mirror of https://github.com/k3s-io/k3s
128 lines
2.6 KiB
Go
128 lines
2.6 KiB
Go
/*
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Copyright 2015 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 threading
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import (
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"sync"
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"testing"
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"time"
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)
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type fakeExiter struct {
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format string
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args []interface{}
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exited bool
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}
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func (f *fakeExiter) Exitf(format string, args ...interface{}) {
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f.format = format
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f.args = args
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f.exited = true
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}
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func TestMaxLockPeriod(t *testing.T) {
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lock := &sync.RWMutex{}
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panicked := false
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func() {
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defer func() {
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if r := recover(); r != nil {
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panicked = true
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}
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}()
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DeadlockWatchdogReadLock(lock, "test lock", 0)
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}()
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if !panicked {
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t.Errorf("expected a panic for a zero max lock period")
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}
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}
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func TestDeadlockWatchdogLocked(t *testing.T) {
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lock := &sync.RWMutex{}
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lock.Lock()
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exitCh := make(chan time.Time, 1)
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fake := fakeExiter{}
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detector := &deadlockDetector{
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lock: &rwMutexToLockableAdapter{lock},
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name: "test deadlock",
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exitChannelFn: func() <-chan time.Time { return exitCh },
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exiter: &fake,
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}
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exitCh <- time.Time{}
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detector.run()
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if !fake.exited {
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t.Errorf("expected to have exited")
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}
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if len(fake.args) != 1 || fake.args[0].(string) != detector.name {
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t.Errorf("unexpected args: %v", fake.args)
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}
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}
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func TestDeadlockWatchdogUnlocked(t *testing.T) {
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lock := &sync.RWMutex{}
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fake := fakeExiter{}
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detector := &deadlockDetector{
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lock: &rwMutexToLockableAdapter{lock},
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name: "test deadlock",
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exitChannelFn: func() <-chan time.Time { return time.After(time.Second * 5) },
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exiter: &fake,
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}
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for i := 0; i < 100; i++ {
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detector.runOnce()
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}
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if fake.exited {
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t.Errorf("expected to have not exited")
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}
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}
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func TestDeadlockWatchdogLocking(t *testing.T) {
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lock := &sync.RWMutex{}
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fake := fakeExiter{}
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go func() {
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for {
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lock.Lock()
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lock.Unlock()
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}
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}()
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detector := &deadlockDetector{
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lock: &rwMutexToLockableAdapter{lock},
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name: "test deadlock",
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exitChannelFn: func() <-chan time.Time { return time.After(time.Second * 5) },
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exiter: &fake,
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}
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for i := 0; i < 100; i++ {
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detector.runOnce()
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}
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if fake.exited {
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t.Errorf("expected to have not exited")
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}
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}
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