1722354 - Evaluate what AddonTestUtils.promiseShutdownManager should do on the extension worker registration in the long run

Status: NEW

(WebExtensions :: General, task, P3)

Description

[Luca Greco [:rpl] [:luca] [:lgreco]]

In the long run we likely need to make AddonTestUtils.promiseShutdownManager to explicitly handle the extension service worker registration in a way that resemble the behavior expected by the extension service worker registration on browser shutdown.

At the moment there are only a few tests with test extensions including an extension service workers, and they do cover specific scenario and the tests themselves are taking care of creating the expected environment in which the test is meant to run (as an example of these tests see the patches attached to Bug 1638099), but in the long run more and more tests are meant to be executed on mv3 test extensions and at that point we will not want to repeat the environment setup in each of the test files and instead we should ensure that the test helpers are taking care of that.