Test steps 4 and 5 of the HTMLConstructor

2 files changed, 13 insertions, 1 deletions

diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index a235abdc2e5..02bcc380548 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -554120,7 +554120,7 @@
    "testharness"
   ],
   "custom-elements/HTMLElement-constructor.html": [
-   "7fefdaa4cbdf30c505858730a5a3858e9db5dbc2",
+   "64522527ef425b90c704b20b000c8feef0d1ca25",
    "testharness"
   ],
   "custom-elements/OWNERS": [
diff --git a/tests/wpt/web-platform-tests/custom-elements/HTMLElement-constructor.html b/tests/wpt/web-platform-tests/custom-elements/HTMLElement-constructor.html
index 1ed625f63bb..cb6d5409962 100644
--- a/tests/wpt/web-platform-tests/custom-elements/HTMLElement-constructor.html
+++ b/tests/wpt/web-platform-tests/custom-elements/HTMLElement-constructor.html
@@ -28,6 +28,18 @@ test(function () {
 }, 'HTMLElement constructor must throw TypeError when it has not been defined by customElements.define');
 
 test(function () {
+    class SomeCustomElement extends HTMLParagraphElement {};
+    customElements.define('some-custom-element', SomeCustomElement);
+    assert_throws({'name': 'TypeError'}, function () { new SomeCustomElement(); });
+}, 'Custom element constructor must throw TypeError when it does not extend HTMLElement');
+
+test(function () {
+    class SomeCustomButtonElement extends HTMLButtonElement {};
+    customElements.define('some-custom-button-element', SomeCustomButtonElement, { extends: "p" });
+    assert_throws({'name': 'TypeError'}, function () { new SomeCustomButtonElement(); });
+}, 'Custom element constructor must throw TypeError when it does not extend the proper element interface');
+
+test(function () {
     class CustomElementWithInferredTagName extends HTMLElement {};
     customElements.define('inferred-name', CustomElementWithInferredTagName);