Add yarn Nexus cleanup task

[akhmanova]

Remove temporary Nexus data for stale or
failed requests that uses "yarn" as package manager.

I am not really sure how to add a unit test, because for pip we have a magic number 42 there

[athos-ribeiro]

Can we add some unit tests to cover this change?

[athos-ribeiro]

I am not really sure how to add a unit test, because for pip we have a magic number 42 there

It would be similar. That "magic number" is just a fake request ID (and also the answer to the ultimate question of life, the universe, and everything)

[renanrodrigo]

I am not really sure how to add a unit test, because for pip we have a magic number 42 there

It would be similar. That "magic number" is just a fake request ID (and also the answer to the ultimate question of life, the universe, and everything)

Many people have speculated that if we knew exactly why the test had been written like that we would know a lot more about the nature of the Universe than we do now.

[akhmanova]

@athos-ribeiro Ok, there is a new unit test. But looks like something is fundamentally wrong with the universe and the test coverage is broken for me locally:

cachito/workers/tasks/yarn.py                    8      6    25%   7-19
--------------------------------------------------------------------------
TOTAL                                         3728   2893    22%
Coverage HTML written to dir htmlcov
Coverage XML written to file coverage.xml

[athos-ribeiro]

@athos-ribeiro Ok, there is a new unit test. But looks like something is fundamentally wrong with the universe and the test coverage is broken for me locally:

cachito/workers/tasks/yarn.py                    8      6    25%   7-19
--------------------------------------------------------------------------
TOTAL                                         3728   2893    22%
Coverage HTML written to dir htmlcov
Coverage XML written to file coverage.xml

Could that be that you are running just one specific test instead of the test suite?

Travis reposts 100% coverage there:

However, tests are failing:

E           AssertionError: expected call not found.

E           Expected: execute_script('js_cleanup', {'repository_name': 'some-yarn-repo-42', 'username': 'true-lover-of-douglas-adams'})

E           Actual: execute_script('js_cleanup', {'repository_name': 'cachito-yarn-42', 'username': 'cachito-yarn-42'})

[athos-ribeiro]

Nice work!

LGTM