HTML: test upgrade custom element failure due to disabledFeatures

Specification PR: whatwg/html#4673.
web-platform-tests · Jun 11, 2019 · a3dcc65 · a3dcc65
1 parent 3436929
commit a3dcc65
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/custom-elements/upgrading.html b/custom-elements/upgrading.html
@@ -14,6 +14,7 @@
 <body>
 <div id="log"></div>
 <script>
+setup({allow_uncaught_exception:true});
 
 class PredefinedCustomElement extends HTMLElement {}
 customElements.define('predefined-custom-element', PredefinedCustomElement);
@@ -185,6 +186,23 @@
 
 });
 
+test(() => {
+    class ShadowDisabledElement extends HTMLElement {
+      static get disabledFeatures() { return ['shadow']; }
+    }
+    let error = null;
+    window.addEventListener('error', e => { error = e.error; }, {once: true});
+    let element = document.createElement('shadow-disabled');
+    element.attachShadow({mode: 'open'});
+    customElements.define('shadow-disabled', ShadowDisabledElement);
+    customElements.upgrade(element);
+    assert_false(element instanceof ShadowDisabledElement,
+                 'Upgrading should fail.');
+    assert_true(error instanceof DOMException);
+    assert_equals(error.name, 'NotSupportedError');
+}, 'If definition\'s disable shadow is true and element\'s shadow root is ' +
+    'non-null, then throw a "NotSupportedError" DOMException.');
+
 </script>
 </body>
 </html>