Extract testhelpers from loopback test suite

plugins/main/loopback/loopback_suite_test.go

@@ -15,18 +15,12 @@
 package main_test
 
 import (
-	"fmt"
-	"os"
-	"runtime"
-
 	"github.com/onsi/gomega/gexec"
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
 	"testing"
-
-	"golang.org/x/sys/unix"
 )
 
 var pathToLoPlugin string
@@ -45,47 +39,3 @@ var _ = BeforeSuite(func() {
 var _ = AfterSuite(func() {
 	gexec.CleanupBuildArtifacts()
 })
-
-func makeNetworkNS(containerID string) string {
-	namespace := "/var/run/netns/" + containerID
-	pid := unix.Getpid()
-	tid := unix.Gettid()
-
-	err := os.MkdirAll("/var/run/netns", 0600)
-	Expect(err).NotTo(HaveOccurred())
-
-	runtime.LockOSThread()
-	defer runtime.UnlockOSThread()
-	go (func() {
-		defer GinkgoRecover()
-
-		err = unix.Unshare(unix.CLONE_NEWNET)
-		Expect(err).NotTo(HaveOccurred())
-
-		fd, err := os.Create(namespace)
-		Expect(err).NotTo(HaveOccurred())
-		defer fd.Close()
-
-		err = unix.Mount("/proc/self/ns/net", namespace, "none", unix.MS_BIND, "")
-		Expect(err).NotTo(HaveOccurred())
-	})()
-
-	Eventually(namespace).Should(BeAnExistingFile())
-
-	fd, err := unix.Open(fmt.Sprintf("/proc/%d/task/%d/ns/net", pid, tid), unix.O_RDONLY, 0)
-	Expect(err).NotTo(HaveOccurred())
-
-	defer unix.Close(fd)
-
-	_, _, e1 := unix.Syscall(unix.SYS_SETNS, uintptr(fd), uintptr(unix.CLONE_NEWNET), 0)
-	Expect(e1).To(BeZero())
-
-	return namespace
-}
-
-func removeNetworkNS(networkNS string) error {
-	err := unix.Unmount(networkNS, unix.MNT_DETACH)
-
-	err = os.RemoveAll(networkNS)
-	return err
-}