feat: add integ test and outline steps for setup

[mavogel]

• https://aws.amazon.com/blogs/devops/how-to-write-and-execute-integration-tests-for-aws-cdk-applications/
• https://dev.to/kumo/level-up-your-aws-cdk-development-demystifying-integ-runner-and-integ-test-542j
• https://github.com/pgarbe/cdk-stackset/blob/main/test/integ.stack-set.ts#L50C20-L50C63 & linked cdk. issue
• see https://www.meetup.com/german-aws-cdk-happy-hour/events/290494702/

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Hier sind die Slides zum Talk gestern:
https://speakerdeck.com/mrgrain/testing-with-the-aws-cdk

Und noch einige gute Integration-Tests Beispiele aus dem aws-cdk Repo:

Nice self-contained example

https://github.com/aws/aws-cdk/blob/5a0595edb1c5345552acbacefe2d09ec0bea31c1/packages/@aws-cdk/aws-autoscaling-hooktargets/test/integ.queue-hook.ts

Good assertions

https://github.com/aws/aws-cdk/blob/3528e3de5b5dd0a520624d4af73413370dcdc434/packages/@aws-cdk/aws-apigateway/test/integ.domain-name.ts

Setting up external dependencies

https://github.com/aws/aws-cdk/blob/cd19a0dbffe8b83670c0de1a4b4c186690f59dc2/packages/@aws-cdk/aws-iam/test/integ.imported-role.ts

Example how to call a StepFunction

https://github.com/aws/aws-cdk/blob/885760040aa09e17986281daba9b95bf4289252c/packages/@aws-cdk/aws-stepfunctions-tasks/test/aws-sdk/integ.call-aws-service-sfn.ts

Tips

--parallel-regions (default=us-east-1,us-east-2, us-west-2) List of regions to run tests in. If this is provided then all tests will be run in parallel across these regions