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<!DOCTYPE html>
<meta charset="utf-8">
<title>Same-document traversal after a same-document navigations</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<!--
These tests are kind of silly since it's hard to imagine any other result:
same-document navigations are always synchronous so of course back() won't
cancel them.
Nevertheless they're nice as a basis from which to write corresponding app
history tests, where the consequences aren't as obvious.
-->
<body>
<script type="module">
import { createIframe, delay } from "./resources/helpers.mjs";
promise_test(async t => {
const iframe = await createIframe(t);
// Setup
iframe.contentWindow.location.hash = "#1";
await delay(t, 0);
iframe.contentWindow.location.hash = "#2";
await delay(t, 0);
iframe.contentWindow.location.hash = "#3";
iframe.contentWindow.history.back();
assert_equals(iframe.contentWindow.location.hash, "#3", "must not go back synchronously");
// Does go back eventually, and only one step
await t.step_wait(() => iframe.contentWindow.location.hash === "#2");
}, "fragment navigation then back()");
promise_test(async t => {
const iframe = await createIframe(t);
// Setup
iframe.contentWindow.history.pushState(null, "", "?1");
await delay(t, 0);
iframe.contentWindow.history.pushState(null, "", "?2");
await delay(t, 0);
iframe.contentWindow.history.pushState(null, "", "?3");
iframe.contentWindow.history.back();
assert_equals(iframe.contentWindow.location.search, "?3", "must not go back synchronously");
// Does go back eventually, and only one step
await t.step_wait(() => iframe.contentWindow.location.search === "?2");
}, "pushState then back()");
</script>
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