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tx_test.go
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tx_test.go
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// Copyright (c) 2014 Couchbase, Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
package forestdb
import (
"os"
"reflect"
"testing"
)
func lookupKeyInTest(key []byte) ([]byte, error) {
dbfile, err := Open("test", nil)
if err != nil {
return nil, err
}
defer dbfile.Close()
kvstore, err := dbfile.OpenKVStoreDefault(nil)
if err != nil {
return nil, err
}
defer kvstore.Close()
return kvstore.GetKV(key)
}
func TestTx(t *testing.T) {
defer os.RemoveAll("test")
dbfile, err := Open("test", nil)
if err != nil {
t.Fatal(err)
}
defer dbfile.Close()
kvstore, err := dbfile.OpenKVStoreDefault(nil)
if err != nil {
t.Fatal(err)
}
defer kvstore.Close()
// first set a value with no tx
err = kvstore.SetKV([]byte("a"), []byte("a"))
if err != nil {
t.Fatal(err)
}
// make sure another reader can see it immediately
val, err := lookupKeyInTest([]byte("a"))
if err != nil || !reflect.DeepEqual(val, []byte("a")) {
t.Errorf("expected to see a, got % x - %v", val, err)
}
// now start a read-committed tx
err = dbfile.BeginTransaction(ISOLATION_READ_COMMITTED)
if err != nil {
t.Fatal(err)
}
err = kvstore.SetKV([]byte("b"), []byte("b"))
if err != nil {
t.Fatal(err)
}
// reader can't see this, tx in progress
val, err = lookupKeyInTest([]byte("b"))
if err != RESULT_KEY_NOT_FOUND {
t.Errorf("expected not see b, tx in progress")
}
err = dbfile.EndTransaction(COMMIT_NORMAL)
if err != nil {
t.Fatal(err)
}
// expect to see it after commit transaction
val, err = lookupKeyInTest([]byte("b"))
if err != nil || !reflect.DeepEqual(val, []byte("b")) {
t.Errorf("expected after tx to see b, got % x - %v", val, err)
}
// now start another read-committed tx
err = dbfile.BeginTransaction(ISOLATION_READ_COMMITTED)
if err != nil {
t.Fatal(err)
}
err = kvstore.SetKV([]byte("c"), []byte("c"))
if err != nil {
t.Fatal(err)
}
// reader can't see this, tx in progress
val, err = lookupKeyInTest([]byte("c"))
if err != RESULT_KEY_NOT_FOUND {
t.Errorf("expected not see c, tx in progress")
}
// this time abort the tx
err = dbfile.AbortTransaction()
if err != nil {
t.Fatal(err)
}
// reader still can't see this, tx aborted
val, err = lookupKeyInTest([]byte("c"))
if err != RESULT_KEY_NOT_FOUND {
t.Errorf("expected not see c, tx in progress")
}
}