195 lines
5.0 KiB
Go
195 lines
5.0 KiB
Go
// Copyright 2016 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.package recipe
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package integration
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import (
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"fmt"
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"math/rand"
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"strconv"
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"testing"
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"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
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v3 "github.com/coreos/etcd/clientv3"
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"github.com/coreos/etcd/clientv3/concurrency"
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)
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// TestSTMConflict tests that conflicts are retried.
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func TestSTMConflict(t *testing.T) {
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clus := NewClusterV3(t, &ClusterConfig{Size: 3})
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defer clus.Terminate(t)
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etcdc := clus.RandClient()
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keys := make([]string, 5)
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for i := 0; i < len(keys); i++ {
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keys[i] = fmt.Sprintf("foo-%d", i)
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if _, err := etcdc.Put(context.TODO(), keys[i], "100"); err != nil {
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t.Fatalf("could not make key (%v)", err)
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}
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}
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errc := make(chan error)
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for i := range keys {
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curEtcdc := clus.RandClient()
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srcKey := keys[i]
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applyf := func(stm concurrency.STM) error {
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src := stm.Get(srcKey)
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// must be different key to avoid double-adding
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dstKey := srcKey
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for dstKey == srcKey {
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dstKey = keys[rand.Intn(len(keys))]
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}
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dst := stm.Get(dstKey)
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srcV, _ := strconv.ParseInt(src, 10, 64)
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dstV, _ := strconv.ParseInt(dst, 10, 64)
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xfer := int64(rand.Intn(int(srcV)) / 2)
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stm.Put(srcKey, fmt.Sprintf("%d", srcV-xfer))
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stm.Put(dstKey, fmt.Sprintf("%d", dstV+xfer))
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return nil
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}
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go func() {
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_, err := concurrency.NewSTMRepeatable(context.TODO(), curEtcdc, applyf)
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errc <- err
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}()
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}
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// wait for txns
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for range keys {
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if err := <-errc; err != nil {
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t.Fatalf("apply failed (%v)", err)
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}
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}
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// ensure sum matches initial sum
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sum := 0
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for _, oldkey := range keys {
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rk, err := etcdc.Get(context.TODO(), oldkey)
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if err != nil {
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t.Fatalf("couldn't fetch key %s (%v)", oldkey, err)
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}
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v, _ := strconv.ParseInt(string(rk.Kvs[0].Value), 10, 64)
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sum += int(v)
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}
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if sum != len(keys)*100 {
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t.Fatalf("bad sum. got %d, expected %d", sum, len(keys)*100)
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}
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}
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// TestSTMPutNewKey confirms a STM put on a new key is visible after commit.
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func TestSTMPutNewKey(t *testing.T) {
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clus := NewClusterV3(t, &ClusterConfig{Size: 1})
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defer clus.Terminate(t)
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etcdc := clus.RandClient()
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applyf := func(stm concurrency.STM) error {
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stm.Put("foo", "bar")
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return nil
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}
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if _, err := concurrency.NewSTMRepeatable(context.TODO(), etcdc, applyf); err != nil {
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t.Fatalf("error on stm txn (%v)", err)
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}
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resp, err := etcdc.Get(context.TODO(), "foo")
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if err != nil {
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t.Fatalf("error fetching key (%v)", err)
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}
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if string(resp.Kvs[0].Value) != "bar" {
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t.Fatalf("bad value. got %+v, expected 'bar' value", resp)
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}
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}
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// TestSTMAbort tests that an aborted txn does not modify any keys.
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func TestSTMAbort(t *testing.T) {
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clus := NewClusterV3(t, &ClusterConfig{Size: 1})
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defer clus.Terminate(t)
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etcdc := clus.RandClient()
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ctx, cancel := context.WithCancel(context.TODO())
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applyf := func(stm concurrency.STM) error {
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stm.Put("foo", "baz")
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cancel()
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stm.Put("foo", "bap")
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return nil
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}
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if _, err := concurrency.NewSTMRepeatable(ctx, etcdc, applyf); err == nil {
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t.Fatalf("no error on stm txn")
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}
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resp, err := etcdc.Get(context.TODO(), "foo")
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if err != nil {
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t.Fatalf("error fetching key (%v)", err)
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}
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if len(resp.Kvs) != 0 {
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t.Fatalf("bad value. got %+v, expected nothing", resp)
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}
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}
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// TestSTMSerialize tests that serialization is honored when serializable.
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func TestSTMSerialize(t *testing.T) {
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clus := NewClusterV3(t, &ClusterConfig{Size: 3})
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defer clus.Terminate(t)
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etcdc := clus.RandClient()
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// set up initial keys
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keys := make([]string, 5)
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for i := 0; i < len(keys); i++ {
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keys[i] = fmt.Sprintf("foo-%d", i)
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}
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// update keys in full batches
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updatec := make(chan struct{})
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go func() {
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defer close(updatec)
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for i := 0; i < 5; i++ {
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s := fmt.Sprintf("%d", i)
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ops := []v3.Op{}
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for _, k := range keys {
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ops = append(ops, v3.OpPut(k, s))
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}
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if _, err := etcdc.Txn(context.TODO()).Then(ops...).Commit(); err != nil {
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t.Fatalf("couldn't put keys (%v)", err)
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}
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updatec <- struct{}{}
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}
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}()
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// read all keys in txn, make sure all values match
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errc := make(chan error)
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for range updatec {
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curEtcdc := clus.RandClient()
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applyf := func(stm concurrency.STM) error {
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vs := []string{}
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for i := range keys {
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vs = append(vs, stm.Get(keys[i]))
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}
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for i := range vs {
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if vs[0] != vs[i] {
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return fmt.Errorf("got vs[%d] = %v, want %v", i, vs[i], vs[0])
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}
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}
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return nil
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}
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go func() {
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_, err := concurrency.NewSTMSerializable(context.TODO(), curEtcdc, applyf)
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errc <- err
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}()
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}
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for i := 0; i < 5; i++ {
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if err := <-errc; err != nil {
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t.Error(err)
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}
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}
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}
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