sigs.k8s.io/controller-runtime@v0.18.2/pkg/manager/signals/signal_test.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package signals
    18  
    19  import (
    20  	"fmt"
    21  	"os"
    22  	"os/signal"
    23  	"sync"
    24  	"time"
    25  
    26  	. "github.com/onsi/ginkgo/v2"
    27  	. "github.com/onsi/gomega"
    28  )
    29  
    30  var _ = Describe("runtime signal", func() {
    31  
    32  	Context("SignalHandler Test", func() {
    33  
    34  		It("test signal handler", func() {
    35  			ctx := SetupSignalHandler()
    36  			task := &Task{
    37  				ticker: time.NewTicker(time.Second * 2),
    38  			}
    39  			c := make(chan os.Signal, 1)
    40  			signal.Notify(c, os.Interrupt)
    41  			task.wg.Add(1)
    42  			go func(c chan os.Signal) {
    43  				defer task.wg.Done()
    44  				task.Run(c)
    45  			}(c)
    46  
    47  			select {
    48  			case sig := <-c:
    49  				fmt.Printf("Got %s signal. Aborting...\n", sig)
    50  			case _, ok := <-ctx.Done():
    51  				Expect(ok).To(BeFalse())
    52  			}
    53  		})
    54  
    55  	})
    56  
    57  })
    58  
    59  type Task struct {
    60  	wg     sync.WaitGroup
    61  	ticker *time.Ticker
    62  }
    63  
    64  func (t *Task) Run(c chan os.Signal) {
    65  	for {
    66  		go sendSignal(c)
    67  		handle()
    68  	}
    69  }
    70  
    71  func handle() {
    72  	for i := 0; i < 5; i++ {
    73  		fmt.Print("#")
    74  		time.Sleep(time.Millisecond * 100)
    75  	}
    76  	fmt.Println()
    77  }
    78  
    79  func sendSignal(stopChan chan os.Signal) {
    80  	fmt.Printf("...")
    81  	time.Sleep(1 * time.Second)
    82  	stopChan <- os.Interrupt
    83  }