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Implement location.ancestorOrigins
This implements this attribute on Location and also adheres to the changes to the spec introduced in whatwg/html#11560 Tentative tests are also added in this patch. Differential Revision: https://phabricator.services.mozilla.com/D273393 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1085214 gecko-commit: f3415e1670266a11917af7fff4ba14afde5d7ca5 gecko-reviewers: necko-reviewers, webidl, dom-core, smaug, jesup, zcorpan, devtools-reviewers, nchevobbe
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‎html/browsers/history/the-location-interface/location-ancestor-origins-inactive-document.sub.html‎

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Location.ancestorOrigins lifetime behavior</title>
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<link rel="help" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#dom-location-ancestororigins">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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</head>
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<body>
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<script>
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function createIframeAndNavigate(test, src) {
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return new Promise(resolve => {
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const iframe = document.createElement("iframe");
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iframe.onload = () => {
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resolve(iframe);
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}
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iframe.src = src;
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document.body.appendChild(iframe);
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test.add_cleanup(() => {
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iframe.remove();
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});
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});
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}
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promise_test(async t => {
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assert_implements(location.ancestorOrigins, "location.ancestorOrigins not implemented");
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const iframe = await createIframeAndNavigate(t, "about:blank");
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assert_array_equals(
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iframe.contentWindow.location.ancestorOrigins,
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[location.origin],
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"Initial ancestorOrigins should match expected placeholder value"
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);
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const loc = iframe.contentWindow.location;
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iframe.remove();
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assert_array_equals(
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Array.from(loc.ancestorOrigins),
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[],
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"ancestorOrigins should be empty after iframe removal"
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);
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}, "location.ancestorOrigins returns empty list after iframe is removed and referenced Location's relevant document is null");
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promise_test(async t => {
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assert_implements(location.ancestorOrigins, "location.ancestorOrigins not implemented");
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const iframe = await createIframeAndNavigate(t, "about:blank");
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assert_array_equals(
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iframe.contentWindow.location.ancestorOrigins,
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[location.origin],
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"Initial ancestorOrigins should match expected placeholder value"
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);
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const loc = iframe.contentWindow.location;
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await new Promise(resolve => {
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iframe.onload = resolve;
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iframe.src = "http://{{hosts[alt][]}}:{{ports[http][0]}}/common/blank.html";
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});
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assert_array_equals(
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Array.from(loc.ancestorOrigins),
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[],
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"ancestorOrigins should be empty after iframe navigation"
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);
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}, "location.ancestorOrigins returns empty list when iframe navigated away and referenced Location's relevant document is null");
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</script>
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</body>
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</html>

‎html/browsers/history/the-location-interface/location-ancestor-origins-referrerpolicy-snapshot.html‎

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<!doctype html>
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<title>location.ancestorOrigins snapshot timing of referrerpolicy</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<body>
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<script>
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promise_test(async () => {
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assert_implements(location.ancestorOrigins);
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const iframe = document.createElement('iframe');
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iframe.src = '/common/blank.html?pipe=trickle(d1)';
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iframe.referrerPolicy = 'no-referrer';
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const loaded = new Promise(resolve => iframe.onload = resolve);
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document.body.append(iframe);
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// initial about:blank should see 'no-referrer' results
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assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), ['null']);
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iframe.referrerPolicy = '';
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await loaded;
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// The referrerpolicy attribute get snapshotted at step 16 of "beginning navigation"
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// https://html.spec.whatwg.org/#beginning-navigation and result should therefore,
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// still be ["null"], here.
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assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), ["null"]);
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});
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promise_test(async () => {
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assert_implements(location.ancestorOrigins);
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const iframe = document.createElement('iframe');
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iframe.referrerPolicy = 'no-referrer';
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const loaded = new Promise(resolve => iframe.onload = resolve);
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document.body.append(iframe);
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// initial about:blank should see 'no-referrer' results
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assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), ['null']);
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iframe.referrerPolicy = '';
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await loaded;
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await new Promise(resolve => {
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iframe.onload = resolve;
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iframe.src = '/common/blank.html?pipe=trickle(d1)';
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});
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assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), [window.origin]);
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});
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</script>

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