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add_task(function* ()
{
const kPrefName_AutoScroll = "general.autoScroll";
Services.prefs.setBoolPref(kPrefName_AutoScroll, false);
let dataUri = 'data:text/html,<html><body id="i" style="overflow-y: scroll"><div style="height: 2000px"></div>\
<iframe id="iframe" style="display: none;"></iframe>\
</body></html>';
let loadedPromise = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
gBrowser.loadURI(dataUri);
yield loadedPromise;
yield BrowserTestUtils.synthesizeMouse("#i", 50, 50, { button: 1 },
gBrowser.selectedBrowser);
yield ContentTask.spawn(gBrowser.selectedBrowser, { }, function* () {
var iframe = content.document.getElementById("iframe");
if (iframe) {
var e = new iframe.contentWindow.PageTransitionEvent("pagehide",
{ bubbles: true,
cancelable: true,
persisted: false });
iframe.contentDocument.dispatchEvent(e);
iframe.contentDocument.documentElement.dispatchEvent(e);
}
});
yield BrowserTestUtils.synthesizeMouse("#i", 100, 100,
{ type: "mousemove", clickCount: "0" },
gBrowser.selectedBrowser);
// If scrolling didn't work, we wouldn't do any redraws and thus time out, so
// request and force redraws to get the chance to check for scrolling at all.
yield new Promise(resolve => window.requestAnimationFrame(resolve));
let msg = yield ContentTask.spawn(gBrowser.selectedBrowser, { }, function* () {
// Skip the first animation frame callback as it's the same callback that
// the browser uses to kick off the scrolling.
return new Promise(resolve => {
function checkScroll() {
let msg = "";
let elem = content.document.getElementById('i');
if (elem.scrollTop != 0) {
msg += "element should not have scrolled vertically";
}
if (elem.scrollLeft != 0) {
msg += "element should not have scrolled horizontally";
}
resolve(msg);
}
content.requestAnimationFrame(checkScroll);
});
});
ok(!msg, "element scroll " + msg);
// restore the changed prefs
if (Services.prefs.prefHasUserValue(kPrefName_AutoScroll))
Services.prefs.clearUserPref(kPrefName_AutoScroll);
// wait for focus to fix a failure in the next test if the latter runs too soon.
yield SimpleTest.promiseFocus();
});
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