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Few hints on the Kopf usage

Not actually an issue. Just a hint.

In handle.py, I saw a code like this:

@kopf.on.create('bukwp.kopfmysql', VERSION, 'accounts')
async def create_1(body, meta, spec, status, **kwargs):
    return main(body, meta, spec, status, **kwargs)


@kopf.on.update('bukwp.kopfmysql', VERSION, 'accounts')
async def update_1(body, meta, spec, status, **kwargs):
    return main(body, meta, spec, status, **kwargs)


@kopf.on.resume('bukwp.kopfmysql', VERSION, 'accounts')
async def resume_1(body, meta, spec, status, **kwargs):
    return main(body, meta, spec, status, **kwargs)

It can be written as:

@kopf.on.create('bukwp.kopfmysql', VERSION, 'accounts')
@kopf.on.update('bukwp.kopfmysql', VERSION, 'accounts')
@kopf.on.resume('bukwp.kopfmysql', VERSION, 'accounts')
async def main(body, meta, spec, status, **kwargs):
    ...

Unless the intention is to have different behaviour in the future.

Answering your question in zalando-incubator/kopf#100 (comment) regarding testing, you might be interested in this:

https://kopf.readthedocs.io/en/latest/testing/

You can run an operator temporarily with with — while doing some API activity and remote system (MySQL) assertions. This feature is actively used in Kopf itself to run all examples as end2end tests: