checker.C) {
s.trie.Update("cat", LONG_WORD)
c.Assert(s.trie.cache.nodes, checker.HasLen, 1, checker.Commentf("Expected cached nodes"))
s.trie.cache.Undo()
c.Assert(s.trie.cache.nodes, checker.HasLen, 0, checker.Commentf("Expected no nodes after undo"))
}
func (s *TrieSuite) TestTrieGet(c *checker.C) {
s.trie.Update("cat", LONG_WORD)
x := s.trie.Get("cat")
c.Assert(x, checker.DeepEquals, LONG_WORD)
}
func (s *TrieSuite) TestTrieUpdating(c *checker.C) {
s.trie.Update("cat", LONG_WORD)
s.trie.Update("cat", LONG_WORD+"1")
x := s.trie.Get("cat")
c.Assert(x, checker.DeepEquals, LONG_WORD+"1")
}
func (s *TrieSuite) TestTrieCmp(c *checker.C) {
_, trie1 := NewTrie()
_, trie2 := NewTrie()
trie1.Update("doge", LONG_WORD)
trie2.Update("doge", LONG_WORD)
c.Assert(trie1, checker.DeepEquals, trie2)
trie1.Update("dog", LONG_WORD)
trie2.Update("cat", LONG_WORD)
c.Assert(trie1, checker.Not(checker.DeepEquals), trie2)
}
func (s *TrieSuite) TestTrieDelete(c *checker.C) {
s.trie.Update("cat", LONG_WORD)
exp := s.trie.Root
s.trie.Update("dog", LONG_WORD)
s.trie.Delete("dog")
c.Assert(s.trie.Root, checker.DeepEquals, exp)
s.trie.Update("dog", LONG_WORD)
exp = s.trie.Root
s.trie.Update("dude", LONG_WORD)
s.trie.Delete("dude")
c.Assert(s.trie.Root, checker.DeepEquals, exp)
}
func (s *TrieSuite) TestTrieDeleteWithValue(c *checker.C) {
s.trie.Update("c", LONG_WORD)
exp := s.trie.Root
s.trie.Update("ca", LONG_WORD)
s.trie.Update("cat", LONG_WORD)
s.trie.Delete("ca")
s.trie.Delete("cat")
c.Assert(s.trie.Root, checker.DeepEquals, exp)
}
func (s *TrieSuite) TestTriePurge(c *checker.C) {
s.trie.Update("c", LONG_WORD)
s.trie.Update("ca", LONG_WORD)
s.trie.Update("cat", LONG_WORD)
lenBefore := len(s.trie.cache.nodes)
it := s.trie.NewIterator()
num := it.Purge()
c.Assert(num, checker.Equals, 3)
c.Assert(len(s.trie.cache.nodes), checker.Equals, lenBefore)
}
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 TrieTest struct {
Name string
In map[string]string
Root string
}
func CreateTest(name string, data []byte) (TrieTest, error) {
t := TrieTest{Name: name}
err := json.Unmarshal(data, &t)
if err != nil {
return TrieTest{}, fmt.Errorf("%v", err)
}
return t, nil
}
func CreateTests(uri string, cb func(TrieTest)) map[string]TrieTest {
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]TrieTest)
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 (s *TrieSuite) TestRegression(c *checker.C) {
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
}
c.Assert(len(roots) <= 1, checker.Equals, true)
// if len(roots) > 1 {
// for root, num := range roots {
// t.Errorf("%x => %d\n", root, num)
// }
// }
}
func (s *TrieSuite) TestDelete(c *checker.C) {
s.trie.Update("a", "jeffreytestlongstring")
s.trie.Update("aa", "otherstring")
s.trie.Update("aaa", "othermorestring")
s.trie.Update("aabbbbccc", "hithere")
s.trie.Update("abbcccdd", "hstanoehutnaheoustnh")
s.trie.Update("rnthaoeuabbcccdd", "hstanoehutnaheoustnh")
s.trie.Update("rneuabbcccdd", "hstanoehutnaheoustnh")
s.trie.Update("rneuabboeusntahoeucccdd", "hstanoehutnaheoustnh")
s.trie.Update("rnxabboeusntahoeucccdd", "hstanoehutnaheoustnh")
s.trie.Delete("aaboaestnuhbccc")
s.trie.Delete("a")
s.trie.Update("a", "nthaonethaosentuh")
s.trie.Update("c", "shtaosntehua")
s.trie.Delete("a")
s.trie.Update("aaaa", "testmegood")
_, t2 := NewTrie()
s.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(s.trie.Root).Bytes()
b := ethutil.NewValue(t2.Root).Bytes()
c.Assert(a, checker.DeepEquals, b)
}
func (s *TrieSuite) TestTerminator(c *checker.C) {
key := CompactDecode("hello")
c.Assert(HasTerm(key), checker.Equals, true, checker.Commentf("Expected %v to have a terminator", key))
}
func (s *TrieSuite) TestIt(c *checker.C) {
s.trie.Update("cat", "cat")
s.trie.Update("doge", "doge")
s.trie.Update("wallace", "wallace")
it := s.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))
c.Assert(res, checker.Equals, test.Out)
}
}
func (s *TrieSuite) TestBeginsWith(c *checker.C) {
a := CompactDecode("hello")
b := CompactDecode("hel")
c.Assert(BeginsWith(a, b), checker.Equals, false)
c.Assert(BeginsWith(b, a), checker.Equals, true)
}
/*
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"))))
}
*/
