Test UpdateGuestNetworkInterface()

But passing "1" twice doesn't look right.

Author: kzys

machine_test.go

@@ -275,6 +275,13 @@ func TestMicroVMExecution(t *testing.T) {
 
 	vmlinuxPath := getVmlinuxPath(t)
 
+	networkIfaces := []NetworkInterface{
+		{
+			MacAddress:  "01-23-45-67-89-AB-CD-EF",
+			HostDevName: "tap0",
+		},
+	}
+
 	cfg := Config{
 		SocketPath:  socketPath,
 		LogFifo:     logFifo,
@@ -288,6 +295,7 @@ func TestMicroVMExecution(t *testing.T) {
 		},
 		Debug:             true,
 		DisableValidation: true,
+		NetworkInterfaces: networkIfaces,
 	}
 
 	ctx := context.Background()
@@ -332,6 +340,7 @@ func TestMicroVMExecution(t *testing.T) {
 	t.Run("TestAttachVsock", func(t *testing.T) { testAttachVsock(ctx, t, m) })
 	t.Run("SetMetadata", func(t *testing.T) { testSetMetadata(ctx, t, m) })
 	t.Run("TestUpdateGuestDrive", func(t *testing.T) { testUpdateGuestDrive(ctx, t, m) })
+	t.Run("TestUpdateGuestNetworkInterface", func(t *testing.T) { testUpdateGuestNetworkInterface(ctx, t, m) })
 	t.Run("TestStartInstance", func(t *testing.T) { testStartInstance(ctx, t, m) })
 
 	// Let the VMM start and stabilize...
@@ -489,6 +498,12 @@ func testUpdateGuestDrive(ctx context.Context, t *testing.T, m *Machine) {
 	}
 }
 
+func testUpdateGuestNetworkInterface(ctx context.Context, t *testing.T, m *Machine) {
+	if err := m.UpdateGuestNetworkInterface(ctx, "1", models.PartialNetworkInterface{IfaceID: String("1")}); err != nil {
+		t.Fatalf("Failed to update the network interface %v", err)
+	}
+}
+
 func testCreateNetworkInterfaceByID(ctx context.Context, t *testing.T, m *Machine) {
 	if skipTuntap {
 		t.Skip("Skipping: tuntap tests explicitly disabled")