plugins/ptp: test for valid data in Interfaces field

plugins/main/ptp/ptp_test.go

@@ -78,12 +78,14 @@ var _ = Describe("ptp Operations", func() {
  // Make sure ptp link exists in the target namespace
  // Then, ping the gateway
  seenIPs := 0
+
+ wantMac := ""
  err = targetNs.Do(func(ns.NetNS) error {
  defer GinkgoRecover()
 
  link, err := netlink.LinkByName(IFNAME)
  Expect(err).NotTo(HaveOccurred())
- Expect(link.Attrs().Name).To(Equal(IFNAME))
+ wantMac = link.Attrs().HardwareAddr.String()
 
  for _, ipc := range res.IPs {
  if *ipc.Interface != 1 {
@@ -105,6 +107,17 @@ var _ = Describe("ptp Operations", func() {
 
  Expect(seenIPs).To(Equal(numIPs))
 
+ // make sure the interfaces are correct
+ Expect(res.Interfaces).To(HaveLen(2))
+
+ Expect(res.Interfaces[0].Name).To(HavePrefix("veth"))
+ Expect(res.Interfaces[0].Mac).To(HaveLen(17))
+ Expect(res.Interfaces[0].Sandbox).To(BeEmpty())
+
+ Expect(res.Interfaces[1].Name).To(Equal(IFNAME))
+ Expect(res.Interfaces[1].Mac).To(Equal(wantMac))
+ Expect(res.Interfaces[1].Sandbox).To(Equal(targetNs.Path()))
+
  // Call the plugins with the DEL command, deleting the veth endpoints
  err = originalNS.Do(func(ns.NetNS) error {
  defer GinkgoRecover()