From 49437a02c981199c62048fae00c6b80976f6e6b9 Mon Sep 17 00:00:00 2001
From: gary rong <garyrong0905@gmail.com>
Date: Wed, 5 Apr 2017 06:44:16 +0800
Subject: [PATCH] core/state: make TestSnapshotRandom work again (#3816)

In `touch` operation, only `touched` filed has been changed. Therefore
in the related undo function, only `touched` field should be reverted.
In addition, whether remove this obj from dirty map should depend on
prevDirty flag.
---
 core/state/journal.go      | 7 +++++--
 core/state/state_object.go | 5 +++--
 core/state/statedb_test.go | 1 -
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/core/state/journal.go b/core/state/journal.go
index 5cd41477d9..73218dd283 100644
--- a/core/state/journal.go
+++ b/core/state/journal.go
@@ -73,6 +73,7 @@ type (
 	touchChange struct {
 		account *common.Address
 		prev    bool
+		prevDirty bool
 	}
 )
 
@@ -97,8 +98,10 @@ var ripemd = common.HexToAddress("0000000000000000000000000000000000000003")
 
 func (ch touchChange) undo(s *StateDB) {
 	if !ch.prev && *ch.account != ripemd {
-		delete(s.stateObjects, *ch.account)
-		delete(s.stateObjectsDirty, *ch.account)
+		s.getStateObject(*ch.account).touched = ch.prev
+		if !ch.prevDirty {
+			delete(s.stateObjectsDirty, *ch.account)
+		}
 	}
 }
 
diff --git a/core/state/state_object.go b/core/state/state_object.go
index 7f994ee6d6..7d33153037 100644
--- a/core/state/state_object.go
+++ b/core/state/state_object.go
@@ -137,8 +137,9 @@ func (self *stateObject) markSuicided() {
 
 func (c *stateObject) touch() {
 	c.db.journal = append(c.db.journal, touchChange{
-		account: &c.address,
-		prev:    c.touched,
+		account:   &c.address,
+		prev:      c.touched,
+		prevDirty: c.onDirty == nil,
 	})
 	if c.onDirty != nil {
 		c.onDirty(c.Address())
diff --git a/core/state/statedb_test.go b/core/state/statedb_test.go
index 597de3be53..72b638f970 100644
--- a/core/state/statedb_test.go
+++ b/core/state/statedb_test.go
@@ -116,7 +116,6 @@ func TestIntermediateLeaks(t *testing.T) {
 }
 
 func TestSnapshotRandom(t *testing.T) {
-	t.Skip("@fjl fix me please")
 	config := &quick.Config{MaxCount: 1000}
 	err := quick.Check((*snapshotTest).run, config)
 	if cerr, ok := err.(*quick.CheckError); ok {