Reland of Import wpt@357b83b809e3cbc7a1805e7c3ca108a7980d782f

third_party/WebKit/LayoutTests/imported/wpt/custom-elements/reactions/resources/reactions.js

 
 let testNumber = 1;
 
-function defineNewCustomElement(observedAttributes) {
-    let log = [];
-    let name = 'custom-element-' + testNumber++;
-
-    class CustomElement extends HTMLElement {
-        constructor() {
-            super();
-            log.push({type: 'constructed', element: this});
-        }
-        attributeChangedCallback(name, oldValue, newValue, namespace) {
-            log.push({type: 'attributeChanged', element: this, name: name, oldValue: oldValue, newValue: newValue, namespace: namespace});
-        }
-        connectedCallback() { log.push({type: 'connected', element: this}); }
-        disconnectedCallback() { log.push({type: 'disconnected', element: this}); }
-        adoptedCallback(oldDocument, newDocument) { log.push({type: 'adopted', element: this, oldDocument: oldDocument, newDocument: newDocument}); }
-    }
-    CustomElement.observedAttributes = observedAttributes || ['id', 'title'];
-
-    customElements.define(name, CustomElement);
-
-    return {
-        name: name,
-        log: function () {
-            let currentLog = log; log = [];
-            return {
-                types: () => currentLog.map((entry) => entry.type),
-                log: (i) => currentLog[i == undefined ? currentLog.length - 1 : i],
-            }
-        }
-    };
-}
-
 function testNodeConnector(testFunction, name) {
     let container = document.createElement('div');
     container.appendChild(document.createElement('div'));
     document.body.appendChild(container);
- 
+
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element();
         var instance = document.createElement(element.name);
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(container, instance);
-        assert_array_equals(element.log().types(), ['connected']);
+        assert_array_equals(element.takeLog().types(), ['connected']);
     }, name + ' must enqueue a connected reaction');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element();
         var instance = document.createElement(element.name);
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         var newDoc = document.implementation.createHTMLDocument();
         testFunction(container, instance);
-        assert_array_equals(element.log().types(), ['connected']);
+        assert_array_equals(element.takeLog().types(), ['connected']);
         testFunction(newDoc.documentElement, instance);
-        assert_array_equals(element.log().types(), ['disconnected', 'adopted', 'connected']);
+        assert_array_equals(element.takeLog().types(), ['disconnected', 'adopted', 'connected']);
     }, name + ' must enqueue a disconnected reaction, an adopted reaction, and a connected reaction when the custom element was in another document');
 
     container.parentNode.removeChild(container);
 }
 
 function testNodeDisconnector(testFunction, name) {
     let container = document.createElement('div');
     container.appendChild(document.createElement('div'));
     document.body.appendChild(container);
  
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element();
         var instance = document.createElement(element.name);
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         container.appendChild(instance);
-        assert_array_equals(element.log().types(), ['connected']);
+        assert_array_equals(element.takeLog().types(), ['connected']);
         testFunction(instance);
-        assert_array_equals(element.log().types(), ['disconnected']);
+        assert_array_equals(element.takeLog().types(), ['disconnected']);
     }, name + ' must enqueue a disconnected reaction');
 
     container.parentNode.removeChild(container);
 }
 
+function testCloner(testFunction, name) {
+    let container = document.createElement('div');
+    container.appendChild(document.createElement('div'));
+    document.body.appendChild(container);
+
+    test(function () {
+        var element = define_new_custom_element(['id']);
+        var instance = document.createElement(element.name);
+        container.appendChild(instance);
+
+        instance.setAttribute('id', 'foo');
+        assert_array_equals(element.takeLog().types(), ['constructed', 'connected', 'attributeChanged']);
+        var newInstance = testFunction(instance);
+        var logEntries = element.takeLog();
+        assert_array_equals(logEntries.types(), ['constructed', 'attributeChanged']);
+        assert_attribute_log_entry(logEntries.last(), {name: 'id', oldValue: null, newValue: 'foo', namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when cloning an element with an observed attribute');
+
+    test(function () {
+        var element = define_new_custom_element(['id']);
+        var instance = document.createElement(element.name);
+        container.appendChild(instance);
+
+        instance.setAttribute('lang', 'en');
+        assert_array_equals(element.takeLog().types(), ['constructed', 'connected']);
+        var newInstance = testFunction(instance);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
+    }, name + ' must not enqueue an attributeChanged reaction when cloning an element with an unobserved attribute');
+
+    test(function () {
+        var element = define_new_custom_element(['title', 'class']);
+        var instance = document.createElement(element.name);
+        container.appendChild(instance);
+
+        instance.setAttribute('lang', 'en');
+        instance.className = 'foo';
+        instance.setAttribute('title', 'hello world');
+        assert_array_equals(element.takeLog().types(), ['constructed', 'connected', 'attributeChanged', 'attributeChanged']);
+        var newInstance = testFunction(instance);
+        var logEntries = element.takeLog();
+        assert_array_equals(logEntries.types(), ['constructed', 'attributeChanged', 'attributeChanged']);
+        assert_attribute_log_entry(logEntries[1], {name: 'class', oldValue: null, newValue: 'foo', namespace: null});
+        assert_attribute_log_entry(logEntries[2], {name: 'title', oldValue: null, newValue: 'hello world', namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when cloning an element only for observed attributes');
+}
+
 function testReflectAttribute(jsAttributeName, contentAttributeName, validValue1, validValue2, name) {
     test(function () {
-        var element = defineNewCustomElement([contentAttributeName]);
+        var element = define_new_custom_element([contentAttributeName]);
         var instance = document.createElement(element.name);
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         instance[jsAttributeName] = validValue1;
-        var logEntries = element.log();
+        var logEntries = element.takeLog();
         assert_array_equals(logEntries.types(), ['attributeChanged']);
-        assert_equals(logEntries.log().name, contentAttributeName);
-        assert_equals(logEntries.log().oldValue, null);
-        assert_equals(logEntries.log().newValue, validValue1);
-        assert_equals(logEntries.log().namespace, null);
-    }, name + ' must enqueue a attributeChanged reaction when adding ' + contentAttributeName + ' content attribute');
+        assert_attribute_log_entry(logEntries.last(), {name: contentAttributeName, oldValue: null, newValue: validValue1, namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when adding ' + contentAttributeName + ' content attribute');
 
     test(function () {
-        var element = defineNewCustomElement([contentAttributeName]);
+        var element = define_new_custom_element([contentAttributeName]);
         var instance = document.createElement(element.name);
         instance[jsAttributeName] = validValue1;
-        assert_array_equals(element.log().types(), ['constructed', 'attributeChanged']);
+        assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
         instance[jsAttributeName] = validValue2;
-        var logEntries = element.log();
+        var logEntries = element.takeLog();
         assert_array_equals(logEntries.types(), ['attributeChanged']);
-        assert_equals(logEntries.log().name, contentAttributeName);
-        assert_equals(logEntries.log().oldValue, validValue1);
-        assert_equals(logEntries.log().newValue, validValue2);
-        assert_equals(logEntries.log().namespace, null);
-    }, name + ' must enqueue a attributeChanged reaction when replacing an existing attribute');
+        assert_attribute_log_entry(logEntries.last(), {name: contentAttributeName, oldValue: validValue1, newValue: validValue2, namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when replacing an existing attribute');
 }
 
 function testAttributeAdder(testFunction, name) {
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element(['id']);
         var instance = document.createElement(element.name);
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(instance, 'id', 'foo');
-        var logEntries = element.log();
+        var logEntries = element.takeLog();
         assert_array_equals(logEntries.types(), ['attributeChanged']);
-        assert_equals(logEntries.log().name, 'id');
-        assert_equals(logEntries.log().oldValue, null);
-        assert_equals(logEntries.log().newValue, 'foo');
-        assert_equals(logEntries.log().namespace, null);
-    }, name + ' must enqueue a attributeChanged reaction when adding an attribute');
+        assert_attribute_log_entry(logEntries.last(), {name: 'id', oldValue: null, newValue: 'foo', namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when adding an attribute');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element(['class']);
         var instance = document.createElement(element.name);
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(instance, 'data-lang', 'en');
-        assert_array_equals(element.log().types(), []);
-    }, name + ' must not enqueue a attributeChanged reaction when adding an unobserved attribute');
+        assert_array_equals(element.takeLog().types(), []);
+    }, name + ' must not enqueue an attributeChanged reaction when adding an unobserved attribute');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element(['title']);
         var instance = document.createElement(element.name);
         instance.setAttribute('title', 'hello');
-        assert_array_equals(element.log().types(), ['constructed', 'attributeChanged']);
+        assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
         testFunction(instance, 'title', 'world');
-        var logEntries = element.log();
+        var logEntries = element.takeLog();
         assert_array_equals(logEntries.types(), ['attributeChanged']);
-        assert_equals(logEntries.log().name, 'title');
-        assert_equals(logEntries.log().oldValue, 'hello');
-        assert_equals(logEntries.log().newValue, 'world');
-        assert_equals(logEntries.log().namespace, null);
-    }, name + ' must enqueue a attributeChanged reaction when replacing an existing attribute');
+        assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: 'hello', newValue: 'world', namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when replacing an existing attribute');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element([]);
         var instance = document.createElement(element.name);
         instance.setAttribute('data-lang', 'zh');
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(instance, 'data-lang', 'en');
-        assert_array_equals(element.log().types(), []);
-    }, name + ' must enqueue a attributeChanged reaction when replacing an existing unobserved attribute');
+        assert_array_equals(element.takeLog().types(), []);
+    }, name + ' must enqueue an attributeChanged reaction when replacing an existing unobserved attribute');
 }
 
 function testAttributeMutator(testFunction, name) {
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element(['title']);
         var instance = document.createElement(element.name);
         instance.setAttribute('title', 'hello');
-        assert_array_equals(element.log().types(), ['constructed', 'attributeChanged']);
+        assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
         testFunction(instance, 'title', 'world');
-        var logEntries = element.log();
+        var logEntries = element.takeLog();
         assert_array_equals(logEntries.types(), ['attributeChanged']);
-        assert_equals(logEntries.log().name, 'title');
-        assert_equals(logEntries.log().oldValue, 'hello');
-        assert_equals(logEntries.log().newValue, 'world');
-        assert_equals(logEntries.log().namespace, null);
-    }, name + ' must enqueue a attributeChanged reaction when replacing an existing attribute');
+        assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: 'hello', newValue: 'world', namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when replacing an existing attribute');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element(['class']);
         var instance = document.createElement(element.name);
         instance.setAttribute('data-lang', 'zh');
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(instance, 'data-lang', 'en');
-        assert_array_equals(element.log().types(), []);
-    }, name + ' must enqueue a attributeChanged reaction when replacing an existing unobserved attribute');
+        assert_array_equals(element.takeLog().types(), []);
+    }, name + ' must not enqueue an attributeChanged reaction when replacing an existing unobserved attribute');
 }
 
 function testAttributeRemover(testFunction, name) {
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element(['title']);
         var instance = document.createElement(element.name);
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(instance, 'title');
-        assert_array_equals(element.log().types(), []);
-    }, name + ' must not enqueue a attributeChanged reaction when removing an attribute that does not exist');
+        assert_array_equals(element.takeLog().types(), []);
+    }, name + ' must not enqueue an attributeChanged reaction when removing an attribute that does not exist');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element([]);
         var instance = document.createElement(element.name);
         instance.setAttribute('data-lang', 'hello');
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(instance, 'data-lang');
-        assert_array_equals(element.log().types(), []);
-    }, name + ' must not enqueue a attributeChanged reaction when removing an unobserved attribute that does not exist');
+        assert_array_equals(element.takeLog().types(), []);
+    }, name + ' must not enqueue an attributeChanged reaction when removing an unobserved attribute');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element(['title']);
         var instance = document.createElement(element.name);
         instance.setAttribute('title', 'hello');
-        assert_array_equals(element.log().types(), ['constructed', 'attributeChanged']);
+        assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
         testFunction(instance, 'title');
-        var logEntries = element.log();
+        var logEntries = element.takeLog();
         assert_array_equals(logEntries.types(), ['attributeChanged']);
-        assert_equals(logEntries.log().name, 'title');
-        assert_equals(logEntries.log().oldValue, 'hello');
-        assert_equals(logEntries.log().newValue, null);
-        assert_equals(logEntries.log().namespace, null);
-    }, name + ' must enqueue a attributeChanged reaction when removing an existing attribute');
+        assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: 'hello', newValue: null, namespace: null});
+    }, name + ' must enqueue an attributeChanged reaction when removing an existing attribute');
 
     test(function () {
-        var element = defineNewCustomElement();
+        var element = define_new_custom_element([]);
         var instance = document.createElement(element.name);
         instance.setAttribute('data-lang', 'ja');
-        assert_array_equals(element.log().types(), ['constructed']);
+        assert_array_equals(element.takeLog().types(), ['constructed']);
         testFunction(instance, 'data-lang');
-        assert_array_equals(element.log().types(), []);
-    }, name + ' must not enqueue a attributeChanged reaction when removing an existing unobserved attribute');
+        assert_array_equals(element.takeLog().types(), []);
+    }, name + ' must not enqueue an attributeChanged reaction when removing an existing unobserved attribute');
 }