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Revert "remove test for #528 as we removed that fix"

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This reverts commit 42030796c7.
This commit is contained in:
Bruno Windels 2019-03-01 16:08:58 +01:00
parent 37593c117a
commit 65807c7a66
1 changed files with 53 additions and 0 deletions
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53
test/components/structures/ScrollPanel-test.js
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@ -224,4 +224,57 @@ describe('ScrollPanel', function() {
expect(scrollingDiv.scrollTop).toEqual(1950);
});
});
it('should not get stuck in #528 workaround', function(done) {
let events = [];
Promise.resolve().then(() => {
// initialise with a bunch of events
for (let i = 0; i < 40; i++) {
events.push(i);
}
tester.setTileKeys(events);
expect(tester.fillCounts.b).toEqual(1);
expect(tester.fillCounts.f).toEqual(2);
expect(scrollingDiv.scrollHeight).toEqual(6050); // 40*150 + 50
expect(scrollingDiv.scrollTop).toEqual(6050 - 600);
// try to scroll up, to a non-integer offset.
tester.scrollPanel().scrollToToken("30", -101/3);
expect(scrollingDiv.scrollTop).toEqual(4616); // 31*150 - 34
// wait for the scroll event to land
return tester.awaitScroll(); // fails
}).then(() => {
expect(tester.lastScrollEvent).toEqual(4616);
// Now one more event; this will make it reset the scroll, but
// because the delta will be less than 1, will not trigger a
// scroll event, this leaving recentEventScroll defined.
console.log("Adding event 50");
events.push(50);
tester.setTileKeys(events);
// wait for the scrollpanel to stop trying to paginate
}).then(() => {
// Now, simulate hitting "scroll to bottom".
events = [];
for (let i = 100; i < 120; i++) {
events.push(i);
}
tester.setTileKeys(events);
tester.scrollPanel().scrollToBottom();
// wait for the scroll event to land
return tester.awaitScroll(); // fails
}).then(() => {
expect(scrollingDiv.scrollTop).toEqual(20*150 + 50 - 600);
// simulate a user-initiated scroll on the div
scrollingDiv.scrollTop = 1200;
return tester.awaitScroll();
}).then(() => {
expect(scrollingDiv.scrollTop).toEqual(1200);
}).done(done);
});
});