Run TestSocketGet in dedicated netns

Signed-off-by: Alessandro Boch <aboch@tetrationanalytics.com>

netlink_test.go

@@ -43,6 +43,29 @@ func setUpNetlinkTest(t *testing.T) tearDownNetlinkTest {
 	}
 }
 
+func setUpNetlinkTestWithLoopback(t *testing.T) tearDownNetlinkTest {
+	skipUnlessRoot(t)
+
+	runtime.LockOSThread()
+	ns, err := netns.New()
+	if err != nil {
+		t.Fatal("Failed to create new netns", ns)
+	}
+
+	link, err := LinkByName("lo")
+	if err != nil {
+		t.Fatalf("Failed to find \"lo\" in new netns: %v", err)
+	}
+	if err := LinkSetUp(link); err != nil {
+		t.Fatalf("Failed to bring up \"lo\" in new netns: %v", err)
+	}
+
+	return func() {
+		ns.Close()
+		runtime.UnlockOSThread()
+	}
+}
+
 func setUpMPLSNetlinkTest(t *testing.T) tearDownNetlinkTest {
 	if _, err := os.Stat("/proc/sys/net/mpls/platform_labels"); err != nil {
 		t.Skip("Test requires MPLS support.")

socket_test.go

@@ -5,16 +5,14 @@ package netlink
 import (
 	"log"
 	"net"
-	"os"
 	"os/user"
 	"strconv"
 	"testing"
 )
 
 func TestSocketGet(t *testing.T) {
-	if os.Getenv("TRAVIS_BUILD_DIR") != "" {
-		t.Skipf("Goroutines + network namespaces == inconsistent results")
-	}
+	defer setUpNetlinkTestWithLoopback(t)()
+
 	addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
 	if err != nil {
 		log.Fatal(err)