github.com/m3db/m3@v1.5.0/src/x/resource/lifetime_test.go (about)

     1  // Copyright (c) 2019 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package resource
    22  
    23  import (
    24  	"testing"
    25  	"time"
    26  
    27  	"github.com/stretchr/testify/require"
    28  	"go.uber.org/atomic"
    29  )
    30  
    31  func TestCancellableLifetime(t *testing.T) {
    32  	l := NewCancellableLifetime()
    33  
    34  	checkouts := 42
    35  
    36  	for i := 0; i < checkouts; i++ {
    37  		ok := l.TryCheckout()
    38  		require.True(t, ok)
    39  	}
    40  
    41  	// Launch cancel goroutine
    42  	cancelDone := atomic.NewBool(false)
    43  	go func() {
    44  		l.Cancel()
    45  		cancelDone.Store(true)
    46  	}()
    47  
    48  	for i := 0; i < checkouts; i++ {
    49  		time.Sleep(2 * time.Millisecond)
    50  
    51  		// Ensure not done yet until final release
    52  		done := cancelDone.Load()
    53  		require.False(t, done)
    54  
    55  		l.ReleaseCheckout()
    56  	}
    57  
    58  	// Ensure cannot checkout any longer
    59  	ok := l.TryCheckout()
    60  	require.False(t, ok)
    61  
    62  	// Ensure that cancel finished
    63  	for {
    64  		if cancelDone.Load() {
    65  			break
    66  		}
    67  		time.Sleep(2 * time.Millisecond)
    68  	}
    69  }