1 files changed, 104 insertions, 0 deletions
diff --git a/core/vm/logger_test.go b/core/vm/logger_test.go
new file mode 100644
index 000000000..77fee2c64
--- /dev/null
+++ b/core/vm/logger_test.go
@@ -0,0 +1,104 @@
+// 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 vm
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
+type dummyContractRef struct {
+	calledForEach bool
+}
+
+func (dummyContractRef) ReturnGas(*big.Int, *big.Int) {}
+func (dummyContractRef) Address() common.Address      { return common.Address{} }
+func (dummyContractRef) Value() *big.Int              { return new(big.Int) }
+func (dummyContractRef) SetCode([]byte)               {}
+func (d *dummyContractRef) ForEachStorage(callback func(key, value common.Hash) bool) {
+	d.calledForEach = true
+}
+func (d *dummyContractRef) SubBalance(amount *big.Int) {}
+func (d *dummyContractRef) AddBalance(amount *big.Int) {}
+func (d *dummyContractRef) SetBalance(*big.Int)        {}
+func (d *dummyContractRef) SetNonce(uint64)            {}
+func (d *dummyContractRef) Balance() *big.Int          { return new(big.Int) }
+
+type dummyEnv struct {
+	*Env
+	ref *dummyContractRef
+}
+
+func newDummyEnv(ref *dummyContractRef) *dummyEnv {
+	return &dummyEnv{
+		Env: NewEnv(),
+		ref: ref,
+	}
+}
+func (d dummyEnv) GetAccount(common.Address) Account {
+	return d.ref
+}
+func (d dummyEnv) AddStructLog(StructLog) {}
+
+func TestStoreCapture(t *testing.T) {
+	var (
+		env      = NewEnv()
+		logger   = newLogger(LogConfig{Collector: env}, env)
+		mem      = NewMemory()
+		stack    = newstack()
+		contract = NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), new(big.Int), new(big.Int))
+	)
+	stack.push(big.NewInt(1))
+	stack.push(big.NewInt(0))
+
+	var index common.Hash
+
+	logger.captureState(0, SSTORE, new(big.Int), new(big.Int), mem, stack, contract, nil)
+	if len(logger.changedValues[contract.Address()]) == 0 {
+		t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(), len(logger.changedValues[contract.Address()]))
+	}
+
+	exp := common.BigToHash(big.NewInt(1))
+	if logger.changedValues[contract.Address()][index] != exp {
+		t.Errorf("expected %x, got %x", exp, logger.changedValues[contract.Address()][index])
+	}
+}
+
+func TestStorageCapture(t *testing.T) {
+	t.Skip("implementing this function is difficult. it requires all sort of interfaces to be implemented which isn't trivial. The value (the actual test) isn't worth it")
+	var (
+		ref      = &dummyContractRef{}
+		contract = NewContract(ref, ref, new(big.Int), new(big.Int), new(big.Int))
+		env      = newDummyEnv(ref)
+		logger   = newLogger(LogConfig{Collector: env}, env)
+		mem      = NewMemory()
+		stack    = newstack()
+	)
+
+	logger.captureState(0, STOP, new(big.Int), new(big.Int), mem, stack, contract, nil)
+	if ref.calledForEach {
+		t.Error("didn't expect for each to be called")
+	}
+
+	logger = newLogger(LogConfig{Collector: env, FullStorage: true}, env)
+	logger.captureState(0, STOP, new(big.Int), new(big.Int), mem, stack, contract, nil)
+	if !ref.calledForEach {
+		t.Error("expected for each to be called")
+	}
+}