From 5a86892ecbd68c3d466cb1ef282c4cb81300abce Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Mon, 30 Jun 2014 13:08:00 +0200
Subject: Using remote for test cases

---
 ethutil/trie.go      |  17 ++++++--
 ethutil/trie_test.go | 108 ++++++++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 108 insertions(+), 17 deletions(-)

diff --git a/ethutil/trie.go b/ethutil/trie.go
index 18d0a5f0a..ce9c2da27 100644
--- a/ethutil/trie.go
+++ b/ethutil/trie.go
@@ -43,11 +43,11 @@ func NewCache(db Database) *Cache {
 	return &Cache{db: db, nodes: make(map[string]*Node)}
 }
 
-func (cache *Cache) Put(v interface{}) interface{} {
+func (cache *Cache) PutValue(v interface{}, force bool) interface{} {
 	value := NewValue(v)
 
 	enc := value.Encode()
-	if len(enc) >= 32 {
+	if len(enc) >= 32 || force {
 		sha := Sha3Bin(enc)
 
 		cache.nodes[string(sha)] = NewNode(sha, value, true)
@@ -59,6 +59,10 @@ func (cache *Cache) Put(v interface{}) interface{} {
 	return v
 }
 
+func (cache *Cache) Put(v interface{}) interface{} {
+	return cache.PutValue(v, false)
+}
+
 func (cache *Cache) Get(key []byte) *Value {
 	// First check if the key is the cache
 	if cache.nodes[string(key)] != nil {
@@ -168,7 +172,12 @@ func (t *Trie) Update(key string, value string) {
 
 	k := CompactHexDecode(key)
 
-	t.Root = t.UpdateState(t.Root, k, value)
+	root := t.UpdateState(t.Root, k, value)
+	if _, ok := root.([]byte); !ok {
+		t.Root = t.cache.PutValue(root, true)
+	} else {
+		t.Root = root
+	}
 }
 
 func (t *Trie) Get(key string) string {
@@ -527,6 +536,8 @@ func (it *TrieIterator) fetchNode(key []int, node []byte, cb EachCallback) {
 }
 
 func (it *TrieIterator) iterateNode(key []int, currentNode *Value, cb EachCallback) {
+	//fmt.Println("node", currentNode)
+
 	if currentNode.Len() == 2 {
 		k := CompactDecode(currentNode.Get(0).Str())
 
diff --git a/ethutil/trie_test.go b/ethutil/trie_test.go
index 2937b1525..3ee955b11 100644
--- a/ethutil/trie_test.go
+++ b/ethutil/trie_test.go
@@ -1,7 +1,12 @@
 package ethutil
 
 import (
+	"bytes"
+	"encoding/hex"
+	"encoding/json"
 	"fmt"
+	"io/ioutil"
+	"net/http"
 	"reflect"
 	"testing"
 )
@@ -171,23 +176,98 @@ func TestTriePurge(t *testing.T) {
 	}
 }
 
-func TestTrieIt(t *testing.T) {
-	_, trie := New()
+func h(str string) string {
+	d, err := hex.DecodeString(str)
+	if err != nil {
+		panic(err)
+	}
+
+	return string(d)
+}
 
-	data := [][]string{
-		{"do", "verb"},
-		{"ether", "wookiedoo"},
-		{"horse", "stallion"},
-		{"shaman", "horse"},
-		{"doge", "coin"},
-		{"ether", ""},
-		{"dog", "puppy"},
-		{"shaman", ""},
+func get(in string) (out string) {
+	if len(in) > 2 && in[:2] == "0x" {
+		out = h(in[2:])
+	} else {
+		out = in
 	}
 
-	for _, item := range data {
-		trie.Update(item[0], item[1])
+	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)
 	}
 
-	fmt.Printf("root %x", trie.Root)
+	return t, nil
+}
+
+func CreateTests(uri string, cb func(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)
+	}
+
+	for name, testData := range objmap {
+		test, err := CreateTest(name, *testData)
+		if err != nil {
+			panic(err)
+		}
+
+		cb(test)
+	}
+}
+
+func TestRemote(t *testing.T) {
+	CreateTests("https://raw.githubusercontent.com/ethereum/tests/develop/trietest.json", func(test Test) {
+		_, trie := New()
+		for key, value := range test.In {
+			trie.Update(get(key), get(value))
+		}
+		fmt.Printf("%-15s: %x\n", test.Name, trie.Root)
+
+		a := NewValue(h(test.Root)).Bytes()
+		b := NewValue(trie.Root).Bytes()
+		if bytes.Compare(a, b) != 0 {
+			t.Errorf("%-10s: %x %x", test.Name, a, b)
+		}
+	})
+}
+
+func TestTrieReplay(t *testing.T) {
+	CreateTests("https://raw.githubusercontent.com/ethereum/tests/develop/trietest.json", func(test Test) {
+		_, trie := New()
+		for key, value := range test.In {
+			trie.Update(get(key), get(value))
+		}
+
+		_, trie2 := New()
+		trie.NewIterator().Each(func(key string, v *Value) {
+			trie2.Update(key, string(v.Str()))
+		})
+
+		a := NewValue(trie.Root).Bytes()
+		b := NewValue(trie2.Root).Bytes()
+		if bytes.Compare(a, b) != 0 {
+			t.Errorf("root %x %x\n", trie.Root, trie2.Root)
+		}
+	})
 }
-- 
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