Re: Recommended way to force layout in a test?

On Tue, Apr 18, 2017 at 10:06 PM, Koji Ishii <kojii@chromium.org> wrote:
> Hi all,
>
> Sorry if this was discussed before, but is there a recommended way to force
> layout in a test?

This came up during a F2F meeting we had in Mountain View a couple of
months ago.

We thought it would be a good idea to add a new JS helper file which
contains a list of common operations like this, and let each UA
override its functions in their (potentially private) test environment
to ensure the desired effect.

For example, we can add style-helper.js with code like this:
StyleHelper = {
    updateStyle: (element) => { element.getBoundingClientRect() }
}

If we let UA test environment override StyleHelper, each engine can
use its own proprietary test-enviornment-only mechanism to force a
style update on the element.

- R. Niwa