| /* |
| Copyright 2015 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 storage |
| |
| import ( |
| "math/rand" |
| "sync" |
| "testing" |
| ) |
| |
| func TestHighWaterMark(t *testing.T) { |
| var h HighWaterMark |
| |
| for i := int64(10); i < 20; i++ { |
| if !h.Update(i) { |
| t.Errorf("unexpected false for %v", i) |
| } |
| if h.Update(i - 1) { |
| t.Errorf("unexpected true for %v", i-1) |
| } |
| } |
| |
| m := int64(0) |
| wg := sync.WaitGroup{} |
| for i := 0; i < 300; i++ { |
| wg.Add(1) |
| v := rand.Int63() |
| go func(v int64) { |
| defer wg.Done() |
| h.Update(v) |
| }(v) |
| if v > m { |
| m = v |
| } |
| } |
| wg.Wait() |
| if m != int64(h) { |
| t.Errorf("unexpected value, wanted %v, got %v", m, int64(h)) |
| } |
| } |