github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/configuration/config_manager/signal_test.go (about)

     1  //go:build linux || darwin
     2  
     3  /*
     4  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     5  
     6  This file is part of KubeBlocks project
     7  
     8  This program is free software: you can redistribute it and/or modify
     9  it under the terms of the GNU Affero General Public License as published by
    10  the Free Software Foundation, either version 3 of the License, or
    11  (at your option) any later version.
    12  
    13  This program is distributed in the hope that it will be useful
    14  but WITHOUT ANY WARRANTY; without even the implied warranty of
    15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16  GNU Affero General Public License for more details.
    17  
    18  You should have received a copy of the GNU Affero General Public License
    19  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    20  */
    21  
    22  package configmanager
    23  
    24  import (
    25  	"context"
    26  	"os"
    27  	"os/signal"
    28  	"syscall"
    29  	"testing"
    30  	"time"
    31  
    32  	"github.com/stretchr/testify/require"
    33  )
    34  
    35  func TestSendSignal(t *testing.T) {
    36  	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGUSR1)
    37  	defer stop()
    38  
    39  	// for not expect signal
    40  	{
    41  		err := sendSignal(PID(os.Getpid()), syscall.SIGUSR2)
    42  		if err != nil {
    43  			logger.Error(err, "failed to send signal")
    44  		}
    45  		select {
    46  		case <-time.After(time.Second):
    47  			// walk here
    48  			logger.Info("missed signal.")
    49  			require.True(t, true)
    50  		case <-ctx.Done():
    51  			require.True(t, false)
    52  		}
    53  	}
    54  
    55  	// for expect signal
    56  	{
    57  		err := sendSignal(PID(os.Getpid()), syscall.SIGUSR1)
    58  		if err != nil {
    59  			logger.Error(err, "failed to send signal")
    60  		}
    61  
    62  		select {
    63  		case <-time.After(time.Second):
    64  			// not walk here
    65  			logger.Info("missed signal.")
    66  			require.True(t, false)
    67  		case <-ctx.Done():
    68  			require.True(t, true)
    69  			// prints "context canceled"
    70  			logger.Info(ctx.Err().Error())
    71  			// stop receiving signal notifications as soon as possible.
    72  			stop()
    73  		}
    74  
    75  	}
    76  }