p2p/net/swarm: fix racey test

net/swarm/swarm_addr_test.go

@@ -26,13 +26,13 @@ func TestFilterAddrs(t *testing.T) {
 		m("/ip4/1.2.3.4/udp/1234/sctp/1234"), // not in manet
 		m("/ip4/1.2.3.4/udp/1234/utp"),       // utp is broken
 		m("/ip4/1.2.3.4/udp/1234/udt"),       // udt is broken on arm
-		m("/ip6/fe80::1/tcp/1234"),           // link local
+		m("/ip6/fe80::1/tcp/0"),              // link local
 		m("/ip6/fe80::100/tcp/1234"),         // link local
 	}
 
 	good := []ma.Multiaddr{
-		m("/ip4/127.0.0.1/tcp/1234"),
-		m("/ip6/::1/tcp/1234"),
+		m("/ip4/127.0.0.1/tcp/0"),
+		m("/ip6/::1/tcp/0"),
 	}
 
 	goodAndBad := append(good, bad...)
@@ -69,13 +69,9 @@ func TestFilterAddrs(t *testing.T) {
 		t.Fatal("should have failed to create swarm")
 	}
 
-	if _, err := NewNetwork(ctx, good, id, ps); err != nil {
+	if _, err := NewNetwork(ctx, goodAndBad, id, ps); err != nil {
 		t.Fatal("should have succeeded in creating swarm", err)
 	}
-
-	if _, err := NewNetwork(ctx, goodAndBad, id, ps); err == nil {
-		t.Fatal("should have failed to create swarm")
-	}
 }
 
 func subtestAddrsEqual(t *testing.T, a, b []ma.Multiaddr) {