diff options
Diffstat (limited to 'eth/tracers/tracer_test.go')
| -rw-r--r-- | eth/tracers/tracer_test.go | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/eth/tracers/tracer_test.go b/eth/tracers/tracer_test.go new file mode 100644 index 000000000..7224a1489 --- /dev/null +++ b/eth/tracers/tracer_test.go @@ -0,0 +1,140 @@ +// Copyright 2016 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package tracers + +import ( + "bytes" + "encoding/json" + "errors" + "math/big" + "testing" + "time" + + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core/vm" + "github.com/ethereum/go-ethereum/params" +) + +type account struct{} + +func (account) SubBalance(amount *big.Int) {} +func (account) AddBalance(amount *big.Int) {} +func (account) SetAddress(common.Address) {} +func (account) Value() *big.Int { return nil } +func (account) SetBalance(*big.Int) {} +func (account) SetNonce(uint64) {} +func (account) Balance() *big.Int { return nil } +func (account) Address() common.Address { return common.Address{} } +func (account) ReturnGas(*big.Int) {} +func (account) SetCode(common.Hash, []byte) {} +func (account) ForEachStorage(cb func(key, value common.Hash) bool) {} + +func runTrace(tracer *Tracer) (json.RawMessage, error) { + env := vm.NewEVM(vm.Context{BlockNumber: big.NewInt(1)}, nil, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer}) + + contract := vm.NewContract(account{}, account{}, big.NewInt(0), 10000) + contract.Code = []byte{byte(vm.PUSH1), 0x1, byte(vm.PUSH1), 0x1, 0x0} + + _, err := env.Interpreter().Run(contract, []byte{}) + if err != nil { + return nil, err + } + return tracer.GetResult() +} + +func TestTracing(t *testing.T) { + tracer, err := New("{count: 0, step: function() { this.count += 1; }, fault: function() {}, result: function() { return this.count; }}") + if err != nil { + t.Fatal(err) + } + + ret, err := runTrace(tracer) + if err != nil { + t.Fatal(err) + } + if !bytes.Equal(ret, []byte("3")) { + t.Errorf("Expected return value to be 3, got %s", string(ret)) + } +} + +func TestStack(t *testing.T) { + tracer, err := New("{depths: [], step: function(log) { this.depths.push(log.stack.length()); }, fault: function() {}, result: function() { return this.depths; }}") + if err != nil { + t.Fatal(err) + } + + ret, err := runTrace(tracer) + if err != nil { + t.Fatal(err) + } + if !bytes.Equal(ret, []byte("[0,1,2]")) { + t.Errorf("Expected return value to be [0,1,2], got %s", string(ret)) + } +} + +func TestOpcodes(t *testing.T) { + tracer, err := New("{opcodes: [], step: function(log) { this.opcodes.push(log.op.toString()); }, fault: function() {}, result: function() { return this.opcodes; }}") + if err != nil { + t.Fatal(err) + } + + ret, err := runTrace(tracer) + if err != nil { + t.Fatal(err) + } + if !bytes.Equal(ret, []byte("[\"PUSH1\",\"PUSH1\",\"STOP\"]")) { + t.Errorf("Expected return value to be [\"PUSH1\",\"PUSH1\",\"STOP\"], got %s", string(ret)) + } +} + +func TestHalt(t *testing.T) { + t.Skip("duktape doesn't support abortion") + + timeout := errors.New("stahp") + tracer, err := New("{step: function() { while(1); }, result: function() { return null; }}") + if err != nil { + t.Fatal(err) + } + + go func() { + time.Sleep(1 * time.Second) + tracer.Stop(timeout) + }() + + if _, err = runTrace(tracer); err.Error() != "stahp in server-side tracer function 'step'" { + t.Errorf("Expected timeout error, got %v", err) + } +} + +func TestHaltBetweenSteps(t *testing.T) { + tracer, err := New("{step: function() {}, fault: function() {}, result: function() { return null; }}") + if err != nil { + t.Fatal(err) + } + + env := vm.NewEVM(vm.Context{BlockNumber: big.NewInt(1)}, nil, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer}) + contract := vm.NewContract(&account{}, &account{}, big.NewInt(0), 0) + + tracer.CaptureState(env, 0, 0, 0, 0, nil, nil, contract, 0, nil) + timeout := errors.New("stahp") + tracer.Stop(timeout) + tracer.CaptureState(env, 0, 0, 0, 0, nil, nil, contract, 0, nil) + + if _, err := tracer.GetResult(); err.Error() != timeout.Error() { + t.Errorf("Expected timeout error, got %v", err) + } +} |