Support easy log assertions for RealJenkinsRule logs as well

[gbhat618]

What feature do you want to see added?

Currently there is no easy apis to record logs and assert them in RealJenkinsRule, as how it exists in JenkinsRule.

There some PRs where log based assertions are done by setting up log recorders,
jenkinsci/jenkins#9331, jenkinsci/google-compute-engine-plugin#503

Two problems are,

• It is hard for new developers to discover to how to write such tests
• code duplicate for same work

But with, JenkinsRule, we can use LoggerRule and RuleChain (example), which is very easy.

This issue propose to implement utility class/methods to work with RealJenkinsRule, to easily create log recorder, support level, number of log lines, log message retrieval method, assertion methods.

Note: check jenkinsci/google-compute-engine-plugin#503 (comment)

Upstream changes

No response

Are you interested in contributing this feature?

yep, will try 😄