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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
add_task(async function testStartingAutoScrollInAboutContent() {
await SpecialPowers.pushPrefEnv({
set: [
["general.autoScroll", true],
["middlemouse.contentLoadURL", false],
["test.events.async.enabled", true],
],
});
await BrowserTestUtils.withNewTab("about:support", async function (browser) {
let autoScroller;
let promiseStartAutoScroll = new Promise(resolve => {
let onPopupShown = event => {
if (event.originalTarget.id != "autoscroller") {
return;
}
autoScroller = event.originalTarget;
info('"popupshown" event is fired');
autoScroller.getBoundingClientRect(); // Flush layout of the autoscroller
resolve();
};
window.addEventListener("popupshown", onPopupShown, { capture: true });
registerCleanupFunction(() => {
window.removeEventListener("popupshown", onPopupShown, {
capture: true,
});
});
});
ok(!browser.isRemoteBrowser, "Browser should not be remote.");
await ContentTask.spawn(browser, null, async function () {
await ContentTaskUtils.waitForCondition(
() =>
content.document.documentElement.scrollHeight >
content.document.documentElement.clientHeight,
"The document should become scrollable"
);
});
await EventUtils.promiseNativeMouseEvent({
type: "mousemove",
target: browser,
offsetX: 10,
offsetY: 10, // XXX Assuming that there is no interactive content here.
});
await EventUtils.promiseNativeMouseEvent({
type: "mousedown",
button: 1, // middle click
target: browser,
offsetX: 10,
offsetY: 10,
});
info("Waiting to start autoscrolling");
await promiseStartAutoScroll;
Assert.notEqual(autoScroller, null, "Autoscrolling should be started");
await EventUtils.promiseNativeMouseEvent({
type: "mouseup",
button: 1, // middle click
target: browser,
offsetX: 10,
offsetY: 10,
}); // release implicit capture
EventUtils.synthesizeKey("KEY_Escape"); // Close autoscroller
await TestUtils.waitForCondition(
() => autoScroller.state == "closed",
"autoscroll should be canceled"
);
});
});