github.com/xfond/eth-implementation@v1.8.9-0.20180514135602-f6bc65fc6811/core/state/state_test.go (about)

     1  // Copyright 2014 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package state
    18  
    19  import (
    20  	"bytes"
    21  	"math/big"
    22  	"testing"
    23  
    24  	"github.com/ethereum/go-ethereum/common"
    25  	"github.com/ethereum/go-ethereum/crypto"
    26  	"github.com/ethereum/go-ethereum/ethdb"
    27  	checker "gopkg.in/check.v1"
    28  )
    29  
    30  type StateSuite struct {
    31  	db    *ethdb.MemDatabase
    32  	state *StateDB
    33  }
    34  
    35  var _ = checker.Suite(&StateSuite{})
    36  
    37  var toAddr = common.BytesToAddress
    38  
    39  func (s *StateSuite) TestDump(c *checker.C) {
    40  	// generate a few entries
    41  	obj1 := s.state.GetOrNewStateObject(toAddr([]byte{0x01}))
    42  	obj1.AddBalance(big.NewInt(22))
    43  	obj2 := s.state.GetOrNewStateObject(toAddr([]byte{0x01, 0x02}))
    44  	obj2.SetCode(crypto.Keccak256Hash([]byte{3, 3, 3, 3, 3, 3, 3}), []byte{3, 3, 3, 3, 3, 3, 3})
    45  	obj3 := s.state.GetOrNewStateObject(toAddr([]byte{0x02}))
    46  	obj3.SetBalance(big.NewInt(44))
    47  
    48  	// write some of them to the trie
    49  	s.state.updateStateObject(obj1)
    50  	s.state.updateStateObject(obj2)
    51  	s.state.Commit(false)
    52  
    53  	// check that dump contains the state objects that are in trie
    54  	got := string(s.state.Dump())
    55  	want := `{
    56      "root": "71edff0130dd2385947095001c73d9e28d862fc286fca2b922ca6f6f3cddfdd2",
    57      "accounts": {
    58          "0000000000000000000000000000000000000001": {
    59              "balance": "22",
    60              "nonce": 0,
    61              "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    62              "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
    63              "code": "",
    64              "storage": {}
    65          },
    66          "0000000000000000000000000000000000000002": {
    67              "balance": "44",
    68              "nonce": 0,
    69              "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    70              "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
    71              "code": "",
    72              "storage": {}
    73          },
    74          "0000000000000000000000000000000000000102": {
    75              "balance": "0",
    76              "nonce": 0,
    77              "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    78              "codeHash": "87874902497a5bb968da31a2998d8f22e949d1ef6214bcdedd8bae24cca4b9e3",
    79              "code": "03030303030303",
    80              "storage": {}
    81          }
    82      }
    83  }`
    84  	if got != want {
    85  		c.Errorf("dump mismatch:\ngot: %s\nwant: %s\n", got, want)
    86  	}
    87  }
    88  
    89  func (s *StateSuite) SetUpTest(c *checker.C) {
    90  	s.db = ethdb.NewMemDatabase()
    91  	s.state, _ = New(common.Hash{}, NewDatabase(s.db))
    92  }
    93  
    94  func (s *StateSuite) TestNull(c *checker.C) {
    95  	address := common.HexToAddress("0x823140710bf13990e4500136726d8b55")
    96  	s.state.CreateAccount(address)
    97  	//value := common.FromHex("0x823140710bf13990e4500136726d8b55")
    98  	var value common.Hash
    99  	s.state.SetState(address, common.Hash{}, value)
   100  	s.state.Commit(false)
   101  	value = s.state.GetState(address, common.Hash{})
   102  	if !common.EmptyHash(value) {
   103  		c.Errorf("expected empty hash. got %x", value)
   104  	}
   105  }
   106  
   107  func (s *StateSuite) TestSnapshot(c *checker.C) {
   108  	stateobjaddr := toAddr([]byte("aa"))
   109  	var storageaddr common.Hash
   110  	data1 := common.BytesToHash([]byte{42})
   111  	data2 := common.BytesToHash([]byte{43})
   112  
   113  	// set initial state object value
   114  	s.state.SetState(stateobjaddr, storageaddr, data1)
   115  	// get snapshot of current state
   116  	snapshot := s.state.Snapshot()
   117  
   118  	// set new state object value
   119  	s.state.SetState(stateobjaddr, storageaddr, data2)
   120  	// restore snapshot
   121  	s.state.RevertToSnapshot(snapshot)
   122  
   123  	// get state storage value
   124  	res := s.state.GetState(stateobjaddr, storageaddr)
   125  
   126  	c.Assert(data1, checker.DeepEquals, res)
   127  }
   128  
   129  func (s *StateSuite) TestSnapshotEmpty(c *checker.C) {
   130  	s.state.RevertToSnapshot(s.state.Snapshot())
   131  }
   132  
   133  // use testing instead of checker because checker does not support
   134  // printing/logging in tests (-check.vv does not work)
   135  func TestSnapshot2(t *testing.T) {
   136  	state, _ := New(common.Hash{}, NewDatabase(ethdb.NewMemDatabase()))
   137  
   138  	stateobjaddr0 := toAddr([]byte("so0"))
   139  	stateobjaddr1 := toAddr([]byte("so1"))
   140  	var storageaddr common.Hash
   141  
   142  	data0 := common.BytesToHash([]byte{17})
   143  	data1 := common.BytesToHash([]byte{18})
   144  
   145  	state.SetState(stateobjaddr0, storageaddr, data0)
   146  	state.SetState(stateobjaddr1, storageaddr, data1)
   147  
   148  	// db, trie are already non-empty values
   149  	so0 := state.getStateObject(stateobjaddr0)
   150  	so0.SetBalance(big.NewInt(42))
   151  	so0.SetNonce(43)
   152  	so0.SetCode(crypto.Keccak256Hash([]byte{'c', 'a', 'f', 'e'}), []byte{'c', 'a', 'f', 'e'})
   153  	so0.suicided = false
   154  	so0.deleted = false
   155  	state.setStateObject(so0)
   156  
   157  	root, _ := state.Commit(false)
   158  	state.Reset(root)
   159  
   160  	// and one with deleted == true
   161  	so1 := state.getStateObject(stateobjaddr1)
   162  	so1.SetBalance(big.NewInt(52))
   163  	so1.SetNonce(53)
   164  	so1.SetCode(crypto.Keccak256Hash([]byte{'c', 'a', 'f', 'e', '2'}), []byte{'c', 'a', 'f', 'e', '2'})
   165  	so1.suicided = true
   166  	so1.deleted = true
   167  	state.setStateObject(so1)
   168  
   169  	so1 = state.getStateObject(stateobjaddr1)
   170  	if so1 != nil {
   171  		t.Fatalf("deleted object not nil when getting")
   172  	}
   173  
   174  	snapshot := state.Snapshot()
   175  	state.RevertToSnapshot(snapshot)
   176  
   177  	so0Restored := state.getStateObject(stateobjaddr0)
   178  	// Update lazily-loaded values before comparing.
   179  	so0Restored.GetState(state.db, storageaddr)
   180  	so0Restored.Code(state.db)
   181  	// non-deleted is equal (restored)
   182  	compareStateObjects(so0Restored, so0, t)
   183  
   184  	// deleted should be nil, both before and after restore of state copy
   185  	so1Restored := state.getStateObject(stateobjaddr1)
   186  	if so1Restored != nil {
   187  		t.Fatalf("deleted object not nil after restoring snapshot: %+v", so1Restored)
   188  	}
   189  }
   190  
   191  func compareStateObjects(so0, so1 *stateObject, t *testing.T) {
   192  	if so0.Address() != so1.Address() {
   193  		t.Fatalf("Address mismatch: have %v, want %v", so0.address, so1.address)
   194  	}
   195  	if so0.Balance().Cmp(so1.Balance()) != 0 {
   196  		t.Fatalf("Balance mismatch: have %v, want %v", so0.Balance(), so1.Balance())
   197  	}
   198  	if so0.Nonce() != so1.Nonce() {
   199  		t.Fatalf("Nonce mismatch: have %v, want %v", so0.Nonce(), so1.Nonce())
   200  	}
   201  	if so0.data.Root != so1.data.Root {
   202  		t.Errorf("Root mismatch: have %x, want %x", so0.data.Root[:], so1.data.Root[:])
   203  	}
   204  	if !bytes.Equal(so0.CodeHash(), so1.CodeHash()) {
   205  		t.Fatalf("CodeHash mismatch: have %v, want %v", so0.CodeHash(), so1.CodeHash())
   206  	}
   207  	if !bytes.Equal(so0.code, so1.code) {
   208  		t.Fatalf("Code mismatch: have %v, want %v", so0.code, so1.code)
   209  	}
   210  
   211  	if len(so1.cachedStorage) != len(so0.cachedStorage) {
   212  		t.Errorf("Storage size mismatch: have %d, want %d", len(so1.cachedStorage), len(so0.cachedStorage))
   213  	}
   214  	for k, v := range so1.cachedStorage {
   215  		if so0.cachedStorage[k] != v {
   216  			t.Errorf("Storage key %x mismatch: have %v, want %v", k, so0.cachedStorage[k], v)
   217  		}
   218  	}
   219  	for k, v := range so0.cachedStorage {
   220  		if so1.cachedStorage[k] != v {
   221  			t.Errorf("Storage key %x mismatch: have %v, want none.", k, v)
   222  		}
   223  	}
   224  
   225  	if so0.suicided != so1.suicided {
   226  		t.Fatalf("suicided mismatch: have %v, want %v", so0.suicided, so1.suicided)
   227  	}
   228  	if so0.deleted != so1.deleted {
   229  		t.Fatalf("Deleted mismatch: have %v, want %v", so0.deleted, so1.deleted)
   230  	}
   231  }