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<?xml version="1.0"?>
<window id="321671Test"
width="600"
height="600"
onload="setTimeout(runTest, 0);"
<script type="application/javascript" src="docshell_helpers.js" />
<script type="application/javascript"><![CDATA[
Services.prefs.setBoolPref("browser.navigation.requireUserInteraction", false);
// Maximum number of entries in the bfcache for this session history.
// This number is hardcoded in docshell code. In the test, we'll
// navigate through enough pages so that we hit one that's been
// evicted from the bfcache because it's farther from the current
// page than this number.
const MAX_BFCACHE_PAGES = 3;
////
// forwards through pages when bfcache is enabled.
//
async function runTest()
{
// Variable to hold the scroll positions of the test pages.
var scrollPositions = [];
// Make sure bfcache is on.
enableBFCache(true);
// Load enough test pages that so the first one is evicted from the
// bfcache, scroll down on each page, and save the
// current scroll position before continuing. Verify that each
// page we're navigating away from is initially put into the bfcache.
for (var i = 0; i <= MAX_BFCACHE_PAGES + 1; i++) {
let eventsToListenFor = ["pageshow"];
let expectedEvents = [ { type: "pageshow",
if (i > 0) {
eventsToListenFor.push("pagehide");
expectedEvents.unshift({ type: "pagehide",
persisted: true,
}
await promisePageNavigation( {
"</title></head>" +
"<body><table border='1' width='300' height='1000'>" +
"<tbody><tr><td>" +
" page " + (i + 1) + ": foobar foobar foobar foobar " +
"</td></tr></tbody></table> " +
"</body></html>",
eventsToListenFor,
expectedEvents,
} );
let { initialScrollY, scrollY } = await SpecialPowers.spawn(TestWindow.getBrowser(), [i], (i) => {
let initialScrollY = content.scrollY;
content.scrollByLines(10 + (2 * i));
return { initialScrollY, scrollY: content.scrollY };
});
is(initialScrollY, 0,
"Page initially has non-zero scrollY position");
ok(scrollY > 0,
"Page has zero scrollY position after scrolling");
scrollPositions[i] = scrollY;
}
// Go back to the first page, one page at a time. For each 'back'
// action, verify that its vertical scroll position is restored
// correctly. Verify that the last page in the sequence
// does not come from the bfcache. Again verify that all pages
// that we navigate away from are initially
// stored in the bfcache.
for (i = MAX_BFCACHE_PAGES + 1; i > 0; i--) {
await promisePageNavigation( {
back: true,
eventsToListenFor: ["pageshow", "pagehide"],
expectedEvents: [ { type: "pagehide",
persisted: true },
{ type: "pageshow",
persisted: i > 1 } ],
} );
is(await SpecialPowers.spawn(TestWindow.getBrowser(), [], () => {
return content.scrollY;
}), scrollPositions[i-1],
"Scroll position not restored while going back!");
}
// Traverse history forward now, and verify scroll position is still
// restored. Similar to the backward traversal, verify that all
// but the last page in the sequence comes from the bfcache. Also
// verify that all of the pages get stored in the bfcache when we
// navigate away from them.
for (i = 1; i <= MAX_BFCACHE_PAGES + 1; i++) {
await promisePageNavigation( {
forward: true,
eventsToListenFor: ["pageshow", "pagehide"],
expectedEvents: [ { type: "pagehide",
persisted: true,
{ type: "pageshow",
persisted: i < MAX_BFCACHE_PAGES + 1,
} );
is(await SpecialPowers.spawn(TestWindow.getBrowser(), [], () => {
return content.scrollY;
}), scrollPositions[i],
"Scroll position not restored while going forward!");
}
Services.prefs.clearUserPref("browser.navigation.requireUserInteraction");
// Tell the framework the test is finished.
finish();
}
]]></script>
<browser type="content" primary="true" flex="1" id="content" remote="true" maychangeremoteness="true" />
</window>