Resync web-platform-tests/custom-elements

https://bugs.webkit.org/show_bug.cgi?id=250362

Reviewed by Tim Nguyen.

Resync web platform tests for custom elements as of ea3e60a.

* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement-customized-builtins-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement-customized-builtins.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement.html:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS-customized-builtins-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS-customized-builtins.html: Copied from LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS.html:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/custom-element-registry/define-customized-builtins-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/custom-element-registry/define-customized-builtins.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/custom-element-registry/define-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/custom-element-registry/define.html:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/custom-element-registry/w3c-import.log:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/htmlconstructor/newtarget-customized-builtins-expected.txt: Copied from LayoutTests/imported/w3c/web-platform-tests/custom-elements/htmlconstructor/newtarget-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/htmlconstructor/newtarget-customized-builtins.html: Copied from LayoutTests/imported/w3c/web-platform-tests/custom-elements/htmlconstructor/newtarget.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/htmlconstructor/newtarget-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/htmlconstructor/newtarget.html:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/htmlconstructor/w3c-import.log:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/parser/serializing-html-fragments-customized-builtins-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/parser/serializing-html-fragments-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/parser/serializing-html-fragments-customized-builtins.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/parser/serializing-html-fragments.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/parser/w3c-import.log:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/pseudo-class-defined-customized-builtins-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/pseudo-class-defined-customized-builtins.html: Copied from LayoutTests/imported/w3c/web-platform-tests/custom-elements/pseudo-class-defined.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/pseudo-class-defined-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/pseudo-class-defined.html:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLModElement-expected.txt: Removed.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLOptGroupElement-expected.txt: Removed.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLAreaElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLAreaElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLAreaElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLAreaElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLBaseElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLBaseElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLBaseElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLBaseElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLButtonElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLButtonElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLButtonElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLButtonElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLCanvasElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLCanvasElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLCanvasElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLCanvasElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLDataElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLDataElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLDataElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLDataElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLDetailsElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLDetailsElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLDetailsElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLDetailsElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLEmbedElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLEmbedElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLEmbedElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLEmbedElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLFieldSetElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLFieldSetElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLFieldSetElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLFieldSetElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLImageElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLImageElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLImageElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLImageElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLInputElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLInputElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLInputElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLInputElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLLIElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLLIElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLLIElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLLIElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLLabelElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLLabelElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLLabelElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLLabelElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMapElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMapElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMapElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMapElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMediaElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMediaElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMediaElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMediaElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMetaElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMetaElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMetaElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMetaElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMeterElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMeterElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLMeterElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLMeterElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLModElement-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLModElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLModElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLOListElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLOListElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLOListElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLOListElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLOptGroupElement-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLOptGroupElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLParamElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLParamElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLParamElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLParamElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLProgressElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLProgressElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLProgressElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLProgressElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLQuoteElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLQuoteElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLQuoteElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLQuoteElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLSlotElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLSlotElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLSlotElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLSlotElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLSourceElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLSourceElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLSourceElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLSourceElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLStyleElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLStyleElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLStyleElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLStyleElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLTableCellElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLTableCellElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLTableCellElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLTableCellElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLTableColElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLTableColElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLTableColElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLTableColElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLTimeElement-expected.txt: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLTimeElement-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/HTMLTimeElement.html: Renamed from LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/HTMLTimeElement.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/customized-builtins/w3c-import.log: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/reactions/w3c-import.log:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Document-importNode-customized-builtins-expected.txt: Copied from LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Document-importNode-expected.txt.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Document-importNode-customized-builtins.html: Copied from LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Document-importNode.html.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Document-importNode-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Document-importNode.html:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Node-cloneNode-customized-builtins-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Node-cloneNode-customized-builtins.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Node-cloneNode-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/Node-cloneNode.html:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/upgrading/w3c-import.log:
* LayoutTests/imported/w3c/web-platform-tests/custom-elements/w3c-import.log:

Canonical link: https://commits.webkit.org/258711@main

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement-customized-builtins-expected.txt

@@ -0,0 +1,6 @@
+
+PASS document.createElement must create an instance of autonomous custom elements when it has is attribute
+FAIL document.createElement()'s second argument is to be ignored when it's a string assert_true: expected true got false
+FAIL document.createElement must report an exception thrown by a custom built-in element constructor assert_throws_exactly: function "function () { new ThrowCustomBuiltinElement; }" threw object "TypeError: Illegal constructor" but we expected it to throw object "[object Object]"
+FAIL document.createElement with unknown "is" value should create "undefined" state element assert_true: Undefined element is upgraded on connecting to a document expected true got false
+

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement-customized-builtins.html

@@ -0,0 +1,104 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Custom Elements: document.createElement should create a customized builtin element with synchronous custom elements flag set</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/custom-elements-helpers.js"></script>
+</head>
+<body>
+<div id="log"></div>
+<script>
+setup({allow_uncaught_exception:true});
+
+function assert_reports(expected, testFunction, message) {
+    var uncaughtError = null;
+    window.onerror = function (message, url, lineNumber, columnNumber, error) { uncaughtError = error; return true; }
+    testFunction();
+    if (typeof(expected) == 'string')
+        assert_equals(uncaughtError, expected, message);
+    else if (expected && 'name' in expected)
+        assert_equals(uncaughtError.name, expected.name, message);
+    else
+      assert_equals(uncaughtError, expected, message);
+    window.onerror = null;
+}
+
+test(function () {
+    class AutonomousCustomElement extends HTMLElement {};
+    class IsCustomElement extends HTMLElement {};
+
+    customElements.define('autonomous-custom-element', AutonomousCustomElement);
+    customElements.define('is-custom-element', IsCustomElement);
+
+    var instance = document.createElement('autonomous-custom-element', { is: 'is-custom-element'});
+
+    assert_true(instance instanceof AutonomousCustomElement);
+    assert_equals(instance.localName, 'autonomous-custom-element');
+    assert_equals(instance.namespaceURI, 'http://www.w3.org/1999/xhtml', 'A custom element HTML must use HTML namespace');
+
+    var instance2 = document.createElement('undefined-element', { is: 'is-custom-element'});
+    assert_false(instance2.matches(':defined'));
+    class DefinedLater extends HTMLElement {}
+    customElements.define('undefined-element', DefinedLater);
+    document.body.appendChild(instance2);
+    assert_true(instance2 instanceof DefinedLater);
+}, 'document.createElement must create an instance of autonomous custom elements when it has is attribute');
+
+test(() => {
+    class SuperP extends HTMLParagraphElement {}
+    customElements.define("super-p", SuperP, { extends: "p" });
+
+    const superP = document.createElement("p", { is: "super-p" });
+    assert_true(superP instanceof HTMLParagraphElement);
+    assert_true(superP instanceof SuperP);
+    assert_equals(superP.localName, "p");
+
+    const notSuperP = document.createElement("p", "super-p");
+    assert_true(notSuperP instanceof HTMLParagraphElement);
+    assert_false(notSuperP instanceof SuperP);
+    assert_equals(notSuperP.localName, "p");
+}, "document.createElement()'s second argument is to be ignored when it's a string");
+
+test(function () {
+    var exceptionToThrow = {name: 'exception thrown by a custom constructor'};
+    class ThrowCustomBuiltinElement extends HTMLDivElement {
+        constructor()
+        {
+            super();
+            if (exceptionToThrow)
+                throw exceptionToThrow;
+        }
+    };
+    customElements.define('throw-custom-builtin-element', ThrowCustomBuiltinElement, { extends: 'div' });
+
+    assert_throws_exactly(exceptionToThrow, function () { new ThrowCustomBuiltinElement; });
+    var instance;
+    assert_reports(exceptionToThrow, function () { instance = document.createElement('div', { is: 'throw-custom-builtin-element' }); });
+    assert_equals(instance.localName, 'div');
+    assert_true(instance instanceof HTMLDivElement);
+
+    exceptionToThrow = false;
+    var instance = document.createElement('div', { is: 'throw-custom-builtin-element' });
+    assert_true(instance instanceof ThrowCustomBuiltinElement);
+    assert_equals(instance.localName, 'div');
+
+}, 'document.createElement must report an exception thrown by a custom built-in element constructor');
+
+test(() => {
+  class MyElement extends HTMLDivElement {}
+
+  // createElement with unknown 'is' should not throw.
+  // https://github.com/w3c/webcomponents/issues/608
+  let div = document.createElement('div', { is: 'my-div' });
+  assert_false(div instanceof MyElement);
+  assert_false(div.hasAttribute('is'));
+
+  customElements.define('my-div', MyElement, { extends: 'div' });
+  document.body.appendChild(div);
+  assert_true(div instanceof MyElement, 'Undefined element is upgraded on connecting to a document');
+}, 'document.createElement with unknown "is" value should create "undefined" state element');
+
+</script>
+</body>
+</html>

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement-expected.txt

@@ -1,7 +1,5 @@
 
 PASS document.createElement must create an instance of custom elements
-PASS document.createElement must create an instance of autonomous custom elements when it has is attribute
-FAIL document.createElement()'s second argument is to be ignored when it's a string assert_true: expected true got false
 PASS document.createElement must report a TypeError when the result of Construct is not a DOM node
 PASS document.createElement must report a TypeError when the result of Construct is a TextNode
 PASS document.createElement must report a NotSupportedError when attribute is added by setAttribute during construction
@@ -36,7 +34,5 @@ PASS document.createElement must report a NotSupportedError when the element is
 PASS document.createElement must not report a NotSupportedError when the element is adopted back from a an HTML document fetched by XHR during construction
 PASS document.createElement must report a NotSupportedError when the local name of the element does not match that of the custom element
 PASS document.createElement must report an exception thrown by a custom element constructor
-FAIL document.createElement must report an exception thrown by a custom built-in element constructor assert_throws_exactly: function "function () { new ThrowCustomBuiltinElement; }" threw object "TypeError: Illegal constructor" but we expected it to throw object "[object Object]"
-FAIL document.createElement with unknown "is" value should create "undefined" state element assert_true: Undefined element is upgraded on connecting to a document expected true got false
 PASS document.createElement with undefined options value should be upgraded.
 

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElement.html

@@ -29,42 +29,6 @@
 
 }, 'document.createElement must create an instance of custom elements');
 
-test(function () {
-    class AutonomousCustomElement extends HTMLElement {};
-    class IsCustomElement extends HTMLElement {};
-
-    customElements.define('autonomous-custom-element', AutonomousCustomElement);
-    customElements.define('is-custom-element', IsCustomElement);
-
-    var instance = document.createElement('autonomous-custom-element', { is: 'is-custom-element'});
-
-    assert_true(instance instanceof AutonomousCustomElement);
-    assert_equals(instance.localName, 'autonomous-custom-element');
-    assert_equals(instance.namespaceURI, 'http://www.w3.org/1999/xhtml', 'A custom element HTML must use HTML namespace');
-
-    var instance2 = document.createElement('undefined-element', { is: 'is-custom-element'});
-    assert_false(instance2.matches(':defined'));
-    class DefinedLater extends HTMLElement {}
-    customElements.define('undefined-element', DefinedLater);
-    document.body.appendChild(instance2);
-    assert_true(instance2 instanceof DefinedLater);
-}, 'document.createElement must create an instance of autonomous custom elements when it has is attribute');
-
-test(() => {
-    class SuperP extends HTMLParagraphElement {}
-    customElements.define("super-p", SuperP, { extends: "p" });
-
-    const superP = document.createElement("p", { is: "super-p" });
-    assert_true(superP instanceof HTMLParagraphElement);
-    assert_true(superP instanceof SuperP);
-    assert_equals(superP.localName, "p");
-
-    const notSuperP = document.createElement("p", "super-p");
-    assert_true(notSuperP instanceof HTMLParagraphElement);
-    assert_false(notSuperP instanceof SuperP);
-    assert_equals(notSuperP.localName, "p");
-}, "document.createElement()'s second argument is to be ignored when it's a string");
-
 function assert_reports(expected, testFunction, message) {
     var uncaughtError = null;
     window.onerror = function (message, url, lineNumber, columnNumber, error) { uncaughtError = error; return true; }
@@ -363,45 +327,6 @@
 
 }, 'document.createElement must report an exception thrown by a custom element constructor');
 
-test(function () {
-    var exceptionToThrow = {name: 'exception thrown by a custom constructor'};
-    class ThrowCustomBuiltinElement extends HTMLDivElement {
-        constructor()
-        {
-            super();
-            if (exceptionToThrow)
-                throw exceptionToThrow;
-        }
-    };
-    customElements.define('throw-custom-builtin-element', ThrowCustomBuiltinElement, { extends: 'div' });
-
-    assert_throws_exactly(exceptionToThrow, function () { new ThrowCustomBuiltinElement; });
-    var instance;
-    assert_reports(exceptionToThrow, function () { instance = document.createElement('div', { is: 'throw-custom-builtin-element' }); });
-    assert_equals(instance.localName, 'div');
-    assert_true(instance instanceof HTMLDivElement);
-
-    exceptionToThrow = false;
-    var instance = document.createElement('div', { is: 'throw-custom-builtin-element' });
-    assert_true(instance instanceof ThrowCustomBuiltinElement);
-    assert_equals(instance.localName, 'div');
-
-}, 'document.createElement must report an exception thrown by a custom built-in element constructor');
-
-test(() => {
-  class MyElement extends HTMLDivElement {}
-
-  // createElement with unknown 'is' should not throw.
-  // https://github.com/w3c/webcomponents/issues/608
-  let div = document.createElement('div', { is: 'my-div' });
-  assert_false(div instanceof MyElement);
-  assert_false(div.hasAttribute('is'));
-
-  customElements.define('my-div', MyElement, { extends: 'div' });
-  document.body.appendChild(div);
-  assert_true(div instanceof MyElement, 'Undefined element is upgraded on connecting to a document');
-}, 'document.createElement with unknown "is" value should create "undefined" state element');
-
 test(() => {
   class MyElement extends HTMLElement {
       constructor() {

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS-customized-builtins-expected.txt

@@ -0,0 +1,5 @@
+
+FAIL builtin: document.createElementNS should create custom elements with prefixes. assert_true: expected true got false
+PASS builtin: document.createElementNS should check namespaces.
+FAIL document.createElementNS()'s third argument is to be ignored when it's a string assert_true: expected true got false
+

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS-customized-builtins.html

@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<title>Custom Elements: document.createElementNS should support custom elements</title>
+<link rel="help" content="https://dom.spec.whatwg.org/#concept-create-element">
+<link rel="help" content="https://dom.spec.whatwg.org/#internal-createelementns-steps">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<script>
+test(() => {
+  class MyBuiltinElement extends HTMLElement {};
+
+  customElements.define('my-builtin', MyBuiltinElement, { extends: 'address' });
+  let element = document.createElementNS('http://www.w3.org/1999/xhtml', 'p:address', { is: 'my-builtin'});
+  assert_true(element instanceof MyBuiltinElement);
+  assert_equals(element.prefix, 'p');
+  assert_false(element.hasAttribute('is'));
+}, 'builtin: document.createElementNS should create custom elements with prefixes.');
+
+test(() => {
+  class MyBuiltinElement2 extends HTMLElement {};
+
+  customElements.define('my-builtin2', MyBuiltinElement2, { extends: 'address'});
+  let element = document.createElementNS('urn:example', 'address', { is: 'my-builtin2' });
+  assert_false(element instanceof MyBuiltinElement2);
+  assert_false(element.hasAttribute('is'));
+}, 'builtin: document.createElementNS should check namespaces.');
+
+test(() => {
+    class SuperP extends HTMLParagraphElement {}
+    customElements.define("super-p", SuperP, { extends: "p" });
+
+    const superP = document.createElementNS("http://www.w3.org/1999/xhtml", "p", { is: "super-p" });
+    assert_true(superP instanceof HTMLParagraphElement);
+    assert_true(superP instanceof SuperP);
+    assert_equals(superP.localName, "p");
+
+    const notSuperP = document.createElementNS("http://www.w3.org/1999/xhtml", "p", "super-p");
+    assert_true(notSuperP instanceof HTMLParagraphElement);
+    assert_false(notSuperP instanceof SuperP);
+    assert_equals(notSuperP.localName, "p");
+}, "document.createElementNS()'s third argument is to be ignored when it's a string");
+</script>
+</body>

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS-expected.txt

@@ -3,7 +3,4 @@ PASS autonomous: document.createElementNS should create custom elements with pre
 PASS autonomous: document.createElementNS should check namespaces.
 PASS autonomous: document.createElementNS should not create HTMLUnknownElement for a valid custom element name
 PASS autonomous: document.createElementNS with undefined options value should be upgraded.
-FAIL builtin: document.createElementNS should create custom elements with prefixes. assert_true: expected true got false
-PASS builtin: document.createElementNS should check namespaces.
-FAIL document.createElementNS()'s third argument is to be ignored when it's a string assert_true: expected true got false
 

LayoutTests/imported/w3c/web-platform-tests/custom-elements/Document-createElementNS.html

@@ -39,38 +39,5 @@
   assert_true(instance instanceof MyElement3);
 }, 'autonomous: document.createElementNS with undefined options value should be upgraded.');
 
-test(() => {
-  class MyBuiltinElement extends HTMLElement {};
-
-  customElements.define('my-builtin', MyBuiltinElement, { extends: 'address' });
-  let element = document.createElementNS('http://www.w3.org/1999/xhtml', 'p:address', { is: 'my-builtin'});
-  assert_true(element instanceof MyBuiltinElement);
-  assert_equals(element.prefix, 'p');
-  assert_false(element.hasAttribute('is'));
-}, 'builtin: document.createElementNS should create custom elements with prefixes.');
-
-test(() => {
-  class MyBuiltinElement2 extends HTMLElement {};
-
-  customElements.define('my-builtin2', MyBuiltinElement2, { extends: 'address'});
-  let element = document.createElementNS('urn:example', 'address', { is: 'my-builtin2' });
-  assert_false(element instanceof MyBuiltinElement2);
-  assert_false(element.hasAttribute('is'));
-}, 'builtin: document.createElementNS should check namespaces.');
-
-test(() => {
-    class SuperP extends HTMLParagraphElement {}
-    customElements.define("super-p", SuperP, { extends: "p" });
-
-    const superP = document.createElementNS("http://www.w3.org/1999/xhtml", "p", { is: "super-p" });
-    assert_true(superP instanceof HTMLParagraphElement);
-    assert_true(superP instanceof SuperP);
-    assert_equals(superP.localName, "p");
-
-    const notSuperP = document.createElementNS("http://www.w3.org/1999/xhtml", "p", "super-p");
-    assert_true(notSuperP instanceof HTMLParagraphElement);
-    assert_false(notSuperP instanceof SuperP);
-    assert_equals(notSuperP.localName, "p");
-}, "document.createElementNS()'s third argument is to be ignored when it's a string");
 </script>
 </body>

LayoutTests/imported/w3c/web-platform-tests/custom-elements/custom-element-registry/define-customized-builtins-expected.txt

@@ -0,0 +1,33 @@
+
+FAIL If extends is a-, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-valid-name', class {}, { extends: name });
+      }" did not throw
+PASS If extends is a-a, should throw a NotSupportedError
+PASS If extends is aa-, should throw a NotSupportedError
+PASS If extends is aa-a, should throw a NotSupportedError
+PASS If extends is a-.-_, should throw a NotSupportedError
+PASS If extends is a-0123456789, should throw a NotSupportedError
+PASS If extends is a-漢字, should throw a NotSupportedError
+PASS If extends is a-𠀋, should throw a NotSupportedError
+FAIL If extends is bgsound, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-' + name, class {}, { extends: name });
+      }" did not throw
+FAIL If extends is blink, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-' + name, class {}, { extends: name });
+      }" did not throw
+FAIL If extends is isindex, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-' + name, class {}, { extends: name });
+      }" did not throw
+FAIL If extends is multicol, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-' + name, class {}, { extends: name });
+      }" did not throw
+FAIL If extends is nextid, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-' + name, class {}, { extends: name });
+      }" did not throw
+FAIL If extends is spacer, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-' + name, class {}, { extends: name });
+      }" did not throw
+FAIL If extends is elementnametobeunknownelement, should throw a NotSupportedError assert_throws_dom: function "() =>  {
+        customElements.define('test-define-extend-' + name, class {}, { extends: name });
+      }" did not throw
+