| // Copyright 2016 The etcd Authors |
| // |
| // 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 integration |
| |
| import ( |
| "testing" |
| "time" |
| |
| "github.com/coreos/etcd/clientv3" |
| "github.com/coreos/etcd/contrib/recipes" |
| "github.com/coreos/etcd/pkg/testutil" |
| ) |
| |
| func TestBarrierSingleNode(t *testing.T) { |
| defer testutil.AfterTest(t) |
| clus := NewClusterV3(t, &ClusterConfig{Size: 1}) |
| defer clus.Terminate(t) |
| testBarrier(t, 5, func() *clientv3.Client { return clus.clients[0] }) |
| } |
| |
| func TestBarrierMultiNode(t *testing.T) { |
| defer testutil.AfterTest(t) |
| clus := NewClusterV3(t, &ClusterConfig{Size: 3}) |
| defer clus.Terminate(t) |
| testBarrier(t, 5, func() *clientv3.Client { return clus.RandClient() }) |
| } |
| |
| func testBarrier(t *testing.T, waiters int, chooseClient func() *clientv3.Client) { |
| b := recipe.NewBarrier(chooseClient(), "test-barrier") |
| if err := b.Hold(); err != nil { |
| t.Fatalf("could not hold barrier (%v)", err) |
| } |
| if err := b.Hold(); err == nil { |
| t.Fatalf("able to double-hold barrier") |
| } |
| |
| donec := make(chan struct{}) |
| for i := 0; i < waiters; i++ { |
| go func() { |
| br := recipe.NewBarrier(chooseClient(), "test-barrier") |
| if err := br.Wait(); err != nil { |
| t.Fatalf("could not wait on barrier (%v)", err) |
| } |
| donec <- struct{}{} |
| }() |
| } |
| |
| select { |
| case <-donec: |
| t.Fatalf("barrier did not wait") |
| default: |
| } |
| |
| if err := b.Release(); err != nil { |
| t.Fatalf("could not release barrier (%v)", err) |
| } |
| |
| timerC := time.After(time.Duration(waiters*100) * time.Millisecond) |
| for i := 0; i < waiters; i++ { |
| select { |
| case <-timerC: |
| t.Fatalf("barrier timed out") |
| case <-donec: |
| } |
| } |
| } |