[Test Plan] [Metrics UI] Alert warning thresholds

[Zacqary]

Summary

This test plan covers the new warning severity threshold option in Inventory and Metric threshold alerts (#90070)

Scenarios

Inventory

• You can successfully create an Inventory alert without adding a Warning threshold
• The UI allows you to optionally add a Warning threshold
• The alert executes and fires the Warning action group as expected when the Warning threshold (but not the Alert threshold) is crossed [Note that you must define a Warning action group, and you won't be prompted if you don't; this is a known issue with the Alerting plugin]

Metric Threshold

• You can successfully create a Metric Threshold alert without adding a Warning threshold
• The UI allows you to optionally add a Warning threshold
• The expression chart displays a yellow annotation for the Warning threshold and a red annotation for the Critical threshold
• The alert executes and fires the Warning action group as expected when the Warning threshold (but not the Alert threshold) is crossed

[elasticmachine]

Pinging @elastic/logs-metrics-ui (Team:logs-metrics-ui)

[neptunian]

Testing on BC2 pointed at release-oblt

• When creating an Inventory or Metrics alert, after I added but then removed the warning threshold, the preview messaging still mentions the warning threshold. Upon saving, the request still has the warning threshold.

• This is just a comment: Should "alert" be called "critical" like it is in the preview messaging? Find this a bit confusing. Is "Alert" another word for "Critical"?

[simianhacker]

Looks like we are still waiting on BC4 to make sure the warning test conditions are removed when the threshold is removed.

[sgrodzicki]

@simianhacker @neptunian could you please confirm things are working on BC5?

[neptunian]

Will confirm.

[neptunian]

Confirmed everything is working on BC5