ovn-k, virt, preconfigured-udn-addrs: Test MAC conflict detection

Verify KubeVirt VMs with preconfigured MAC address retain a
requested MAC address before and after another VM is created
requesting the same MAC address.
And verify the other VM requesting the same MAC address get
the appropriate address conflict error event.

Signed-off-by: Or Mergi <[email protected]>

Author: ormergi

test/extended/networking/livemigration.go

@@ -328,6 +328,20 @@ var _ = Describe("[sig-network][OCPFeatureGate:PersistentIPsForVirtualization][F
 								preconfiguredIPs: []string{"203.203.0.100", "2014:100:200::100"},
 							},
 						),
+						Entry(
+							"[OCPFeatureGate:PreconfiguredUDNAddresses] when the VM with preconfigured MAC address is created when the address is already taken",
+							networkAttachmentConfigParams{
+								name:               nadName,
+								topology:           "layer2",
+								role:               "primary",
+								allowPersistentIPs: true,
+							},
+							kubevirt.FedoraVMWithPreconfiguredPrimaryUDNAttachment,
+							duplicateVM,
+							workloadNetworkConfig{
+								preconfiguredMAC: "02:00:00:22:22:22",
+							},
+						),
 					)
 				},
 				Entry("NetworkAttachmentDefinitions", func(c networkAttachmentConfigParams) networkAttachmentConfig {
@@ -586,6 +600,21 @@ func duplicateVM(cli *kubevirt.Client, vmNamespace, vmName string) {
 			)
 		})
 	}
+
+	mac, err := cli.GetJSONPath("vmi", vmName, "{.spec.domain.devices.interfaces[0].macAddress}")
+	Expect(err).NotTo(HaveOccurred())
+	if len(mac) > 0 {
+		vmiExpectations = append(vmiExpectations, func() {
+			waitForVMPodEventWithMessage(
+				cli,
+				vmNamespace,
+				duplicateVMName,
+				"MAC address already in use",
+				2*time.Minute,
+			)
+		})
+	}
+
 	Expect(cli.CreateVMIFromSpec(vmNamespace, duplicateVMName, vmiSpec, vmiCreationOptions...)).To(Succeed())
 	for _, expectation := range vmiExpectations {
 		expectation()