package kvdb import ( "fmt" "io/ioutil" "os" "testing" "github.com/hermeznetwork/hermez-node/common" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func addTestKV(t *testing.T, db *KVDB, k, v []byte) { tx, err := db.db.NewTx() require.NoError(t, err) err = tx.Put(k, v) require.NoError(t, err) err = tx.Commit() require.NoError(t, err) } func printCheckpoints(t *testing.T, path string) { files, err := ioutil.ReadDir(path) require.NoError(t, err) fmt.Println(path) for _, f := range files { fmt.Println(" " + f.Name()) } } func TestCheckpoints(t *testing.T) { dir, err := ioutil.TempDir("", "sdb") require.NoError(t, err) defer require.NoError(t, os.RemoveAll(dir)) db, err := NewKVDB(dir, 128) require.NoError(t, err) // add test key-values for i := 0; i < 10; i++ { addTestKV(t, db, []byte{byte(i), byte(i)}, []byte{byte(i * 2), byte(i * 2)}) } // do checkpoints and check that currentBatch is correct err = db.MakeCheckpoint() require.NoError(t, err) cb, err := db.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(1), cb) for i := 1; i < 10; i++ { err = db.MakeCheckpoint() require.NoError(t, err) cb, err = db.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(i+1), cb) } // printCheckpoints(t, db.path) // reset checkpoint err = db.Reset(3) require.NoError(t, err) // check that reset can be repeated (as there exist the 'current' and // 'BatchNum3', from where the 'current' is a copy) err = db.Reset(3) require.NoError(t, err) printCheckpoints(t, db.path) // check that currentBatch is as expected after Reset cb, err = db.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(3), cb) // advance one checkpoint and check that currentBatch is fine err = db.MakeCheckpoint() require.NoError(t, err) cb, err = db.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(4), cb) err = db.DeleteCheckpoint(common.BatchNum(1)) require.NoError(t, err) err = db.DeleteCheckpoint(common.BatchNum(2)) require.NoError(t, err) err = db.DeleteCheckpoint(common.BatchNum(1)) // does not exist, should return err assert.NotNil(t, err) err = db.DeleteCheckpoint(common.BatchNum(2)) // does not exist, should return err assert.NotNil(t, err) // Create a new KVDB which will get Reset from the initial KVDB dirLocal, err := ioutil.TempDir("", "ldb") require.NoError(t, err) defer require.NoError(t, os.RemoveAll(dirLocal)) ldb, err := NewKVDB(dirLocal, 128) require.NoError(t, err) // get checkpoint 4 from sdb (StateDB) to ldb (LocalStateDB) err = ldb.ResetFromSynchronizer(4, db) require.NoError(t, err) // check that currentBatch is 4 after the Reset cb, err = ldb.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(4), cb) // advance one checkpoint in ldb err = ldb.MakeCheckpoint() require.NoError(t, err) cb, err = ldb.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(5), cb) // Create a 3rd KVDB which will get Reset from the initial KVDB dirLocal2, err := ioutil.TempDir("", "ldb2") require.NoError(t, err) defer require.NoError(t, os.RemoveAll(dirLocal2)) ldb2, err := NewKVDB(dirLocal2, 128) require.NoError(t, err) // get checkpoint 4 from sdb (StateDB) to ldb (LocalStateDB) err = ldb2.ResetFromSynchronizer(4, db) require.NoError(t, err) // check that currentBatch is 4 after the Reset cb, err = ldb2.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(4), cb) // advance one checkpoint in ldb2 err = ldb2.MakeCheckpoint() require.NoError(t, err) cb, err = ldb2.GetCurrentBatch() require.NoError(t, err) assert.Equal(t, common.BatchNum(5), cb) debug := false if debug { printCheckpoints(t, db.path) printCheckpoints(t, ldb.path) printCheckpoints(t, ldb2.path) } } func TestListCheckpoints(t *testing.T) { dir, err := ioutil.TempDir("", "tmpdb") require.NoError(t, err) defer require.NoError(t, os.RemoveAll(dir)) db, err := NewKVDB(dir, 128) require.NoError(t, err) numCheckpoints := 16 // do checkpoints for i := 0; i < numCheckpoints; i++ { err = db.MakeCheckpoint() require.NoError(t, err) } list, err := db.ListCheckpoints() require.NoError(t, err) assert.Equal(t, numCheckpoints, len(list)) assert.Equal(t, 1, list[0]) assert.Equal(t, numCheckpoints, list[len(list)-1]) numReset := 10 err = db.Reset(common.BatchNum(numReset)) require.NoError(t, err) list, err = db.ListCheckpoints() require.NoError(t, err) assert.Equal(t, numReset, len(list)) assert.Equal(t, 1, list[0]) assert.Equal(t, numReset, list[len(list)-1]) } func TestDeleteOldCheckpoints(t *testing.T) { dir, err := ioutil.TempDir("", "tmpdb") require.NoError(t, err) defer require.NoError(t, os.RemoveAll(dir)) keep := 16 db, err := NewKVDB(dir, keep) require.NoError(t, err) numCheckpoints := 32 // do checkpoints and check that we never have more than `keep` // checkpoints for i := 0; i < numCheckpoints; i++ { err = db.MakeCheckpoint() require.NoError(t, err) checkpoints, err := db.ListCheckpoints() require.NoError(t, err) assert.LessOrEqual(t, len(checkpoints), keep) } }