node-realm-adoption-after-frame-removal.html

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This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /dom/nodes/node-realm-adoption-after-frame-removal.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>A node's creation realm is preserved when its creating frame is removed before adoption</title>

<link rel=help href="https://dom.spec.whatwg.org/#concept-create-node">

<link rel=help href="https://dom.spec.whatwg.org/#concept-node-adopt">

<link rel=help href="https://github.com/whatwg/dom/issues/977">

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

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

<body>

<script>

// The <p>/<b> nodes are built by the HTML parser and never touched from script

// before the frame is removed, so no JS object is ever created for them in the

// inner realm. This checks that the creation realm is recorded on the node when

// it is created, rather than derived on demand from a pre-existing JS object: by

// adoption time the inner realm is gone and can no longer be consulted.

// Interface objects are captured before removal since a detached window can no

// longer be queried. Each test asserts on both a direct child and a deep

// descendant so the realm is checked throughout the parsed subtree.

function freshIframe() {

  const iframe = document.createElement("iframe");

  document.body.appendChild(iframe);

  return iframe;

test(() => {

  const iframe = freshIframe();

  const inner = iframe.contentWindow;

  const InnerParagraph = inner.HTMLParagraphElement;

  const InnerBold = inner.HTMLElement;

  const container = inner.document.createElement("div");

  container.innerHTML = "<p><b>x</b></p>";

  inner.document.body.appendChild(container);

  container.remove();

  iframe.remove();

  document.body.appendChild(container);

  const p = container.querySelector("p");

  const b = container.querySelector("b");

  assert_equals(p.ownerDocument, document, "adopted into the top-level document");

  assert_true(p instanceof InnerParagraph, "keeps its creation realm");

  assert_true(b instanceof InnerBold, "deep descendant keeps its creation realm");

}, "Never-wrapped node keeps its creation realm: subtree detached, iframe removed, then adopted");

test(() => {

  const iframe = freshIframe();

  const inner = iframe.contentWindow;

  const InnerParagraph = inner.HTMLParagraphElement;

  const InnerBold = inner.HTMLElement;

  const container = inner.document.createElement("div");

  container.innerHTML = "<p><b>x</b></p>";

  inner.document.body.appendChild(container);

  iframe.remove(); // removed without first detaching the subtree

  document.body.appendChild(container);

  const p = container.querySelector("p");

  const b = container.querySelector("b");

  assert_equals(p.ownerDocument, document, "adopted into the top-level document");

  assert_true(p instanceof InnerParagraph, "keeps its creation realm");

  assert_true(b instanceof InnerBold, "deep descendant keeps its creation realm");

}, "Never-wrapped node keeps its creation realm: iframe removed before adoption (subtree not pre-detached)");

// The tests above reach the adopted nodes through `container`, whose JS object is

// in the creation realm. The test below reaches them through the adopting

// document instead, so the realm must be preserved independently of the access

// path.

test(() => {

  const iframe = freshIframe();

  const inner = iframe.contentWindow;

  const InnerParagraph = inner.HTMLParagraphElement;

  const InnerBold = inner.HTMLElement;

  const container = inner.document.createElement("div");

  container.innerHTML = "<p id=frame-removal-node><b id=frame-removal-node-deep>x</b></p>";

  inner.document.body.appendChild(container);

  iframe.remove();

  document.body.appendChild(container);

  const p = document.getElementById("frame-removal-node"); // reached through the top-level document

  const b = document.getElementById("frame-removal-node-deep");

  assert_equals(p.ownerDocument, document, "adopted into the top-level document");

  assert_true(p instanceof InnerParagraph, "keeps its creation realm regardless of access path");

  assert_true(b instanceof InnerBold, "deep descendant keeps its creation realm regardless of access path");

}, "Node reached through the adopting document still reports its creation realm (frame removed before adoption)");

</script>