github.com/skoak/go-ethereum@v1.9.7/core/vm/logger_test.go (about)

     1  // Copyright 2016 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 vm
    18  
    19  import (
    20  	"math/big"
    21  	"testing"
    22  
    23  	"github.com/ethereum/go-ethereum/common"
    24  	"github.com/ethereum/go-ethereum/core/state"
    25  	"github.com/ethereum/go-ethereum/params"
    26  )
    27  
    28  type dummyContractRef struct {
    29  	calledForEach bool
    30  }
    31  
    32  func (dummyContractRef) ReturnGas(*big.Int)          {}
    33  func (dummyContractRef) Address() common.Address     { return common.Address{} }
    34  func (dummyContractRef) Value() *big.Int             { return new(big.Int) }
    35  func (dummyContractRef) SetCode(common.Hash, []byte) {}
    36  func (d *dummyContractRef) ForEachStorage(callback func(key, value common.Hash) bool) {
    37  	d.calledForEach = true
    38  }
    39  func (d *dummyContractRef) SubBalance(amount *big.Int) {}
    40  func (d *dummyContractRef) AddBalance(amount *big.Int) {}
    41  func (d *dummyContractRef) SetBalance(*big.Int)        {}
    42  func (d *dummyContractRef) SetNonce(uint64)            {}
    43  func (d *dummyContractRef) Balance() *big.Int          { return new(big.Int) }
    44  
    45  type dummyStatedb struct {
    46  	state.StateDB
    47  }
    48  
    49  func (*dummyStatedb) GetRefund() uint64 { return 1337 }
    50  
    51  func TestStoreCapture(t *testing.T) {
    52  	var (
    53  		env      = NewEVM(Context{}, &dummyStatedb{}, params.TestChainConfig, Config{})
    54  		logger   = NewStructLogger(nil)
    55  		mem      = NewMemory()
    56  		stack    = newstack()
    57  		contract = NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), 0)
    58  	)
    59  	stack.push(big.NewInt(1))
    60  	stack.push(big.NewInt(0))
    61  	var index common.Hash
    62  	logger.CaptureState(env, 0, SSTORE, 0, 0, mem, stack, contract, 0, nil)
    63  	if len(logger.changedValues[contract.Address()]) == 0 {
    64  		t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(), len(logger.changedValues[contract.Address()]))
    65  	}
    66  	exp := common.BigToHash(big.NewInt(1))
    67  	if logger.changedValues[contract.Address()][index] != exp {
    68  		t.Errorf("expected %x, got %x", exp, logger.changedValues[contract.Address()][index])
    69  	}
    70  }