Bug 1936153 [wpt PR 49603] - DOM: Enable moveBefore() into Document n…

…odes, a=testonly

Automatic update from web-platform-tests
DOM: Enable moveBefore() into Document nodes

See
whatwg/dom#1307 (review).

[email protected]

Bug: 40150299
Change-Id: I01b148f65c9e9c2545e7287ae38eb0e39f57d3d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6081493
Commit-Queue: Dominic Farolino <[email protected]>
Reviewed-by: Noam Rosenthal <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1394297}

--

wpt-commits: 64e219541d6cf8165e11c2625bba82381044075f
wpt-pr: 49603

testing/web-platform/tests/dom/nodes/moveBefore/tentative/Node-moveBefore.html

@@ -87,8 +87,8 @@
 }, "moveBefore() on a cross-document target node throws a HierarchyRequestError");
 
 // Pre-move validity, step 3:
-// "If parent is not an Element node, then throw a "HierarchyRequestError"
-// DOMException."
+// "If parent is not a Document, DocumentFragment, or Element node, then throw a
+// "HierarchyRequestError" DOMException."
 //
 // https://whatpr.org/dom/1307.html#concept-node-ensure-pre-move-validity
 test(t => {
@@ -97,10 +97,20 @@
 
   assert_throws_dom("HIERARCHY_REQUEST_ERR", iframe.contentWindow.DOMException, () => {
     // Moving the body into the same place that it already is, which is a valid
-    // action in the normal case, when moving a node into an Element.
+    // action in the normal case, when moving an Element directly under the
+    // document. This is not `moveBefore()`-specific behavior; it is consistent
+    // with traditional Document insertion rules, just like `insertBefore()`.
     iframe.contentDocument.moveBefore(innerBody, null);
   });
 }, "moveBefore() into a Document throws a HierarchyRequestError");
+test(t => {
+  const iframe = document.body.appendChild(document.createElement('iframe'));
+  const comment = iframe.contentDocument.createComment("comment");
+  iframe.contentDocument.body.append(comment);
+
+  iframe.contentDocument.moveBefore(comment, null);
+  assert_equals(comment.parentNode, iframe.contentDocument);
+}, "moveBefore() CharacterData into a Document");
 test(t => {
   const comment = document.body.appendChild(document.createComment("comment"));
   const child = document.body.appendChild(document.createElement('p'));