github.com/zignig/go-ipfs@v0.0.0-20141111235910-c9e5fdf55a52/net/conn/conn_test.go (about)

     1  package conn
     2  
     3  import (
     4  	"bytes"
     5  	"fmt"
     6  	"os"
     7  	"runtime"
     8  	"strconv"
     9  	"sync"
    10  	"testing"
    11  	"time"
    12  
    13  	context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/go.net/context"
    14  )
    15  
    16  func TestClose(t *testing.T) {
    17  	// t.Skip("Skipping in favor of another test")
    18  
    19  	ctx, cancel := context.WithCancel(context.Background())
    20  	c1, c2 := setupConn(t, ctx, "/ip4/127.0.0.1/tcp/5534", "/ip4/127.0.0.1/tcp/5545")
    21  
    22  	select {
    23  	case <-c1.Closed():
    24  		t.Fatal("done before close")
    25  	case <-c2.Closed():
    26  		t.Fatal("done before close")
    27  	default:
    28  	}
    29  
    30  	c1.Close()
    31  
    32  	select {
    33  	case <-c1.Closed():
    34  	default:
    35  		t.Fatal("not done after cancel")
    36  	}
    37  
    38  	c2.Close()
    39  
    40  	select {
    41  	case <-c2.Closed():
    42  	default:
    43  		t.Fatal("not done after cancel")
    44  	}
    45  
    46  	cancel() // close the listener :P
    47  }
    48  
    49  func TestCancel(t *testing.T) {
    50  	// t.Skip("Skipping in favor of another test")
    51  
    52  	ctx, cancel := context.WithCancel(context.Background())
    53  	c1, c2 := setupConn(t, ctx, "/ip4/127.0.0.1/tcp/5534", "/ip4/127.0.0.1/tcp/5545")
    54  
    55  	select {
    56  	case <-c1.Closed():
    57  		t.Fatal("done before close")
    58  	case <-c2.Closed():
    59  		t.Fatal("done before close")
    60  	default:
    61  	}
    62  
    63  	c1.Close()
    64  	c2.Close()
    65  	cancel() // listener
    66  
    67  	// wait to ensure other goroutines run and close things.
    68  	<-time.After(time.Microsecond * 10)
    69  	// test that cancel called Close.
    70  
    71  	select {
    72  	case <-c1.Closed():
    73  	default:
    74  		t.Fatal("not done after cancel")
    75  	}
    76  
    77  	select {
    78  	case <-c2.Closed():
    79  	default:
    80  		t.Fatal("not done after cancel")
    81  	}
    82  
    83  }
    84  
    85  func TestCloseLeak(t *testing.T) {
    86  	// t.Skip("Skipping in favor of another test")
    87  
    88  	if os.Getenv("TRAVIS") == "true" {
    89  		t.Skip("this doesn't work well on travis")
    90  	}
    91  
    92  	var wg sync.WaitGroup
    93  
    94  	runPair := func(p1, p2, num int) {
    95  		a1 := strconv.Itoa(p1)
    96  		a2 := strconv.Itoa(p2)
    97  		ctx, cancel := context.WithCancel(context.Background())
    98  		c1, c2 := setupConn(t, ctx, "/ip4/127.0.0.1/tcp/"+a1, "/ip4/127.0.0.1/tcp/"+a2)
    99  
   100  		for i := 0; i < num; i++ {
   101  			b1 := []byte("beep")
   102  			c1.Out() <- b1
   103  			b2 := <-c2.In()
   104  			if !bytes.Equal(b1, b2) {
   105  				panic("bytes not equal")
   106  			}
   107  
   108  			b2 = []byte("boop")
   109  			c2.Out() <- b2
   110  			b1 = <-c1.In()
   111  			if !bytes.Equal(b1, b2) {
   112  				panic("bytes not equal")
   113  			}
   114  
   115  			<-time.After(time.Microsecond * 5)
   116  		}
   117  
   118  		c1.Close()
   119  		c2.Close()
   120  		cancel() // close the listener
   121  		wg.Done()
   122  	}
   123  
   124  	var cons = 20
   125  	var msgs = 100
   126  	fmt.Printf("Running %d connections * %d msgs.\n", cons, msgs)
   127  	for i := 0; i < cons; i++ {
   128  		wg.Add(1)
   129  		go runPair(2000+i, 2001+i, msgs)
   130  	}
   131  
   132  	fmt.Printf("Waiting...\n")
   133  	wg.Wait()
   134  	// done!
   135  
   136  	<-time.After(time.Millisecond * 150)
   137  	if runtime.NumGoroutine() > 20 {
   138  		// panic("uncomment me to debug")
   139  		t.Fatal("leaking goroutines:", runtime.NumGoroutine())
   140  	}
   141  }