core: vm: add GovernanceStateHelper test

2 files changed, 98 insertions, 0 deletions

diff --git a/core/vm/governance.go b/core/vm/governance.go
index 0cca0f409..3583e0cc1 100644
--- a/core/vm/governance.go
+++ b/core/vm/governance.go
@@ -1,3 +1,20 @@
+// Copyright 2018 The dexon-consensus-core Authors
+// This file is part of the dexon-consensus-core library.
+//
+// The dexon-consensus-core 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 dexon-consensus-core 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 dexon-consensus-core library. If not, see
+// <http://www.gnu.org/licenses/>.
+
 package vm
 
 import (
diff --git a/core/vm/governance_test.go b/core/vm/governance_test.go
new file mode 100644
index 000000000..5f6d38a50
--- /dev/null
+++ b/core/vm/governance_test.go
@@ -0,0 +1,81 @@
+// Copyright 2018 The dexon-consensus-core Authors
+// This file is part of the dexon-consensus-core library.
+//
+// The dexon-consensus-core 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 dexon-consensus-core 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 dexon-consensus-core library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+package vm
+
+import (
+	"bytes"
+	"math/big"
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/dexon-foundation/dexon/common"
+	"github.com/dexon-foundation/dexon/core/state"
+	"github.com/dexon-foundation/dexon/ethdb"
+	"github.com/stretchr/testify/suite"
+)
+
+func init() {
+	rand.Seed(time.Now().UnixNano())
+}
+
+func randomBytes(minLength, maxLength int32) []byte {
+	length := rand.Int31()%(maxLength-minLength) + minLength
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = byte(65 + rand.Int31()%60)
+	}
+	return b
+}
+
+type GovernanceStateHelperTestSuite struct {
+	suite.Suite
+
+	s *GovernanceStateHelper
+}
+
+func (g *GovernanceStateHelperTestSuite) SetupTest() {
+	db := state.NewDatabase(ethdb.NewMemDatabase())
+	statedb, err := state.New(common.Hash{}, db)
+	if err != nil {
+		panic(err)
+	}
+	g.s = &GovernanceStateHelper{statedb}
+}
+
+func (g *GovernanceStateHelperTestSuite) TestReadWriteBytes() {
+	for i := 0; i < 100; i++ {
+		// Short bytes.
+		loc := big.NewInt(rand.Int63())
+		data := randomBytes(3, 32)
+		g.s.writeBytes(loc, data)
+		read := g.s.readBytes(loc)
+		g.Require().Equal(0, bytes.Compare(data, read))
+
+		// long bytes.
+		loc = big.NewInt(rand.Int63())
+		data = randomBytes(33, 2560)
+		g.s.writeBytes(loc, data)
+		read = g.s.readBytes(loc)
+		g.Require().Equal(0, bytes.Compare(data, read))
+	}
+}
+
+func TestGovernanceStateHelper(t *testing.T) {
+	suite.Run(t, new(GovernanceStateHelperTestSuite))
+}