Bug 1834803 [wpt PR 40198] - Make popover optional in custom elements reactions test, a=testonly

Automatic update from web-platform-tests
Make popover optional in custom elements reactions test

See https://github.com/web-platform-tests/wpt/pull/38889#issuecomment-1534764545
--

wpt-commits: 0d9a5c55a3375d70eeef666accea65ea37ccc1e8
wpt-pr: 40198

testing/web-platform/tests/custom-elements/reactions/HTMLElement.html

@@ -23,7 +23,7 @@ testReflectAttribute('tabIndex', 'tabindex', '0', '1', 'tabIndex on HTMLElement'
 testReflectAttribute('accessKey', 'accesskey', 'a', 'b', 'accessKey on HTMLElement');
 testReflectAttributeWithContentValues('draggable', 'draggable', true, 'true', false, 'false', 'draggable on HTMLElement');
 testReflectAttributeWithContentValues('spellcheck', 'spellcheck', true, 'true', false, 'false', 'spellcheck on HTMLElement');
-testReflectAttribute('popover', 'popover', 'auto', 'manual', 'popover on HTMLElement');
+testReflectAttribute('popover', 'popover', 'auto', 'manual', 'popover on HTMLElement', undefined, undefined, () => 'popover' in HTMLElement.prototype);
 
 testNodeDisconnector(function (customElement) {
     customElement.parentNode.innerText = '';

testing/web-platform/tests/custom-elements/reactions/resources/reactions.js

@@ -126,8 +126,11 @@ function testCloner(testFunction, name) {
     }, name + ' must enqueue an attributeChanged reaction when cloning an element only for observed attributes');
 }
 
-function testReflectAttributeWithContentValues(jsAttributeName, contentAttributeName, validValue1, contentValue1, validValue2, contentValue2, name, elementName, interfaceName) {
+function testReflectAttributeWithContentValues(jsAttributeName, contentAttributeName, validValue1, contentValue1, validValue2, contentValue2, name, elementName, interfaceName, optionalSupportPredicate) {
     test(function () {
+        if (optionalSupportPredicate) {
+            assert_implements_optional(optionalSupportPredicate());
+        }
         if (elementName === undefined) {
             var element = define_new_custom_element([contentAttributeName]);
             var instance = document.createElement(element.name);
@@ -144,6 +147,9 @@ function testReflectAttributeWithContentValues(jsAttributeName, contentAttribute
     }, name + ' must enqueue an attributeChanged reaction when adding ' + contentAttributeName + ' content attribute');
 
     test(function () {
+        if (optionalSupportPredicate) {
+            assert_implements_optional(optionalSupportPredicate());
+        }
         if (elementName === undefined) {
             var element = define_new_custom_element([contentAttributeName]);
             var instance = document.createElement(element.name);
@@ -160,8 +166,8 @@ function testReflectAttributeWithContentValues(jsAttributeName, contentAttribute
     }, name + ' must enqueue an attributeChanged reaction when replacing an existing attribute');
 }
 
-function testReflectAttribute(jsAttributeName, contentAttributeName, validValue1, validValue2, name, elementName, interfaceName) {
-    testReflectAttributeWithContentValues(jsAttributeName, contentAttributeName, validValue1, validValue1, validValue2, validValue2, name, elementName, interfaceName);
+function testReflectAttribute(jsAttributeName, contentAttributeName, validValue1, validValue2, name, elementName, interfaceName, optionalSupportPredicate) {
+    testReflectAttributeWithContentValues(jsAttributeName, contentAttributeName, validValue1, validValue1, validValue2, validValue2, name, elementName, interfaceName, optionalSupportPredicate);
 }
 
 function testReflectBooleanAttribute(jsAttributeName, contentAttributeName, name, elementName, interfaceName) {