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<!DOCTYPE html>
<meta charset="utf-8">
<title>Same-document traversals during same-document traversals (using pushState())</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<!--
Compare this to cross-document-traversal-cross-document-traversal.html. Since
there are no network loads or document unloads to cancel tasks, both
traversals should observably go through. Target step calculation for the
second traversal should take place after the first traversal is finished. So
we end up with both traversals observable in sequence.
-->
<body>
<script type="module">
import { createIframe, delay, waitForPopstate } from "./resources/helpers.mjs";
promise_test(async t => {
const iframe = await createIframe(t);
// Setup
iframe.contentWindow.history.pushState(1, "", "/1");
assert_equals(iframe.contentWindow.location.pathname, "/1", "setup /1");
iframe.contentWindow.history.pushState(2, "", "/2");
assert_equals(iframe.contentWindow.location.pathname, "/2", "setup /2");
iframe.contentWindow.history.pushState(3, "", "/3");
assert_equals(iframe.contentWindow.location.pathname, "/3", "setup /3");
iframe.contentWindow.history.back();
await waitForPopstate(iframe.contentWindow);
assert_equals(iframe.contentWindow.location.pathname, "/2", "we made our way to /2 for setup");
iframe.contentWindow.history.back();
assert_equals(iframe.contentWindow.location.pathname, "/2", "must not go back synchronously");
iframe.contentWindow.history.forward();
assert_equals(iframe.contentWindow.location.pathname, "/2", "must not go forward synchronously");
const event1 = await waitForPopstate(iframe.contentWindow);
assert_equals(event1.state, 1, "state 1");
// Cannot test iframe.contentWindow.location.pathname since the second history
// traversal task is racing with the fire an event task, so we don't know
// which will happen first.
const event2 = await waitForPopstate(iframe.contentWindow);
assert_equals(event2.state, 2, "state 2");
assert_equals(iframe.contentWindow.location.pathname, "/2");
}, "same-document traversals in opposite directions: queued up");
promise_test(async t => {
const iframe = await createIframe(t);
// Setup
iframe.contentWindow.history.pushState(1, "", "/1");
assert_equals(iframe.contentWindow.location.pathname, "/1", "setup /1");
iframe.contentWindow.history.pushState(2, "", "/2");
assert_equals(iframe.contentWindow.location.pathname, "/2", "we made our way to /2 for setup");
iframe.contentWindow.history.back();
assert_equals(iframe.contentWindow.location.pathname, "/2", "must not go back synchronously");
iframe.contentWindow.history.forward();
assert_equals(iframe.contentWindow.location.pathname, "/2", "must not go forward synchronously");
const event1 = await waitForPopstate(iframe.contentWindow);
assert_equals(event1.state, 1, "state 1");
// Cannot test iframe.contentWindow.location.pathname since the second history
// traversal task is racing with the fire an event task, so we don't know
// which will happen first.
const event2 = await waitForPopstate(iframe.contentWindow);
assert_equals(event2.state, 2, "state 2");
assert_equals(iframe.contentWindow.location.pathname, "/2");
}, "same-document traversals in opposite directions, second traversal invalid at queuing time: queued up");
promise_test(async t => {
const iframe = await createIframe(t);
// Setup
iframe.contentWindow.history.pushState(1, "", "/1");
assert_equals(iframe.contentWindow.location.pathname, "/1", "setup /1");
iframe.contentWindow.history.pushState(2, "", "/2");
assert_equals(iframe.contentWindow.location.pathname, "/2", "setup /2");
iframe.contentWindow.history.pushState(3, "", "/3");
assert_equals(iframe.contentWindow.location.pathname, "/3", "we made our way to /3 for setup");
iframe.contentWindow.history.back();
assert_equals(iframe.contentWindow.location.pathname, "/3", "must not go back synchronously (1)");
iframe.contentWindow.history.back();
assert_equals(iframe.contentWindow.location.pathname, "/3", "must not go back synchronously (2)");
const event1 = await waitForPopstate(iframe.contentWindow);
assert_equals(event1.state, 2, "state 1");
// Cannot test iframe.contentWindow.location.pathname since the second history
// traversal task is racing with the fire an event task, so we don't know
// which will happen first.
const event2 = await waitForPopstate(iframe.contentWindow);
assert_equals(event2.state, 1, "state 2");
assert_equals(iframe.contentWindow.location.pathname, "/1");
}, "same-document traversals in the same (back) direction: queue up");
promise_test(async t => {
const iframe = await createIframe(t);
// Setup
iframe.contentWindow.history.pushState(1, "", "/1");
assert_equals(iframe.contentWindow.location.pathname, "/1", "setup /1");
iframe.contentWindow.history.pushState(2, "", "/2");
assert_equals(iframe.contentWindow.location.pathname, "/2", "setup /2");
iframe.contentWindow.history.pushState(3, "", "/3");
assert_equals(iframe.contentWindow.location.pathname, "/3", "setup /3");
iframe.contentWindow.history.back();
await waitForPopstate(iframe.contentWindow);
assert_equals(iframe.contentWindow.location.pathname, "/2", "setup /2 again");
iframe.contentWindow.history.back();
await waitForPopstate(iframe.contentWindow);
assert_equals(iframe.contentWindow.location.pathname, "/1", "we made our way to /1 for setup");
iframe.contentWindow.history.forward();
assert_equals(iframe.contentWindow.location.pathname, "/1", "must not go forward synchronously (1)");
iframe.contentWindow.history.forward();
assert_equals(iframe.contentWindow.location.pathname, "/1", "must not go forward synchronously (2)");
const event1 = await waitForPopstate(iframe.contentWindow);
assert_equals(event1.state, 2, "state 1");
// Cannot test iframe.contentWindow.location.pathname since the second history
// traversal task is racing with the fire an event task, so we don't know
// which will happen first.
const event2 = await waitForPopstate(iframe.contentWindow);
assert_equals(event2.state, 3, "state 2");
assert_equals(iframe.contentWindow.location.pathname, "/3");
}, "same-document traversals in the same (forward) direction: queue up");
</script>
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