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Test Info: Warnings
- This test gets skipped with pattern: true
- Manifest: browser/base/content/test/tabs/browser.toml
/* Any copyright is dedicated to the Public Domain.
"use strict";
/**
* Tests that while clicking to close tabs, the close button remains under the mouse
* even when an underflow happens.
*/
add_task(async function () {
// Disable tab animations
gReduceMotionOverride = true;
let downButton = gBrowser.tabContainer.arrowScrollbox._scrollButtonDown;
let closingTabsSpacer = gBrowser.tabContainer._closingTabsSpacer;
let arrowScrollbox = gBrowser.tabContainer.arrowScrollbox;
await BrowserTestUtils.overflowTabs(registerCleanupFunction, window);
// Make sure scrolling finished.
await new Promise(resolve => {
arrowScrollbox.addEventListener("scrollend", resolve, { once: true });
});
ok(
gBrowser.tabContainer.hasAttribute("overflow"),
"Tab strip should be overflowing"
);
isnot(downButton.clientWidth, 0, "down button has some width");
is(closingTabsSpacer.clientWidth, 0, "spacer has no width");
let originalCloseButtonLocation = getLastCloseButtonLocation();
info(
"Removing half the tabs and making sure the last close button doesn't move"
);
let numTabs = gBrowser.tabs.length / 2;
while (gBrowser.tabs.length > numTabs) {
let lastCloseButtonLocation = getLastCloseButtonLocation();
Assert.equal(
lastCloseButtonLocation.top,
originalCloseButtonLocation.top,
"The top of all close buttons should be equal"
);
Assert.equal(
lastCloseButtonLocation.bottom,
originalCloseButtonLocation.bottom,
"The bottom of all close buttons should be equal"
);
Assert.equal(
lastCloseButtonLocation.right,
originalCloseButtonLocation.right,
"The right side of the close button should remain consistent"
);
// Ignore 'left' since non-hovered tabs have their close button
// narrower to display more tab label.
EventUtils.synthesizeMouseAtCenter(getLastCloseButton(), {});
await new Promise(r => requestAnimationFrame(r));
}
ok(!gBrowser.tabContainer.hasAttribute("overflow"), "not overflowing");
ok(
gBrowser.tabContainer.hasAttribute("using-closing-tabs-spacer"),
"using spacer"
);
is(downButton.clientWidth, 0, "down button has no width");
isnot(closingTabsSpacer.clientWidth, 0, "spacer has some width");
});
function getLastCloseButton() {
let lastTab = gBrowser.tabs[gBrowser.tabs.length - 1];
return lastTab.closeButton;
}
function getLastCloseButtonLocation() {
let rect = getLastCloseButton().getBoundingClientRect();
return {
left: Math.round(rect.left),
top: Math.round(rect.top),
width: Math.round(rect.width),
height: Math.round(rect.height),
};
}
registerCleanupFunction(() => {
while (gBrowser.tabs.length > 1) {
BrowserTestUtils.removeTab(gBrowser.tabs[0]);
}
});