From 386db1904b16bc81685f05bad61abcdd78ee1ed5 Mon Sep 17 00:00:00 2001
From: "TAMURA, Kent" <tkent@chromium.org>
Date: Thu, 13 Jun 2019 10:34:14 +0000
Subject: [PATCH] Bug 1552241 [wpt PR 16795] - shadow-dom: Add testcases for
 attachShadow() with disabledFeatures=['shadow'], a=testonly

Automatic update from web-platform-tests
Test attachShadow() with disabledFeatures=['shadow']

Follows https://github.com/whatwg/dom/pull/760.
--

wp5At-commits: 7e939f6d8eac12d0830d8a47eb72e38097b12f9e
wpt-pr: 16795
---
 ...interface-attachShadow-custom-element.html | 72 +++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/testing/web-platform/tests/shadow-dom/Element-interface-attachShadow-custom-element.html b/testing/web-platform/tests/shadow-dom/Element-interface-attachShadow-custom-element.html
index b59460e17b973..5d862c49244b4 100644
--- a/testing/web-platform/tests/shadow-dom/Element-interface-attachShadow-custom-element.html
+++ b/testing/web-platform/tests/shadow-dom/Element-interface-attachShadow-custom-element.html
@@ -14,6 +14,78 @@
   assert_true(document.createElement('my-custom').attachShadow({mode: "open"}) instanceof ShadowRoot);
 }, 'Element.attachShadow must create an instance of ShadowRoot for autonomous custom elements');
 
+test(() => {
+  assert_true(document.createElement('undefined-custom').attachShadow({mode: 'open'}) instanceof ShadowRoot);
+}, 'Element.attachShadow must create an instance of ShadowRoot for undefined autonomous custom elements');
+
+test(() => {
+  class ShadowDisabledElement extends HTMLElement {
+    static disabledFeatures = ['shadow'];
+  }
+
+  // No definition. attachShadow() should succeed.
+  let element = document.createElement('shadow-disabled-element');
+  element.attachShadow({mode: 'closed'});
+
+  // No definition and it's already a host.
+  assert_throws('NotSupportedError', () => {
+    element.attachShadow({mode: 'closed'});
+  }, 'No definition, host');
+
+  // The element has a definition, and it's already a host.
+  customElements.define('shadow-disabled-element', ShadowDisabledElement);
+  assert_throws('NotSupportedError', () => {
+    element.attachShadow({mode: 'closed'});
+  }, 'Definition, host');
+
+  // The element has a definition, and it's not a host.
+  assert_throws('NotSupportedError', () => {
+    document.createElement('shadow-disabled-element').attachShadow({mode: 'closed'});
+  }, 'Definition, not a host');
+}, 'Element.attachShadow for an autonomous custom element with ' +
+   'disabledFeatures=["shadow"] should throw a NotSupportedError');
+
+test(() => {
+  class ShadowDisabledHeadingElement extends HTMLHeadingElement {
+    static disabledFeatures = ['shadow'];
+  }
+
+  // No definition. attachShadow() should succeed.
+  let element = document.createElement('h2',
+      {is: 'shadow-disabled-heading-element'});
+  element.attachShadow({mode: 'closed'});
+
+  // No definition and it's already a host.
+  assert_throws('NotSupportedError', () => {
+    element.attachShadow({mode: 'closed'});
+  }, 'No definition, host.');
+
+  // The element has a definition, and it's already a host.
+  customElements.define('shadow-disabled-heading-element',
+      ShadowDisabledHeadingElement, {extends: 'h2'});
+  assert_throws('NotSupportedError', () => {
+    element.attachShadow({mode: 'closed'});
+  }, 'Definition, host');
+
+  // The element has a definition, and it's not a host.
+  let h2 = document.createElement('h2', {is: 'shadow-disabled-heading-element'});
+  assert_throws('NotSupportedError', () => {
+    h2.attachShadow({mode: 'closed'});
+  }, 'Definition, not a host');
+}, 'Element.attachShadow for a customized built-in element with ' +
+   'disabledFeatures=["shadow"] should throw a NotSupportedError');
+
+test(() => {
+  class CapitalShadowDisabledElement extends HTMLElement {
+    static disabledFeatures = ['SHADOW'];
+  }
+
+  customElements.define('capital-shadow-disabled-element', CapitalShadowDisabledElement);
+
+  // Test fails if this throws
+  document.createElement('capital-shadow-disabled-element').attachShadow({mode: 'open'});
+}, 'Element.attachShadow for a custom element with disabledFeatures=["SHADOW"] should not throw a NotSupportedError');
+
 class MyCustomizedBuiltinElement extends HTMLInputElement {
 }