iframe-src-aboutblank-navigate-immediately.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="UTF-8">

<title>Navigations immediately after appending iframe with src='about:blank'</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="resources/helpers.js"></script>

<body></body>

<script>

/*

  When an iframe is created with src="about:blank", it will stay on the initial

  empty document. These tests verify the behavior of navigations that happen

  immediately after the iframe is created, which should result in replacement.

*/

"use strict";

const url1 = "/common/blank.html?1";

promise_test(async t => {

  const startingHistoryLength = history.length;

  // Create an iframe with src set to about:blank. Per the HTML Standard, this

  // stays on the "initial about:blank Document" [1], because the "process the

  // iframe attributes" algorithm [2] catches the "about:blank" navigation and

  // fires a special synchronous `load` event at the initial about:blank

  // Document, instead of replacing it with a non-initial, second about:blank

  // Document. This is documented in the note at the end of [3].

//

  // [1]: https://html.spec.whatwg.org/#is-initial-about:blank.

  // [2]: https://html.spec.whatwg.org/#process-the-iframe-attributes

  // [3]: https://html.spec.whatwg.org/#completely-finish-loading

  const iframe = insertIframeWithAboutBlankSrc(t);

  assert_equals(history.length, startingHistoryLength,

    "Inserting iframe with src='about:blank' must not change history.length");

  // Trigger a navigation from the initial about:blank Document, to url1 through

  // the iframe's src attribute. Because we're navigating from the initial

  // about:blank Document, the navigation should be a replacement.

  iframe.src = url1;

  // Wait for the latest navigation to finish.

  await waitForLoad(t, iframe, url1);

  assert_equals(history.length, startingHistoryLength,

    "history.length must not change after normal navigation from initial " +

    "about:blank Document");

}, "Navigating away from the initial about:blank Document to a different " +

    "one, with src");

promise_test(async t => {

  const startingHistoryLength = history.length;

  const iframe = insertIframeWithAboutBlankSrc(t);

  assert_equals(history.length, startingHistoryLength,

    "Inserting iframe with src='about:blank' must not change history.length");

  // Trigger a navigation from the initial about:blank Document, to url1 through

  // location.href. Because we're navigating from the initial about:blank

  // Document, the navigation should be a replacement.

  iframe.contentWindow.location.href = url1;

  await waitForLoad(t, iframe, url1);

  assert_equals(history.length, startingHistoryLength,

    "history.length must not change after normal navigation on initial empty document");

}, "Navigating to a different document with location.href");

promise_test(async t => {

  const startingHistoryLength = history.length;

  const iframe = insertIframeWithAboutBlankSrc(t);

  assert_equals(history.length, startingHistoryLength,

    "Inserting iframe with src='about:blank' must not change history.length");

  // Trigger a navigation from the initial about:blank Document, to url1 through

  // location.assign(). Because we're navigating from the initial about:blank

  // Document, the navigation should be a replacement.

  iframe.contentWindow.location.assign(url1);

  await waitForLoad(t, iframe, url1);

  assert_equals(history.length, startingHistoryLength,

    "history.length must not change after normal navigation on initial empty document");

}, "Navigating to a different document with location.assign");

promise_test(async t => {

  const startingHistoryLength = history.length;

  const iframe = insertIframeWithAboutBlankSrc(t);

  assert_equals(history.length, startingHistoryLength,

    "Inserting iframe with src='about:blank' must not change history.length");

  // Trigger a navigation from the initial about:blank Document, to url1 through

  // window.open(). Because we're navigating from the initial about:blank

  // Document, the navigation should be a replacement.

  iframe.contentWindow.open(url1, "_self");

  await waitForLoad(t, iframe, url1);

  assert_equals(history.length, startingHistoryLength,

    "history.length must not change after normal navigation on initial empty document");

}, "Navigating to a different document with window.open");

promise_test(async t => {

  const startingHistoryLength = history.length;

  const iframe = insertIframeWithAboutBlankSrc(t);

  assert_equals(history.length, startingHistoryLength,

    "Inserting iframe with src='about:blank' must not change history.length");

  // Trigger a navigation from the initial about:blank Document, to url1 through

  // clicking an `<a>` element. Because we're navigating from the initial

  // about:blank Document, the navigation should be a replacement.

  const a = iframe.contentDocument.createElement("a");

  a.href = url1;

  iframe.contentDocument.body.appendChild(a);

  a.click();

  await waitForLoad(t, iframe, url1);

  assert_equals(history.length, startingHistoryLength,

    "history.length must not change after normal navigation on initial empty document");

}, "Navigating to a different document with link click");

promise_test(async t => {

  const startingHistoryLength = history.length;

  const iframe = insertIframeWithAboutBlankSrc(t);

  assert_equals(history.length, startingHistoryLength,

    "Inserting iframe with src='about:blank' must not change history.length");

  // Trigger a navigation from the initial about:blank Document, to url1 through

  // a form submission. Because we're navigating from the initial about:blank

  // Document, the navigation should be a replacement.

  const form = iframe.contentDocument.createElement("form");

  form.action = "/common/blank.html";

  iframe.contentDocument.body.appendChild(form);

  const input = iframe.contentDocument.createElement("input");

  input.type = "hidden";

  input.name = "1";

  form.append(input);

  form.submit();

  await waitForLoad(t, iframe, url1 + "=");

  assert_equals(history.length, startingHistoryLength,

    "history.length must not change after normal navigation on initial empty document");

}, "Navigating to a different document with form submission");

</script>