fix go vet

dial_test.go

@@ -583,19 +583,23 @@ func TestDialSimultaneousJoin(t *testing.T) {
 	go acceptAndHang(s2silentListener)
 
 	connch := make(chan network.Conn, 512)
+	errs := make(chan error, 2)
 
 	// start a dial to s2 through the silent addr
 	go func() {
 		s1.Peerstore().AddAddrs(s2.LocalPeer(), s2silentAddrs, peerstore.PermanentAddrTTL)
 
 		c, err := s1.DialPeer(ctx, s2.LocalPeer())
 		if err != nil {
-			t.Fatal(err)
+			errs <- err
+			connch <- nil
+			return
 		}
 
 		t.Logf("first dial succedded; conn: %+v", c)
 
 		connch <- c
+		errs <- nil
 	}()
 
 	// wait a bit for the dial to take hold
@@ -605,18 +609,22 @@ func TestDialSimultaneousJoin(t *testing.T) {
 	go func() {
 		s2addrs, err := s2.InterfaceListenAddresses()
 		if err != nil {
-			t.Fatal(err)
+			errs <- err
+			return
 		}
 		s1.Peerstore().AddAddrs(s2.LocalPeer(), s2addrs[:1], peerstore.PermanentAddrTTL)
 
 		c, err := s1.DialPeer(ctx, s2.LocalPeer())
 		if err != nil {
-			t.Fatal(err)
+			errs <- err
+			connch <- nil
+			return
 		}
 
 		t.Logf("second dial succedded; conn: %+v", c)
 
 		connch <- c
+		errs <- nil
 	}()
 
 	// wait for the second dial to finish
@@ -626,16 +634,27 @@ func TestDialSimultaneousJoin(t *testing.T) {
 	go func() {
 		c, err := s1.DialPeer(ctx, s2.LocalPeer())
 		if err != nil {
-			t.Fatal(err)
+			errs <- err
+			connch <- nil
+			return
 		}
 
 		t.Logf("third dial succedded; conn: %+v", c)
 
 		connch <- c
+		errs <- nil
 	}()
 
 	c3 := <-connch
 
+	// raise any errors from the previous goroutines
+	for i := 0; i < 3; i++ {
+		err := <-errs
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+
 	if c2 != c3 {
 		t.Fatal("expected c2 and c3 to be the same")
 	}

limiter_test.go

@@ -2,6 +2,7 @@ package swarm
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math/rand"
 	"strconv"
@@ -379,8 +380,12 @@ func TestFDLimitUnderflow(t *testing.T) {
 		addrs = append(addrs, addrWithPort(t, i))
 	}
 
+	wg := sync.WaitGroup{}
+	wg.Add(1000)
+	errs := make(chan error, 1000)
 	for i := 0; i < 1000; i++ {
 		go func(id peer.ID, i int) {
+			defer wg.Done()
 			ctx, cancel := context.WithCancel(context.Background())
 
 			resp := make(chan dialResult)
@@ -406,12 +411,19 @@ func TestFDLimitUnderflow(t *testing.T) {
 				if res.Err != nil {
 					return
 				}
-				t.Fatal("got dial res, shouldn't")
+				errs <- errors.New("got dial res, but shouldn't")
 			}
 		}(peer.ID(fmt.Sprintf("testpeer%d", i%20)), i)
 	}
 
-	time.Sleep(time.Second * 3)
+	go func() {
+		wg.Wait()
+		close(errs)
+	}()
+
+	for err := range errs {
+		t.Fatal(err)
+	}
 
 	l.lk.Lock()
 	fdConsuming := l.fdConsuming