WebDriver executor ends each `testdriver` action with the `testharness.js` window selected

web-platform-tests / wpt

Test suites for Web platform specs — including WHATWG, W3C, and others

https://web-platform-tests.org/

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WebDriver executor ends each `testdriver` action with the `testharness.js` window selected #45137

Open jonathan-j-lee opened 6 months ago

jonathan-j-lee commented 6 months ago

See #44688 for full background.

The WebDriver implementation of testharness.js must switch to the testharness.js browsing context to run testharness_webdriver_resume.js. In a tabbed browser with popups in the same OS window as the testharness.js context, this will cause the popups to be hidden between test_driver.* calls, which may make some popup visibility interactions untestable.

CC @khushalsagar @jgraham

jgraham commented 5 months ago

Yes, solving this properly probably requires WebDriver-BiDi support in testdriver, so we can message navigables without actually focusing them.