package state import ( "math/big" checker "gopkg.in/check.v1" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/ethdb" ) type StateSuite struct { state *StateDB } var _ = checker.Suite(&StateSuite{}) var toAddr = common.BytesToAddress func (s *StateSuite) TestDump(c *checker.C) { return // generate a few entries obj1 := s.state.GetOrNewStateObject(toAddr([]byte{0x01})) obj1.AddBalance(big.NewInt(22)) obj2 := s.state.GetOrNewStateObject(toAddr([]byte{0x01, 0x02})) obj2.SetCode([]byte{3, 3, 3, 3, 3, 3, 3}) obj3 := s.state.GetOrNewStateObject(toAddr([]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": "6e277ae8357d013e50f74eedb66a991f6922f93ae03714de58b3d0c5e9eee53f", "accounts": { "1468288056310c82aa4c01a7e12a10f8111a0560e72b700555479031b86c357d": { "balance": "22", "nonce": 0, "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421", "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "storage": {} }, "a17eacbc25cda025e81db9c5c62868822c73ce097cee2a63e33a2e41268358a1": { "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) { db, _ := ethdb.NewMemDatabase() s.state = New(nil, db) } func (s *StateSuite) TestSnapshot(c *checker.C) { stateobjaddr := toAddr([]byte("aa")) storageaddr := common.Big("0") data1 := common.NewValue(42) data2 := common.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) }