Starlark Configuration Testing

[fkorotkov]

Since Starlark is a real language we need to figure out a testing scenario for .cirrus.star file. Ideally there should be a way to provide environment variables and see what kind of YAML config Starlark will output.

Should it be a part of validate command? How to mock file system access?

Creating this issue to brainstorm possible options.

My main use case can be described like that: we'll have github.com/cirrus-templates/node template that will generate either yarn specific or npm specific tasks depending on files in the repository. How can we test this template?

[edigaryev]

@fkorotkov isn't this a duplicate of already resolved #95?

[fkorotkov]

Yes!