153 lines
3.4 KiB
Go
153 lines
3.4 KiB
Go
/*
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Copyright 2019 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 lockingpromise
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import (
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"k8s.io/apiserver/pkg/util/flowcontrol/fairqueuing/testing/clock"
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)
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func TestLockingWriteMultiple(t *testing.T) {
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now := time.Now()
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clock, counter := clock.NewFakeEventClock(now, 0, nil)
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var lock sync.Mutex
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wr := NewWriteMultiple(&lock, counter)
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var gots int32
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var got atomic.Value
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counter.Add(1)
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go func() {
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got.Store(wr.Get())
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atomic.AddInt32(&gots, 1)
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counter.Add(-1)
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}()
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clock.Run(nil)
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time.Sleep(time.Second)
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if atomic.LoadInt32(&gots) != 0 {
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t.Error("Get returned before Set")
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}
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if wr.IsSet() {
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t.Error("IsSet before Set")
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}
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aval := &now
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wr.Set(aval)
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clock.Run(nil)
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time.Sleep(time.Second)
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if atomic.LoadInt32(&gots) != 1 {
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t.Error("Get did not return after Set")
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}
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if got.Load() != aval {
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t.Error("Get did not return what was Set")
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}
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if !wr.IsSet() {
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t.Error("IsSet()==false after Set")
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}
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counter.Add(1)
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go func() {
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got.Store(wr.Get())
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atomic.AddInt32(&gots, 1)
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counter.Add(-1)
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}()
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clock.Run(nil)
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time.Sleep(time.Second)
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if atomic.LoadInt32(&gots) != 2 {
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t.Error("Second Get did not return immediately")
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}
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if got.Load() != aval {
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t.Error("Second Get did not return what was Set")
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}
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if !wr.IsSet() {
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t.Error("IsSet()==false after second Set")
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}
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later := time.Now()
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bval := &later
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wr.Set(bval)
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if !wr.IsSet() {
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t.Error("IsSet() returned false after second set")
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} else if wr.Get() != bval {
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t.Error("Get() after second Set returned wrong value")
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}
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}
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func TestLockingWriteOnce(t *testing.T) {
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now := time.Now()
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clock, counter := clock.NewFakeEventClock(now, 0, nil)
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var lock sync.Mutex
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wr := NewWriteOnce(&lock, counter)
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var gots int32
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var got atomic.Value
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counter.Add(1)
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go func() {
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got.Store(wr.Get())
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atomic.AddInt32(&gots, 1)
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counter.Add(-1)
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}()
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clock.Run(nil)
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time.Sleep(time.Second)
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if atomic.LoadInt32(&gots) != 0 {
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t.Error("Get returned before Set")
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}
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if wr.IsSet() {
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t.Error("IsSet before Set")
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}
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aval := &now
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if !wr.Set(aval) {
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t.Error("Set() returned false")
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}
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clock.Run(nil)
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time.Sleep(time.Second)
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if atomic.LoadInt32(&gots) != 1 {
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t.Error("Get did not return after Set")
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}
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if got.Load() != aval {
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t.Error("Get did not return what was Set")
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}
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if !wr.IsSet() {
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t.Error("IsSet()==false after Set")
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}
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counter.Add(1)
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go func() {
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got.Store(wr.Get())
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atomic.AddInt32(&gots, 1)
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counter.Add(-1)
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}()
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clock.Run(nil)
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time.Sleep(time.Second)
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if atomic.LoadInt32(&gots) != 2 {
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t.Error("Second Get did not return immediately")
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}
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if got.Load() != aval {
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t.Error("Second Get did not return what was Set")
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}
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if !wr.IsSet() {
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t.Error("IsSet()==false after second Set")
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}
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later := time.Now()
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bval := &later
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if wr.Set(bval) {
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t.Error("second Set() returned true")
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}
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if !wr.IsSet() {
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t.Error("IsSet() returned false after second set")
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} else if wr.Get() != aval {
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t.Error("Get() after second Set returned wrong value")
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}
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}
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