1 files changed, 91 insertions, 0 deletions
diff --git a/state/state_test.go b/state/state_test.go
new file mode 100644
index 000000000..ee1cf9286
--- /dev/null
+++ b/state/state_test.go
@@ -0,0 +1,91 @@
+package state
+
+import (
+	"math/big"
+
+	checker "gopkg.in/check.v1"
+
+	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+type StateSuite struct {
+	state *StateDB
+}
+
+var _ = checker.Suite(&StateSuite{})
+
+// var ZeroHash256 = make([]byte, 32)
+
+func (s *StateSuite) TestDump(c *checker.C) {
+	// generate a few entries
+	obj1 := s.state.GetOrNewStateObject([]byte{0x01})
+	obj1.AddBalance(big.NewInt(22))
+	obj2 := s.state.GetOrNewStateObject([]byte{0x01, 0x02})
+	obj2.SetCode([]byte{3, 3, 3, 3, 3, 3, 3})
+	obj3 := s.state.GetOrNewStateObject([]byte{0x02})
+	obj3.SetBalance(big.NewInt(44))
+
+	// write some of them to the trie
+	s.state.UpdateStateObject(obj1)
+	s.state.UpdateStateObject(obj2)
+
+	// check that dump contains the state objects that are in trie
+	got := string(s.state.Dump())
+	want := `{
+    "root": "4e3a59299745ba6752247c8b91d0f716dac9ec235861c91f5ac1894a361d87ba",
+    "accounts": {
+        "0000000000000000000000000000000000000001": {
+            "balance": "22",
+            "nonce": 0,
+            "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+            "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
+            "storage": {}
+        },
+        "0000000000000000000000000000000000000102": {
+            "balance": "0",
+            "nonce": 0,
+            "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+            "codeHash": "87874902497a5bb968da31a2998d8f22e949d1ef6214bcdedd8bae24cca4b9e3",
+            "storage": {}
+        }
+    }
+}`
+	if got != want {
+		c.Errorf("dump mismatch:\ngot: %s\nwant: %s\n", got, want)
+	}
+}
+
+func (s *StateSuite) SetUpTest(c *checker.C) {
+	ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
+	db, _ := ethdb.NewMemDatabase()
+	s.state = New(nil, db)
+}
+
+func (s *StateSuite) TestSnapshot(c *checker.C) {
+	stateobjaddr := []byte("aa")
+	storageaddr := ethutil.Big("0")
+	data1 := ethutil.NewValue(42)
+	data2 := ethutil.NewValue(43)
+
+	// get state object
+	stateObject := s.state.GetOrNewStateObject(stateobjaddr)
+	// set inital state object value
+	stateObject.SetStorage(storageaddr, data1)
+	// get snapshot of current state
+	snapshot := s.state.Copy()
+
+	// get state object. is this strictly necessary?
+	stateObject = s.state.GetStateObject(stateobjaddr)
+	// set new state object value
+	stateObject.SetStorage(storageaddr, data2)
+	// restore snapshot
+	s.state.Set(snapshot)
+
+	// get state object
+	stateObject = s.state.GetStateObject(stateobjaddr)
+	// get state storage value
+	res := stateObject.GetStorage(storageaddr)
+
+	c.Assert(data1, checker.DeepEquals, res)
+}