const PAGE = `
`;
function tick() {
return new Promise(r =>
requestAnimationFrame(() => requestAnimationFrame(r))
);
}
add_task(async function () {
const url = "data:text/html," + encodeURI(PAGE);
await BrowserTestUtils.withNewTab(
{
gBrowser,
url,
},
async function (browser) {
let popup = await openSelectPopup("click");
let arrowSB = popup.shadowRoot.querySelector(".menupopup-arrowscrollbox");
is(
arrowSB.getBoundingClientRect().width,
600,
"Should be the right size"
);
// Trigger a layout change that would cause us to layout the popup again,
// and change our menulist to be zero-size so that the anchor rect
// codepath is used. We should still use the anchor rect to expand our
// size.
await tick();
popup.closest("menulist").style.width = "0";
popup.style.minWidth = "2px";
await tick();
is(
arrowSB.getBoundingClientRect().width,
600,
"Should be the right size"
);
}
);
});