NO-JIRA: docs(tests/): add interactive PyTest tutorial

[jiridanek]

Description

How Has This Been Tested?

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[jstourac]

Thank you for this, Jiri. But I'm wondering - do we really want this as part of this repository? 🤔 Wouldn't some links to an existing tutorial be enough? 🤔 From the current content, it looks like you plan to extend this. How big do you want this to be?

[jiridanek]

Thank you for this, Jiri. But I'm wondering - do we really want this as part of this repository? 🤔

I originally wanted to do this already in https://github.com/skodjob/odh-e2e. I was learning how to do things with the fabric8 client and this is imo a good way to keep notes,

Wouldn't some links to an existing tutorial be enough? 🤔

The advantage of doing it this way is that whoever reads it can immediately run the sample tests and modify the code. It can be useful when writing a new test and wanting to use some sample code to start from.

From the current content, it looks like you plan to extend this. How big do you want this to be?

Pytest basics (essentially what's there already), and kubernetes-py basics, and ocp_resources basics.

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[jiridanek]

Here's what I intend as continuation of this. It should be a convenient place from which to

1. get acquainted with the testsuite
2. copypaste snippets

test_02_shiftleft.txt
test_xx_openshift.txt

[jiridanek]

This thing has little carrying cost if we just have it around. And it's kind of useful for quick trying out things.