148 lines
4.7 KiB
Go
148 lines
4.7 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethapi
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import (
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"errors"
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"math/big"
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"reflect"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/params"
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)
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type account struct{}
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func (account) SubBalance(amount *big.Int) {}
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func (account) AddBalance(amount *big.Int) {}
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func (account) SetAddress(common.Address) {}
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func (account) Value() *big.Int { return nil }
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func (account) SetBalance(*big.Int) {}
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func (account) SetNonce(uint64) {}
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func (account) Balance() *big.Int { return nil }
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func (account) Address() common.Address { return common.Address{} }
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func (account) ReturnGas(*big.Int) {}
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func (account) SetCode(common.Hash, []byte) {}
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func (account) ForEachStorage(cb func(key, value common.Hash) bool) {}
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func runTrace(tracer *JavascriptTracer) (interface{}, error) {
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env := vm.NewEVM(vm.Context{}, nil, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer})
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contract := vm.NewContract(account{}, account{}, big.NewInt(0), big.NewInt(10000))
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contract.Code = []byte{byte(vm.PUSH1), 0x1, byte(vm.PUSH1), 0x1, 0x0}
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_, err := env.Interpreter().Run(contract, []byte{})
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if err != nil {
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return nil, err
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}
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return tracer.GetResult()
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}
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func TestTracing(t *testing.T) {
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tracer, err := NewJavascriptTracer("{count: 0, step: function() { this.count += 1; }, result: function() { return this.count; }}")
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if err != nil {
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t.Fatal(err)
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}
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ret, err := runTrace(tracer)
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if err != nil {
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t.Fatal(err)
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}
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value, ok := ret.(float64)
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if !ok {
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t.Errorf("Expected return value to be float64, was %T", ret)
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}
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if value != 3 {
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t.Errorf("Expected return value to be 3, got %v", value)
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}
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}
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func TestStack(t *testing.T) {
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tracer, err := NewJavascriptTracer("{depths: [], step: function(log) { this.depths.push(log.stack.length()); }, result: function() { return this.depths; }}")
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if err != nil {
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t.Fatal(err)
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}
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ret, err := runTrace(tracer)
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if err != nil {
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t.Fatal(err)
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}
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expected := []int{0, 1, 2}
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if !reflect.DeepEqual(ret, expected) {
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t.Errorf("Expected return value to be %#v, got %#v", expected, ret)
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}
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}
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func TestOpcodes(t *testing.T) {
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tracer, err := NewJavascriptTracer("{opcodes: [], step: function(log) { this.opcodes.push(log.op.toString()); }, result: function() { return this.opcodes; }}")
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if err != nil {
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t.Fatal(err)
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}
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ret, err := runTrace(tracer)
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if err != nil {
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t.Fatal(err)
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}
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expected := []string{"PUSH1", "PUSH1", "STOP"}
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if !reflect.DeepEqual(ret, expected) {
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t.Errorf("Expected return value to be %#v, got %#v", expected, ret)
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}
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}
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func TestHalt(t *testing.T) {
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timeout := errors.New("stahp")
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tracer, err := NewJavascriptTracer("{step: function() { while(1); }, result: function() { return null; }}")
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if err != nil {
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t.Fatal(err)
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}
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go func() {
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time.Sleep(1 * time.Second)
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tracer.Stop(timeout)
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}()
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if _, err = runTrace(tracer); err.Error() != "stahp in server-side tracer function 'step'" {
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t.Errorf("Expected timeout error, got %v", err)
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}
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}
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func TestHaltBetweenSteps(t *testing.T) {
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tracer, err := NewJavascriptTracer("{step: function() {}, result: function() { return null; }}")
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if err != nil {
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t.Fatal(err)
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}
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env := vm.NewEVM(vm.Context{}, nil, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer})
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contract := vm.NewContract(&account{}, &account{}, big.NewInt(0), big.NewInt(0))
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tracer.CaptureState(env, 0, 0, big.NewInt(0), big.NewInt(0), nil, nil, contract, 0, nil)
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timeout := errors.New("stahp")
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tracer.Stop(timeout)
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tracer.CaptureState(env, 0, 0, big.NewInt(0), big.NewInt(0), nil, nil, contract, 0, nil)
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if _, err := tracer.GetResult(); err.Error() != "stahp in server-side tracer function 'step'" {
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t.Errorf("Expected timeout error, got %v", err)
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}
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}
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