path: root/state/state_test.go

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)
}