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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<div id="buffer" style="height: 1000px; width: 1000px;"></div>
<div id="frag"></div>
<div style="height: 1000px; width: 1000px;"></div>
<script type="module">
import { ensureWindowLoadEventFired } from "../resources/helpers.mjs";
promise_test(async t => {
// Wait for after the load event so that the navigation doesn't get converted
// into a replace navigation.
await ensureWindowLoadEventFired(t);
assert_equals(window.scrollY, 0);
await navigation.navigate("#frag").finished;
// Scroll down 10px from #frag
window.scrollBy(0, 10);
let scrollY_frag_plus_10 = window.scrollY;
let intercept_resolve;
let navigate_event;
navigation.onnavigate = e => {
navigate_event = e;
e.intercept({ handler: () => new Promise(r => intercept_resolve = r),
scroll: "manual" });
};
let reload_promises = navigation.reload();
await reload_promises.committed;
// removing the <div id="buffer"> should scroll up 1000px.
assert_equals(window.scrollY, scrollY_frag_plus_10);
buffer.remove();
let scrollY_after_buffer_remove = window.scrollY;
assert_equals(scrollY_after_buffer_remove, scrollY_frag_plus_10 - 1000);
// scroll() should scroll to #frag, which is 10px up from the current location
navigate_event.scroll();
assert_equals(window.scrollY, scrollY_after_buffer_remove - 10);
// Finishing should not scroll.
intercept_resolve();
await reload_promises.finished;
assert_equals(window.scrollY, scrollY_after_buffer_remove - 10);
}, "scroll: scroll() should work on a reload navigation");
</script>
</body>
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