69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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.
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*/
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package eventclock
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import (
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"math/rand"
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"sync/atomic"
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"testing"
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"time"
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)
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func TestRealEventClock(t *testing.T) {
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ec := Real{}
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var numDone int32
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now := ec.Now()
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const batchSize = 100
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times := make(chan time.Time, batchSize+1)
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try := func(abs bool, d time.Duration) {
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f := func(u time.Time) {
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realD := ec.Since(now)
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atomic.AddInt32(&numDone, 1)
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times <- u
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if realD < d {
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t.Errorf("Asked for %v, got %v", d, realD)
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}
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}
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if abs {
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ec.EventAfterTime(f, now.Add(d))
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} else {
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ec.EventAfterDuration(f, d)
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}
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}
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try(true, time.Millisecond*3300)
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for i := 0; i < batchSize; i++ {
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d := time.Duration(rand.Intn(30)-3) * time.Millisecond * 100
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try(i%2 == 0, d)
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}
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time.Sleep(time.Second * 4)
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if atomic.LoadInt32(&numDone) != batchSize+1 {
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t.Errorf("Got only %v events", numDone)
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}
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lastTime := now
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for i := 0; i <= batchSize; i++ {
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nextTime := <-times
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if nextTime.Before(now) {
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continue
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}
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dt := nextTime.Sub(lastTime) / (50 * time.Millisecond)
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if dt < 0 {
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t.Errorf("Got %s after %s", nextTime, lastTime)
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}
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lastTime = nextTime
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}
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}
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