Tests needed

[abukharov]

This code is completely untested. There's a need for some sort of automated testing.

[danhornby]

I think it needs to be tested with AWS (ie not just unit testing).

We should look to testing some scenarios like:

• stack create

• stack create with custom cfn resource/lambda

• stack update

• stack delete

• stackset creation

• stackset instance create - default region

• stackset instance create - many regions

• stackset instances create - with override

• stackset instance create with custom cfn resources/lambda

• stackset instance amendments - various on above

• stackset instance removal

• stackset removal

We should build/use a harness to put together these testcases. I'm not sure if anything already exists... we should investigate.

[abukharov]

In the meantime I test some most critical parts: cc6257f

As @maheshrayas found an issue in stackset grouping.