| /* |
| Copyright 2017 The Kubernetes 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 waitgroup test cases reference golang sync.WaitGroup https://golang.org/src/sync/waitgroup_test.go. |
| package waitgroup |
| |
| import ( |
| "testing" |
| ) |
| |
| func TestWaitGroup(t *testing.T) { |
| wg1 := &SafeWaitGroup{} |
| wg2 := &SafeWaitGroup{} |
| n := 16 |
| wg1.Add(n) |
| wg2.Add(n) |
| exited := make(chan bool, n) |
| for i := 0; i != n; i++ { |
| go func(i int) { |
| wg1.Done() |
| wg2.Wait() |
| exited <- true |
| }(i) |
| } |
| wg1.Wait() |
| for i := 0; i != n; i++ { |
| select { |
| case <-exited: |
| t.Fatal("SafeWaitGroup released group too soon") |
| default: |
| } |
| wg2.Done() |
| } |
| for i := 0; i != n; i++ { |
| <-exited // Will block if barrier fails to unlock someone. |
| } |
| } |
| |
| func TestWaitGroupAddFail(t *testing.T) { |
| wg := &SafeWaitGroup{} |
| wg.Add(1) |
| wg.Done() |
| wg.Wait() |
| if err := wg.Add(1); err == nil { |
| t.Errorf("Should return error when add positive after Wait") |
| } |
| } |