Maniphest T405721

Create a stub experiment manager for JS tests
Closed, ResolvedPublic5 Estimated Story Points
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	phuedx
	Sep 26 2025, 10:38 AM

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Description

Background

In T404058: Add MetricsPlatform to gated extensions, I decided not to make MetricsPlatform a gated extension but instead to provide a stub experiment manager for JS tests, to help other teams to test their implementations (GrowthExperiments Extension <> Experiment Manager). This task covers doing that.

AC

Calling mw.xLab.mockExperimentEnrollment( name, group ) defines a mock experiment for the duration of the test and returns a mocked Experiment instance
Calling mw.xLab.getExperiment( name ) returns the same mocked Experiment instance
Calling mw.xLab.restoreMockExperiments() removes all mock experiments
Documentation
QA?

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	ext.testKitchen: Add test helpers	mediawiki/extensions/TestKitchen	master	+565 -12

Customize query in gerrit

Related Objects

Mentioned Here: T404058: Add MetricsPlatform to gated extensions

Event Timeline

phuedx created this task.Sep 26 2025, 10:38 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptSep 26 2025, 10:38 AM

phuedx triaged this task as High priority.Sep 26 2025, 10:39 AM

phuedx added a project: OKR-Work.

Michael subscribed.Nov 6 2025, 11:35 AM

JVanderhoop-WMF moved this task from Incoming to READY TO GROOM on the Test Kitchen board.Dec 2 2025, 5:32 PM

JVanderhoop-WMF updated the task description. (Show Details)Dec 9 2025, 4:32 PM

JVanderhoop-WMF set the point value for this task to 5.

phuedx lowered the priority of this task from High to Medium.Feb 3 2026, 4:32 PM

phuedx updated the task description. (Show Details)Mar 16 2026, 7:08 AM

Change #1251287 had a related patch set uploaded (by Phuedx; author: Phuedx):

[mediawiki/extensions/TestKitchen@master] ext.testKitchen: Add test helpers

https://gerrit.wikimedia.org/r/1251287

gerritbot added a project: Patch-For-Review.Mar 16 2026, 7:38 AM

phuedx claimed this task.Mar 16 2026, 7:38 AM

phuedx edited projects, added: Test Kitchen (Experiment Platform Sprint 21); removed: Test Kitchen.

phuedx moved this task from Ready for Development to Needs Review on the Test Kitchen (Experiment Platform Sprint 21) board.

Change #1251287 merged by jenkins-bot:

[mediawiki/extensions/TestKitchen@master] ext.testKitchen: Add test helpers

https://gerrit.wikimedia.org/r/1251287

Sfaci moved this task from Needs Review to To Deploy on the Test Kitchen (Experiment Platform Sprint 21) board.Mar 27 2026, 8:20 PM

Maintenance_bot removed a project: Patch-For-Review.Mar 27 2026, 8:30 PM

ReleaseTaggerBot added a project: MW-1.46-notes (1.46.0-wmf.22; 2026-03-31).Mar 27 2026, 9:00 PM

KReid-WMF moved this task from To Deploy to Done on the Test Kitchen (Experiment Platform Sprint 21) board.Apr 2 2026, 5:03 PM

KReid-WMF closed this task as Resolved.Apr 2 2026, 5:05 PM