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package state
import (
"math/big"
checker "gopkg.in/check.v1"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/common"
)
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": "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 := []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)
}
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