update base integ test and snapshot

Author: scanlonp

packages/@aws-cdk-testing/framework-integ/test/aws-ec2/test/integ.vpc-dual-stack.js.snapshot/DualStackVpc.assets.json

@@ -729,6 +729,21 @@
     "DualStackProtocolVpcipv6cidr449C49CD"
    ]
   },
+  "DualStackProtocolVpcPriv1Subnet1Nat649573F0A7": {
+   "Type": "AWS::EC2::Route",
+   "Properties": {
+    "DestinationIpv6CidrBlock": "64:ff9b::/96",
+    "NatGatewayId": {
+     "Ref": "DualStackProtocolVpcPub1Subnet1NATGateway241D9A98"
+    },
+    "RouteTableId": {
+     "Ref": "DualStackProtocolVpcPriv1Subnet1RouteTableB9D9FD11"
+    }
+   },
+   "DependsOn": [
+    "DualStackProtocolVpcipv6cidr449C49CD"
+   ]
+  },
   "DualStackProtocolVpcPriv1Subnet2SubnetBC65773F": {
    "Type": "AWS::EC2::Subnet",
    "Properties": {

packages/@aws-cdk-testing/framework-integ/test/aws-ec2/test/integ.vpc-dual-stack.js.snapshot/DualStackVpc.template.json

@@ -5,7 +5,8 @@ import { IntegTest } from '@aws-cdk/integ-tests-alpha';
 const app = new App();
 const stack = new Stack(app, 'DualStackVpc');
 
-new ec2.Vpc(stack, 'DualStackProtocolVpc', {
+const natProvider = ec2.NatProvider.gateway();
+const vpc = new ec2.Vpc(stack, 'DualStackProtocolVpc', {
   ipProtocol: ec2.IpProtocol.DUAL_STACK,
   subnetConfiguration: [
     {
@@ -21,8 +22,12 @@ new ec2.Vpc(stack, 'DualStackProtocolVpc', {
       subnetType: ec2.SubnetType.PRIVATE_WITH_EGRESS,
     },
   ],
+  natGatewayProvider: natProvider,
 });
 
+const natGatewayId = natProvider.configuredGateways[0].gatewayId;
+(vpc.privateSubnets[0] as ec2.PrivateSubnet).addIpv6Nat64Route(natGatewayId);
+
 new IntegTest(app, 'DualStackTesting', {
   testCases: [stack],
 });