/usr/share/gocode/src/github.com/couchbase/moss/child_collection_test.go is in golang-github-couchbase-moss-dev 0.0~git20170914.0.07c86e8-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// 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 moss
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"testing"
)
// ----------------------------------------------------
func loadItems(b Batch, startIdx, stopIdx int) {
// put numItems in the batch
for i := startIdx; i > stopIdx; i-- {
k := fmt.Sprintf("%04d", i)
b.Set([]byte(k), []byte(k))
}
}
func verifySnapshot(msg string, ss Snapshot, expectedNum int,
t *testing.T) {
defer ss.Close()
for i := 0; i < expectedNum; i++ {
k := fmt.Sprintf("%04d", i)
v, err := ss.Get([]byte(k), ReadOptions{})
if err != nil {
t.Errorf("error %s getting key: %s, %v", msg, k, err)
return
}
if string(v) != k {
t.Errorf("expected %s value for key: %s to be %s,got %s",
msg, k, k, v)
return
}
}
iter, err := ss.StartIterator(nil, nil, IteratorOptions{})
if err != nil {
t.Errorf("error %s verifySnapshot iter, err: %v", msg, err)
return
}
defer iter.Close()
n := 0
var lastKey []byte
for {
ex, key, val, err := iter.CurrentEx()
if err == ErrIteratorDone {
break
}
if err != nil {
t.Errorf("error %s iter currentEx, err: %v", msg, err)
return
}
n++
if ex.Operation != OperationSet {
t.Errorf("error %s iter op, ex: %v, err: %v", msg, ex, err)
return
}
cmp := bytes.Compare(lastKey, key)
if cmp >= 0 {
t.Errorf("error %s iter cmp: %v, err: %v", msg, cmp, err)
return
}
if bytes.Compare(key, val) != 0 {
t.Errorf("error %s iter key != val: %v, %v", msg, key, val)
return
}
lastKey = key
err = iter.Next()
if err == ErrIteratorDone {
break
}
if err != nil {
t.Errorf("error %s iter next, err: %v", msg, err)
return
}
}
if n != expectedNum {
t.Errorf("error %s iter expectedNum: %d, got: %d",
msg, expectedNum, n)
}
}
func childCollectionLoader(m *collection, childName string,
args *collTestParams, t *testing.T) {
batchSize := args.batchSize
for i := args.numIterations - 1; i >= 0; i-- {
for j := args.numItems - 1; j >= 0; j = j - batchSize {
// create new batch to set some keys
b, err := m.NewBatch(0, 0)
if err != nil {
args.doneCh <- false
t.Errorf("error creating new batch: %v", err)
return
}
// also create a child batch
childB, err := b.NewChildCollectionBatch(childName,
BatchOptions{0, 0})
if err != nil {
args.doneCh <- false
t.Errorf("error creating new child batch: %v", err)
return
}
loadItems(b, j, j-batchSize)
loadItems(childB, j, j-batchSize)
err = m.ExecuteBatch(b, WriteOptions{})
if err != nil {
args.doneCh <- false
t.Errorf("error executing batch: %v", err)
return
}
// cleanup that batch
err = b.Close()
if err != nil {
args.doneCh <- false
t.Errorf("error closing batch: %v", err)
return
}
}
topSnap, err := m.Snapshot()
if err != nil || topSnap == nil {
args.doneCh <- false
t.Errorf("error snapshoting: %v", err)
return
}
childSnap, err := topSnap.ChildCollectionSnapshot(childName)
if err != nil || childSnap == nil {
args.doneCh <- false
t.Errorf("error getting child snapshot: %v", err)
return
}
go verifySnapshot(childName, childSnap, args.numItems, t)
err = topSnap.Close()
if err != nil {
args.doneCh <- false
t.Errorf("error closing snapshot: %v", err)
return
}
}
args.doneCh <- true
}
type collTestParams struct {
numItems int
batchSize int
numIterations int
numChildren int
doneCh chan bool
}
func testChildCollections(t *testing.T, args *collTestParams) {
tmpDir, _ := ioutil.TempDir("", "mossStore")
defer os.RemoveAll(tmpDir)
store, err := OpenStore(tmpDir, DefaultStoreOptions)
if err != nil || store == nil {
t.Fatalf("error opening store :%v", tmpDir)
}
coll, _ := NewCollection(DefaultCollectionOptions)
if coll == nil {
t.Fatalf("Unable to open new collection in store")
}
coll.Start()
// Create a new child batch to validate basic child collection operations.
// Same key inserted in different child collections with different values.
theKey := []byte("sameKey")
valOfBase := []byte("valOfBase")
valOfChild := []byte("valOfChild")
valOfChildb21 := []byte("valOfChildb21")
valOfChildb22 := []byte("valOfChildb22")
b, _ := coll.NewBatch(0, 0)
b.Set(theKey, valOfBase)
b2, _ := b.NewChildCollectionBatch("child", BatchOptions{0, 0})
b2.Set(theKey, valOfChild)
b21, _ := b2.NewChildCollectionBatch("b21", BatchOptions{0, 0})
b21.Set(theKey, valOfChildb21)
b22, _ := b2.NewChildCollectionBatch("b22", BatchOptions{0, 0})
b22.Set(theKey, valOfChildb22)
err = coll.ExecuteBatch(b, WriteOptions{})
if err != nil {
t.Fatalf("Unable to ExecuteBatch on collection %v", err)
}
ss, _ := coll.Snapshot()
llss, err := store.Persist(ss, StorePersistOptions{})
if err != nil || llss == nil {
t.Fatalf("expected persist to work")
}
ss.Close()
llss.Close()
if store.Close() != nil {
t.Fatalf("expected store close to work")
}
if coll.Close() != nil {
t.Fatalf("Error closing child collection")
}
// Now reopen the persisted store & test restore child collections.
store, coll, err = OpenStoreCollection(tmpDir, DefaultStoreOptions,
StorePersistOptions{})
if err != nil {
t.Fatalf("error re-opening store :%v", tmpDir)
}
ss, _ = coll.Snapshot()
v, err := ss.Get(theKey, ReadOptions{})
if err != nil || !bytes.Equal(v, valOfBase) {
t.Fatalf("Expected key %v : got %v, %v, but got err %v",
string(theKey), string(v), string(valOfBase), err)
}
childSS, _ := ss.ChildCollectionSnapshot("child")
if childSS == nil {
t.Fatalf("child snapshot not restored after persist")
}
v, err = childSS.Get(theKey, ReadOptions{})
if err != nil || !bytes.Equal(v, valOfChild) {
t.Fatalf("Expected key %v : got %v, %v, but got err %v",
string(theKey), string(v), string(valOfChild), err)
}
b21SS, _ := childSS.ChildCollectionSnapshot("b21")
if b21SS == nil {
t.Fatalf("child snapshot b21 not restored after persist")
}
v, err = b21SS.Get(theKey, ReadOptions{})
if err != nil || !bytes.Equal(v, valOfChildb21) {
t.Fatalf("Expected key %v : got %v, %v, but got err %v",
string(theKey), string(v), string(valOfChildb21), err)
}
b21SS.Close() // close grand child snapshot.
childSS.Close() // each snapshot must be closed properly.
ss.Close() // top level close will not auto-close child snapshots.
// ----------------------------------------------------
// Now begin parallel collection load with child collections.
args.doneCh = make(chan bool, args.numChildren)
for i := 0; i < args.numChildren; i++ {
name := fmt.Sprintf("child%v", i)
m := coll.(*collection)
go childCollectionLoader(m, name, args, t)
}
for i := 0; i < args.numChildren; i++ {
<-args.doneCh
}
coll.Close()
}
func Test1Collection100items(t *testing.T) {
args := &collTestParams{
numItems: 100,
batchSize: 10,
numIterations: 1,
numChildren: 1,
}
testChildCollections(t, args)
}
func Test2Collection1000items(t *testing.T) {
args := &collTestParams{
numItems: 1000,
batchSize: 10,
numIterations: 2,
numChildren: 2,
}
testChildCollections(t, args)
}
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