Unit testing utilities

[eladb]

We would like to offer utilities for unit testing in the cdk8s.Testing class.

Here are some examples of useful assertions:

1. Assert that a chart synthesizes a manifest with a specific API object of a specific kind and optionally: apiVersion, a subset of properties (or exact match)
2. assert count of API objects from a certain kind
3. Assert that a chart synthesizes a manifest that matches a snapshot stored in a file (would be nice to make it easy to update the snapshot by e.g. setting an env. variable).

These functions should be testing-framework agnostic (and naturally jsii-able) so they can be used in all languages. If people want to create wrappers/plugins for specific frameworks, it should be easy to wrap these utilities.

[manparvesh]

Hey @eladb can I work on this issue? I'm really interested in contributing to this project.

[eladb]

Yes, absolutely. You can find inspiration in the how the AWS CDK testing works and the @aws-cdk/assert module. I was wondering if perhaps we should actually write this as a general purpose JSON assertion library instead of cdk8s specific.

Would you be able to write a quick RFC that plots your plan for this so we will make sure we are on the same page?

[wuqunfei]

Is anyone can share detail implementation direction we can go? this feature and CDK pipeline feature can make difference between the helm and programming language. I am join to contriube on it.

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Closing this issue as it hasn't seen activity for a while. Please add a comment @mentioning a maintainer to reopen.

[Hunter-Thompson]

keep

[Hunter-Thompson]

Can we reopen this issue? @eladb, @iliapolo

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[Hunter-Thompson]

keep