laconicd/state/ethdb_test.go

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package state
// NOTE: A bulk of these unit tests will change and evolve as the context and
// implementation of ChainConext evolves.
import (
"fmt"
"testing"
ethdb "github.com/ethereum/go-ethereum/ethdb"
"github.com/stretchr/testify/require"
dbm "github.com/tendermint/tendermint/libs/db"
)
type (
kvPair struct {
key, value []byte
}
)
func newEthereumDB() *EthereumDB {
memDB := dbm.NewMemDB()
return &EthereumDB{CodeDB: memDB}
}
func TestEthereumDBInterface(t *testing.T) {
require.Implements(t, (*ethdb.Database)(nil), new(EthereumDB))
require.Implements(t, (*ethdb.Batch)(nil), new(EthereumDB))
}
func TestEthereumDBGet(t *testing.T) {
testEDB := newEthereumDB()
testCases := []struct {
edb *EthereumDB
data *kvPair
key []byte
expectedValue []byte
}{
{
edb: testEDB,
key: []byte("foo"),
expectedValue: nil,
},
{
edb: testEDB,
data: &kvPair{[]byte("foo"), []byte("bar")},
key: []byte("foo"),
expectedValue: []byte("bar"),
},
}
for i, tc := range testCases {
if tc.data != nil {
tc.edb.Put(tc.data.key, tc.data.value)
}
value, err := tc.edb.Get(tc.key)
require.Nil(t, err, fmt.Sprintf("unexpected error: test case #%d", i))
require.Equal(t, tc.expectedValue, value, fmt.Sprintf("unexpected result: test case #%d", i))
}
}
func TestEthereumDBHas(t *testing.T) {
testEDB := newEthereumDB()
testCases := []struct {
edb *EthereumDB
data *kvPair
key []byte
expectedValue bool
}{
{
edb: testEDB,
key: []byte("foo"),
expectedValue: false,
},
{
edb: testEDB,
data: &kvPair{[]byte("foo"), []byte("bar")},
key: []byte("foo"),
expectedValue: true,
},
}
for i, tc := range testCases {
if tc.data != nil {
tc.edb.Put(tc.data.key, tc.data.value)
}
ok, err := tc.edb.Has(tc.key)
require.Nil(t, err, fmt.Sprintf("unexpected error: test case #%d", i))
require.Equal(t, tc.expectedValue, ok, fmt.Sprintf("unexpected result: test case #%d", i))
}
}
func TestEthereumDBDelete(t *testing.T) {
testEDB := newEthereumDB()
testCases := []struct {
edb *EthereumDB
data *kvPair
key []byte
}{
{
edb: testEDB,
key: []byte("foo"),
},
{
edb: testEDB,
data: &kvPair{[]byte("foo"), []byte("bar")},
key: []byte("foo"),
},
}
for i, tc := range testCases {
if tc.data != nil {
tc.edb.Put(tc.data.key, tc.data.value)
}
err := tc.edb.Delete(tc.key)
ok, _ := tc.edb.Has(tc.key)
require.Nil(t, err, fmt.Sprintf("unexpected error: test case #%d", i))
require.False(t, ok, fmt.Sprintf("unexpected existence of key: test case #%d", i))
}
}
func TestEthereumDBNewBatch(t *testing.T) {
edb := newEthereumDB()
batch := edb.NewBatch()
require.Equal(t, edb, batch)
}
func TestEthereumDBValueSize(t *testing.T) {
edb := newEthereumDB()
size := edb.ValueSize()
require.Equal(t, 0, size)
}
func TestEthereumDBWrite(t *testing.T) {
edb := newEthereumDB()
err := edb.Write()
require.Nil(t, err)
}