third_party/WebKit/LayoutTests/imported/wpt/custom-elements/parser/parser-uses-constructed-element.html - Issue 2434563008: Import wpt@26c8d4e87448d1c4e5ebf2ddb4917c0633c201db

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Issue 2434563008: Import wpt@26c8d4e87448d1c4e5ebf2ddb4917c0633c201db (Closed)

Patch Set: Mark one more test as potentially timing out Created 4 years, 1 month ago

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	1 <!DOCTYPE html>

	2 <html>

	3 <head>

	4 <title>Custom Elements: HTML parser must construct a custom element instead of u pgrading</title>

	5 <meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">

	6 <meta name="assert" content="HTML parser must construct a custom element instead of upgrading">

	7 <script src="/resources/testharness.js"></script>

	8 <script src="/resources/testharnessreport.js"></script>

	9 <link rel="help" href="https://html.spec.whatwg.org/#create-an-element-for-the-t oken">

	10 <link rel="help" href="https://dom.spec.whatwg.org/#concept-create-element">

	11 </head>

	12 <body>

	13 <div id="log"></div>

	14 <script>

	15

	16 let anotherElementCreatedBeforeSuperCall = undefined;

	17 let elementCreatedBySuperCall = undefined;

	18 let shouldCreateElementBeforeSuperCall = true;

	19 class InstantiatesItselfBeforeSuper extends HTMLElement {

	20 constructor() {

	21 if (shouldCreateElementBeforeSuperCall) {

	22 shouldCreateElementBeforeSuperCall = false;

	23 anotherElementCreatedBeforeSuperCall = new InstantiatesItselfBeforeS uper();

	24 }

	25 super();

	26 elementCreatedBySuperCall = this;

	27 }

	28 };

	29 customElements.define('instantiates-itself-before-super', InstantiatesItselfBefo reSuper);

	30

	31 let shouldCreateAnotherInstance = true;

	32 let anotherInstance = undefined;

	33 let firstInstance = undefined;

	34 class ReturnsAnotherInstance extends HTMLElement {

	35 constructor() {

	36 super();

	37 if (shouldCreateAnotherInstance) {

	38 shouldCreateAnotherInstance = false;

	39 firstInstance = this;

	40 anotherInstance = new ReturnsAnotherInstance;

	41 return anotherInstance;

	42 } else

	43 return this;

	44 }

	45 };

	46 customElements.define('returns-another-instance', ReturnsAnotherInstance);

	47

	48 </script>

	49 <instantiates-itself-before-super></instantiates-itself-before-super>

	50 <returns-another-instance></returns-another-instance>

	51 <script>

	52

	53 test(function () {

	54 var instance = document.querySelector('instantiates-itself-before-super');

	55

	56 assert_equals(instance instanceof InstantiatesItselfBeforeSuper, 'HTML parse r must insert the synchronously constructed custom element');

	57 assert_equals(instance, elementCreatedBySuperCall, 'HTML parser must insert the element returned by the custom element constructor');

	58 assert_not_equals(instance, anotherElementCreatedBeforeSuperCall, 'HTML pars er must not insert another instance of the custom element created before super() call');

	59 assert_equals(anotherElementCreatedBeforeSuperCall.parentNode, null, 'HTML p arser must not insert another instance of the custom element created before supe r() call');

	60

	61 }, 'HTML parser must use the returned value of the custom element constructor in stead of the one created before super() call');

	62

	63 test(function () {

	64 var instance = document.querySelector('returns-another-instance');

	65

	66 assert_equals(instance instanceof ReturnsAnotherInstance, 'HTML parser must insert the synchronously constructed custom element');

	67 assert_equals(instance, anotherInstance, 'HTML parser must insert the elemen t returned by the custom element constructor');

	68 assert_not_equals(instance, firstInstance, 'HTML parser must not insert the element created by super() call if the constructor returned another element');

	69 assert_equals(firstInstance.parentNode, null, 'HTML parser must not insert t he element created by super() call if the constructor returned another element') ;

	70

	71 }, 'HTML parser must use the returned value of the custom element constructor in stead using the one created in super() call');

	72

	73 </script>

	74 </body>

	75 </html>

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