Test substitution logic for IP construction with dummy resource (sub, select, ssm)

test1.yaml

AWSTemplateFormatVersion: '2010-09-09'
Description: Test substitution logic for IP construction with dummy resource.

Resources:
  DummyResource:
    Type: AWS::CloudFormation::WaitConditionHandle

Outputs:
  FabricComponentsStaticIP:
    Value: !Sub 
      - "${Octet1}.${Octet2}.${Octet3}.10/${SubnetMask}"
      - Octet1: !Select [0, !Split [".", "10.1.2.0"]]
        Octet2: !Select [1, !Split [".", "10.1.2.0"]]
        Octet3: !Select [2, !Split [".", "10.1.2.0"]]
        SubnetMask: "{{resolve:ssm:/subnet_mask}}"

test2.yaml

AWSTemplateFormatVersion: '2010-09-09'
Description: Test substitution logic for IP construction with dummy resource.

Resources:
  DummyResource:
    Type: AWS::CloudFormation::WaitConditionHandle

  CouchDBInstanceStaticIPAZ1Config:
    Type: Custom::JsCode
    Properties:
      ServiceToken: !Sub '{{resolve:ssm:/JsVmArn}}'
      JSCode: !Sub |
        ( () => {
            const cidr = "{{resolve:ssm:/Subnet1Cidr}}";
            const subnetMask = "{{resolve:ssm:/subnet_mask}}";

            const [octet1, octet2, octet3] = cidr.split("/")[0].split(".");
            const staticIP = `${!octet1}.${!octet2}.${!octet3}.10/${!subnetMask}`;

            return {
                StaticIP: staticIP
            };
        })()

Outputs:

  StaticIP:
    Value: !GetAtt CouchDBInstanceStaticIPAZ1Config.StaticIP