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Element.test.ts
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Element.test.ts
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import Window from '../../../src/window/Window';
import IWindow from '../../../src/window/IWindow';
import XMLSerializer from '../../../src/xml-serializer/XMLSerializer';
import XMLParser from '../../../src/xml-parser/XMLParser';
import CustomElement from '../../CustomElement';
import ShadowRoot from '../../../src/nodes/shadow-root/ShadowRoot';
import IDocument from '../../../src/nodes/document/IDocument';
import Text from '../../../src/nodes/text/Text';
import DOMRect from '../../../src/nodes/element/DOMRect';
import NamespaceURI from '../../../src/config/NamespaceURI';
import ParentNodeUtility from '../../../src/nodes/parent-node/ParentNodeUtility';
import QuerySelector from '../../../src/query-selector/QuerySelector';
import ChildNodeUtility from '../../../src/nodes/child-node/ChildNodeUtility';
import NonDocumentChildNodeUtility from '../../../src/nodes/child-node/NonDocumentChildNodeUtility';
import HTMLTemplateElement from '../../../src/nodes/html-template-element/HTMLTemplateElement';
import Node from '../../../src/nodes/node/Node';
import IHTMLCollection from '../../../src/nodes/element/IHTMLCollection';
import IElement from '../../../src/nodes/element/IElement';
import INodeList from '../../../src/nodes/node/INodeList';
import IAttr from '../../../src/nodes/attr/IAttr';
const NAMESPACE_URI = 'https://test.test';
describe('Element', () => {
let window: IWindow;
let document: IDocument;
let element: IElement;
beforeEach(() => {
window = new Window();
document = window.document;
element = <IElement>document.createElement('div');
window.customElements.define('custom-element', CustomElement);
});
afterEach(() => {
jest.restoreAllMocks();
});
describe('children', () => {
it('Returns nodes of type Element.', () => {
const div1 = document.createElement('div');
const div2 = document.createElement('div');
const textNode = document.createTextNode('text');
element.appendChild(div1);
element.appendChild(textNode);
element.appendChild(div2);
expect(element.children.length).toBe(2);
expect(element.children[0] === div1).toBe(true);
expect(element.children[1] === div2).toBe(true);
});
});
describe('get id()', () => {
it('Returns the element "id" attribute.', () => {
element.setAttribute('id', 'id');
expect(element.id).toBe('id');
});
});
describe('set id()', () => {
it('Sets the element "id" as an attribute.', () => {
element.id = 'id';
expect(element.getAttribute('id')).toBe('id');
});
});
describe('get slot()', () => {
it('Returns the element "slot" attribute.', () => {
element.setAttribute('slot', 'slot');
expect(element.slot).toBe('slot');
});
});
describe('set slot()', () => {
it('Sets the element "slot" as an attribute.', () => {
element.slot = 'slot';
expect(element.getAttribute('slot')).toBe('slot');
});
});
describe('get className()', () => {
it('Returns the element "class" attribute.', () => {
element.setAttribute('class', 'class');
expect(element.className).toBe('class');
});
});
describe('get classList()', () => {
it('Returns a DOMTokenList object.', () => {
element.setAttribute('class', 'class1');
expect(element.classList.value).toBe('class1');
});
});
describe('set id()', () => {
it('Sets the element "class" as an attribute.', () => {
element.className = 'class';
expect(element.getAttribute('class')).toBe('class');
});
});
describe('get namespaceURI()', () => {
it('Returns the "namespaceURI" property of the element.', () => {
expect(element.namespaceURI).toEqual(NamespaceURI.html);
});
});
describe('get nodeName()', () => {
it('Returns the "tagName" property of the element.', () => {
expect(element.nodeName).toEqual('DIV');
});
});
describe('get localName()', () => {
it('Returns the "tagName" property of the element in lower case.', () => {
expect(element.localName).toEqual('div');
});
});
describe('get textContent()', () => {
it('Returns text node data of children as a concatenated string.', () => {
const div = document.createElement('div');
const textNode1 = document.createTextNode('text1');
const textNode2 = document.createTextNode('text2');
element.appendChild(div);
element.appendChild(textNode2);
div.appendChild(textNode1);
expect(element.textContent).toBe('text1text2');
});
});
describe('set textContent()', () => {
it('Replaces child nodes with a text node.', () => {
const div = document.createElement('div');
const textNode1 = document.createTextNode('text1');
const textNode2 = document.createTextNode('text2');
element.appendChild(div);
element.appendChild(textNode1);
element.appendChild(textNode2);
element.textContent = 'new_text';
expect(element.textContent).toBe('new_text');
expect(element.childNodes.length).toBe(1);
expect((<Text>element.childNodes[0]).textContent).toBe('new_text');
});
it('Removes all child nodes if textContent is set to empty string.', () => {
const div = document.createElement('div');
const textNode1 = document.createTextNode('text1');
const textNode2 = document.createTextNode('text2');
element.appendChild(div);
element.appendChild(textNode1);
element.appendChild(textNode2);
element.textContent = '';
expect(element.childNodes.length).toBe(0);
});
});
describe('get innerHTML()', () => {
it('Returns HTML of children as a concatenated string.', () => {
const div = document.createElement('div');
element.appendChild(div);
jest.spyOn(XMLSerializer.prototype, 'serializeToString').mockImplementation((rootElement) => {
expect(rootElement).toBe(div);
return 'EXPECTED_HTML';
});
expect(element.innerHTML).toBe('EXPECTED_HTML');
});
});
describe('set innerHTML()', () => {
it('Creates child nodes from provided HTML.', () => {
const root = document.createDocumentFragment();
const div = document.createElement('div');
const textNode = document.createTextNode('text1');
element.appendChild(document.createElement('div'));
div.appendChild(textNode);
root.appendChild(div);
jest.spyOn(XMLParser, 'parse').mockImplementation((parseDocument, html) => {
expect(parseDocument).toBe(document);
expect(html).toBe('SOME_HTML');
return root;
});
element.innerHTML = 'SOME_HTML';
expect(element.innerHTML).toBe('<div>text1</div>');
});
});
describe('get innerHTML()', () => {
it('Returns HTML of an elements children as a concatenated string.', () => {
const div = document.createElement('div');
const textNode1 = document.createTextNode('text1');
element.appendChild(div);
element.appendChild(textNode1);
expect(element.outerHTML).toBe('<div><div></div>text1</div>');
});
});
describe('get outerHTML()', () => {
it('Returns HTML of an element and its children as a concatenated string.', () => {
const div = document.createElement('div');
const textNode = document.createTextNode('text1');
div.appendChild(textNode);
element.appendChild(div);
expect(element.innerHTML).toBe('<div>text1</div>');
});
});
describe('set outerHTML()', () => {
it('Sets outer HTML of an element.', () => {
const div = document.createElement('div');
const textNode = document.createTextNode('text1');
div.appendChild(textNode);
element.appendChild(div);
div.outerHTML = '<span>text2</span>';
expect(element.innerHTML).toBe('<span>text2</span>');
});
});
describe('get attributes()', () => {
it('Returns all attributes as an object.', () => {
element.setAttribute('key1', 'value1');
element.setAttribute('key2', 'value2');
element.setAttribute('key3', 'value3');
expect(element.attributes.length).toBe(3);
expect(element.attributes[0].name).toBe('key1');
expect(element.attributes[0].value).toBe('value1');
expect(element.attributes[0].namespaceURI).toBe(null);
expect(element.attributes[0].specified).toBe(true);
expect(element.attributes[0].ownerElement === element).toBe(true);
expect(element.attributes[0].ownerDocument === document).toBe(true);
expect(element.attributes[1].name).toBe('key2');
expect(element.attributes[1].value).toBe('value2');
expect(element.attributes[1].namespaceURI).toBe(null);
expect(element.attributes[1].specified).toBe(true);
expect(element.attributes[1].ownerElement === element).toBe(true);
expect(element.attributes[1].ownerDocument === document).toBe(true);
expect(element.attributes[2].name).toBe('key3');
expect(element.attributes[2].value).toBe('value3');
expect(element.attributes[2].namespaceURI).toBe(null);
expect(element.attributes[2].specified).toBe(true);
expect(element.attributes[2].ownerElement === element).toBe(true);
expect(element.attributes[2].ownerDocument === document).toBe(true);
expect(element.attributes.key1.name).toBe('key1');
expect(element.attributes.key1.value).toBe('value1');
expect(element.attributes.key1.namespaceURI).toBe(null);
expect(element.attributes.key1.specified).toBe(true);
expect(element.attributes.key1.ownerElement === element).toBe(true);
expect(element.attributes.key1.ownerDocument === document).toBe(true);
expect(element.attributes.key2.name).toBe('key2');
expect(element.attributes.key2.value).toBe('value2');
expect(element.attributes.key2.namespaceURI).toBe(null);
expect(element.attributes.key2.specified).toBe(true);
expect(element.attributes.key2.ownerElement === element).toBe(true);
expect(element.attributes.key2.ownerDocument === document).toBe(true);
expect(element.attributes.key3.name).toBe('key3');
expect(element.attributes.key3.value).toBe('value3');
expect(element.attributes.key3.namespaceURI).toBe(null);
expect(element.attributes.key3.specified).toBe(true);
expect(element.attributes.key3.ownerElement === element).toBe(true);
expect(element.attributes.key3.ownerDocument === document).toBe(true);
});
});
describe('get childElementCount()', () => {
it('Returns child element count.', () => {
document.appendChild(document.createElement('div'));
document.appendChild(document.createTextNode('test'));
expect(document.childElementCount).toEqual(2);
});
});
describe('get firstElementChild()', () => {
it('Returns first element child.', () => {
const div = document.createElement('div');
const span1 = document.createElement('span');
const span2 = document.createElement('span');
const text1 = document.createTextNode('text1');
const text2 = document.createTextNode('text2');
for (const node of document.childNodes.slice()) {
node.parentNode.removeChild(node);
}
div.appendChild(text1);
div.appendChild(span1);
div.appendChild(span2);
div.appendChild(text2);
expect(div.firstElementChild === span1).toBe(true);
});
});
describe('get lastElementChild()', () => {
it('Returns last element child.', () => {
const div = document.createElement('div');
const span1 = document.createElement('span');
const span2 = document.createElement('span');
const text1 = document.createTextNode('text1');
const text2 = document.createTextNode('text2');
for (const node of document.childNodes.slice()) {
node.parentNode.removeChild(node);
}
div.appendChild(text1);
div.appendChild(span1);
div.appendChild(span2);
div.appendChild(text2);
expect(div.lastElementChild === span2).toBe(true);
});
});
describe('getInnerHTML()', () => {
it('Returns HTML of children as a concatenated string.', () => {
const div = document.createElement('div');
element.appendChild(div);
jest.spyOn(XMLSerializer.prototype, 'serializeToString').mockImplementation((rootElement) => {
expect(rootElement === div).toBe(true);
return 'EXPECTED_HTML';
});
expect(element.getInnerHTML()).toBe('EXPECTED_HTML');
});
it('Returns HTML of children and shadow roots of custom elements as a concatenated string.', () => {
const div = document.createElement('div');
element.appendChild(div);
jest
.spyOn(XMLSerializer.prototype, 'serializeToString')
.mockImplementation((rootElement, options) => {
expect(rootElement === div).toBe(true);
expect(options).toEqual({ includeShadowRoots: true });
return 'EXPECTED_HTML';
});
expect(element.getInnerHTML({ includeShadowRoots: true })).toBe('EXPECTED_HTML');
});
});
describe('append()', () => {
it('Inserts a set of Node objects or DOMString objects after the last child of the ParentNode. DOMString objects are inserted as equivalent Text nodes.', () => {
const node1 = document.createComment('test1');
const node2 = document.createComment('test2');
let isCalled = false;
jest.spyOn(ParentNodeUtility, 'append').mockImplementation((parentNode, ...nodes) => {
expect(parentNode === document).toBe(true);
expect(nodes.length).toBe(2);
expect(nodes[0] === node1).toBe(true);
expect(nodes[1] === node2).toBe(true);
isCalled = true;
});
document.append(node1, node2);
expect(isCalled).toBe(true);
});
});
describe('prepend()', () => {
it('Inserts a set of Node objects or DOMString objects before the first child of the ParentNode. DOMString objects are inserted as equivalent Text nodes.', () => {
const node1 = document.createComment('test1');
const node2 = document.createComment('test2');
let isCalled = false;
jest.spyOn(ParentNodeUtility, 'prepend').mockImplementation((parentNode, ...nodes) => {
expect(parentNode === document).toBe(true);
expect(nodes.length).toBe(2);
expect(nodes[0] === node1).toBe(true);
expect(nodes[1] === node2).toBe(true);
isCalled = true;
});
document.prepend(node1, node2);
expect(isCalled).toBe(true);
});
});
describe('insertAdjacentElement()', () => {
it('Inserts a Node right before the reference element and returns with it.', () => {
const parent = document.createElement('div');
const newNode = document.createElement('span');
document.body.appendChild(parent);
const insertedNode = parent.insertAdjacentElement('beforebegin', newNode);
expect(insertedNode === newNode).toBe(true);
expect(parent.childNodes.length).toEqual(0);
expect(insertedNode.isConnected).toBe(true);
expect(document.body.childNodes[0] === newNode).toBe(true);
});
it('Returns with null if cannot insert with "beforebegin".', () => {
const parent = document.createElement('div');
const newNode = document.createElement('span');
const insertedNode = parent.insertAdjacentElement('beforebegin', newNode);
expect(insertedNode === null).toBe(true);
expect(newNode.isConnected).toBe(false);
});
it('Inserts a Node inside the reference element before the first child and returns with it.', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
const newNode = document.createElement('span');
parent.appendChild(child);
document.body.appendChild(parent);
const insertedNode = parent.insertAdjacentElement('afterbegin', newNode);
expect(insertedNode === newNode).toBe(true);
expect(parent.childNodes[0] === insertedNode).toBe(true);
expect(insertedNode.isConnected).toBe(true);
});
it('Inserts a Node inside the reference element after the last child and returns with it.', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
const newNode = document.createElement('span');
parent.appendChild(child);
document.body.appendChild(parent);
const insertedNode = parent.insertAdjacentElement('beforeend', newNode);
expect(insertedNode === newNode).toBe(true);
expect(parent.childNodes[1] === insertedNode).toBe(true);
expect(insertedNode.isConnected).toBe(true);
});
it('Inserts a Node right after the reference element and returns with it.', () => {
const parent = document.createElement('div');
const newNode = document.createElement('span');
document.body.appendChild(parent);
const insertedNode = parent.insertAdjacentElement('afterend', newNode);
expect(insertedNode === newNode).toBe(true);
expect(parent.childNodes.length).toEqual(0);
expect(insertedNode.isConnected).toBe(true);
expect(document.body.childNodes[0] === parent).toBe(true);
expect(document.body.childNodes[1] === insertedNode).toBe(true);
});
it('Inserts a Node right after the reference element and returns with it.', () => {
const parent = document.createElement('div');
const sibling = document.createElement('div');
const newNode = document.createElement('span');
document.body.appendChild(parent);
document.body.appendChild(sibling);
const insertedNode = parent.insertAdjacentElement('afterend', newNode);
expect(insertedNode === newNode).toBe(true);
expect(parent.childNodes.length).toBe(0);
expect(newNode.isConnected).toBe(true);
expect(document.body.childNodes[0] === parent).toBe(true);
expect(document.body.childNodes[1] === insertedNode).toBe(true);
expect(document.body.childNodes[2] === sibling).toBe(true);
});
it('Returns with null if cannot insert with "afterend".', () => {
const parent = document.createElement('div');
const newNode = document.createElement('span');
const insertedNode = parent.insertAdjacentElement('afterend', newNode);
expect(insertedNode).toBe(null);
expect(newNode.isConnected).toBe(false);
});
});
describe('insertAdjacentHTML()', () => {
it('Inserts the given HTML right before the reference element.', () => {
const parent = document.createElement('div');
const markup = '<span>markup</span>';
document.body.appendChild(parent);
parent.insertAdjacentHTML('beforebegin', markup);
expect(parent.childNodes.length).toBe(0);
expect((<IElement>document.body.childNodes[0]).outerHTML).toEqual(markup);
});
it('Inserts the given HTML inside the reference element before the first child.', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
const markup = '<span>markup</span>';
parent.appendChild(child);
document.body.appendChild(parent);
parent.insertAdjacentHTML('afterbegin', markup);
expect((<IElement>parent.childNodes[0]).outerHTML).toEqual(markup);
expect(parent.childNodes[1] === child).toBe(true);
});
it('Inserts the given HTML inside the reference element after the last child.', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
const markup = '<span>markup</span>';
parent.appendChild(child);
document.body.appendChild(parent);
parent.insertAdjacentHTML('beforeend', markup);
expect(parent.childNodes[0] === child).toBe(true);
expect((<IElement>parent.childNodes[1]).outerHTML).toEqual(markup);
});
it('Inserts the given HTML right after the reference element.', () => {
const parent = document.createElement('div');
const markup = '<span>markup</span>';
document.body.appendChild(parent);
parent.insertAdjacentHTML('afterend', markup);
expect(parent.childNodes.length).toEqual(0);
expect(document.body.childNodes[0] === parent).toBe(true);
expect((<IElement>document.body.childNodes[1]).outerHTML).toEqual(markup);
});
it('Inserts the given HTML right after the reference element if it has a sibling.', () => {
const parent = document.createElement('div');
const sibling = document.createElement('div');
const markup = '<span>markup</span>';
document.body.appendChild(parent);
document.body.appendChild(sibling);
parent.insertAdjacentHTML('afterend', markup);
expect(parent.childNodes.length).toBe(0);
expect(document.body.childNodes[0] === parent).toBe(true);
expect((<IElement>document.body.childNodes[1]).outerHTML).toEqual(markup);
expect(document.body.childNodes[2] === sibling).toBe(true);
});
});
describe('insertAdjacentText()', () => {
it('Inserts the given text right before the reference element.', () => {
const parent = document.createElement('div');
const text = 'lorem';
document.body.appendChild(parent);
parent.insertAdjacentText('beforebegin', text);
expect(parent.childNodes.length).toEqual(0);
expect(document.body.childNodes[0].nodeType).toBe(Node.TEXT_NODE);
expect(document.body.childNodes[0].textContent).toEqual(text);
});
it('Inserts the given text inside the reference element before the first child.', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
const text = 'lorem';
parent.appendChild(child);
document.body.appendChild(parent);
parent.insertAdjacentText('afterbegin', text);
expect(parent.childNodes[0].nodeType).toBe(Node.TEXT_NODE);
expect(parent.childNodes[0].textContent).toEqual(text);
expect(parent.childNodes[1]).toBe(child);
});
it('Inserts the given text inside the reference element after the last child.', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
const text = 'lorem';
parent.appendChild(child);
document.body.appendChild(parent);
parent.insertAdjacentText('beforeend', text);
expect(parent.childNodes[0] === child).toBe(true);
expect(parent.childNodes[1].nodeType).toBe(Node.TEXT_NODE);
expect(parent.childNodes[1].textContent).toEqual(text);
});
it('Inserts the given text right after the reference element.', () => {
const parent = document.createElement('div');
const text = 'lorem';
document.body.appendChild(parent);
parent.insertAdjacentText('afterend', text);
expect(parent.childNodes.length).toBe(0);
expect(document.body.childNodes[0] === parent).toBe(true);
expect(document.body.childNodes[1].nodeType).toBe(Node.TEXT_NODE);
expect(document.body.childNodes[1].textContent).toEqual(text);
});
it('Inserts the given text right after the reference element.', () => {
const parent = document.createElement('div');
const sibling = document.createElement('div');
const text = 'lorem';
document.body.appendChild(parent);
document.body.appendChild(sibling);
parent.insertAdjacentText('afterend', text);
expect(parent.childNodes.length).toBe(0);
expect(document.body.childNodes[0] === parent).toBe(true);
expect(document.body.childNodes[1].nodeType).toBe(Node.TEXT_NODE);
expect(document.body.childNodes[1].textContent).toEqual(text);
expect(document.body.childNodes[2] === sibling).toBe(true);
});
it('Does nothing is an emptry string is sent.', () => {
const parent = document.createElement('div');
const sibling = document.createElement('div');
document.body.appendChild(parent);
document.body.appendChild(sibling);
parent.insertAdjacentText('afterend', '');
expect(parent.childNodes.length).toBe(0);
expect(document.body.childNodes[0] === parent).toBe(true);
expect(document.body.childNodes[1] === sibling).toBe(true);
});
});
describe('replaceChildren()', () => {
it('Replaces the existing children of a ParentNode with a specified new set of children.', () => {
const node1 = document.createComment('test1');
const node2 = document.createComment('test2');
let isCalled = false;
jest
.spyOn(ParentNodeUtility, 'replaceChildren')
.mockImplementation((parentNode, ...nodes) => {
expect(parentNode).toBe(document);
expect(nodes).toEqual([node1, node2]);
isCalled = true;
});
document.replaceChildren(node1, node2);
expect(isCalled).toBe(true);
});
});
describe('matches()', () => {
it('Checks if the element matches a selector string.', () => {
const element = document.createElement('div');
element.className = 'container active';
expect(element.matches('.container.active')).toBe(true);
});
it('Checks if the element matches any selector in a string separated by comma.', () => {
const element = document.createElement('div');
element.className = 'container active';
expect(element.matches('.container, .active')).toBe(true);
});
it('Checks if the element matches with a descendant combinator', () => {
const grandparentElement = document.createElement('div');
grandparentElement.setAttribute('role', 'alert');
document.appendChild(grandparentElement);
const parentElement = document.createElement('div');
parentElement.setAttribute('role', 'status');
grandparentElement.appendChild(parentElement);
const element = document.createElement('div');
element.className = 'active';
parentElement.appendChild(element);
expect(element.matches('div[role="alert"] div.active')).toBe(true);
expect(element.matches('div[role="article"] div.active')).toBe(false);
expect(element.matches('.nonexistent-class div.active')).toBe(false);
});
it('Checks if a detached element matches with a descendant combinator', () => {
const parentElement = document.createElement('div');
parentElement.setAttribute('role', 'status');
const element = document.createElement('div');
element.className = 'active';
parentElement.appendChild(element);
expect(element.matches('div[role="status"] div.active')).toBe(true);
expect(element.matches('div[role="article"] div.active')).toBe(false);
expect(parentElement.matches('.nonexistent-class div[role="status"]')).toBe(false);
});
it('Checks if the element matches with a child combinator', () => {
const grandparentElement = document.createElement('div');
grandparentElement.setAttribute('role', 'alert');
const parentElement = document.createElement('div');
grandparentElement.setAttribute('role', 'status');
grandparentElement.appendChild(parentElement);
const element = document.createElement('div');
element.className = 'active';
parentElement.appendChild(element);
expect(element.matches('div[role="status"] > div.active')).toBe(true);
expect(element.matches('div[role="alert"] > div.active')).toBe(false);
expect(grandparentElement.matches('div > div[role="alert"]')).toBe(false);
});
});
describe('closest()', () => {
it('Finds the closest matching element when connected to DOM.', () => {
const div = document.createElement('div');
const span = document.createElement('span');
const article = document.createElement('article');
const b = document.createElement('b');
span.className = 'span';
article.appendChild(b);
span.appendChild(article);
div.appendChild(span);
document.body.appendChild(div);
expect(b.closest('div') === div).toBe(true);
expect(b.closest('div span') === span).toBe(true);
expect(b.closest('div .span') === span).toBe(true);
expect(b.closest('div .span b') === b).toBe(true);
expect(b.closest('div .span article b') === b).toBe(true);
});
it('Finds the closest matching element when not connected to DOM.', () => {
const div = document.createElement('div');
const span = document.createElement('span');
const article = document.createElement('article');
const b = document.createElement('b');
span.className = 'span';
article.appendChild(b);
span.appendChild(article);
div.appendChild(span);
expect(b.closest('div') === div).toBe(true);
expect(b.closest('div span') === span).toBe(true);
expect(b.closest('div .span') === span).toBe(true);
expect(b.closest('div .span b') === b).toBe(true);
expect(b.closest('div .span article b') === b).toBe(true);
});
});
describe('querySelectorAll()', () => {
it('Query CSS selector to find matching elements.', () => {
const element = document.createElement('div');
const expectedSelector = 'selector';
jest.spyOn(QuerySelector, 'querySelectorAll').mockImplementation((parentNode, selector) => {
expect(parentNode).toBe(document);
expect(selector).toEqual(expectedSelector);
return <INodeList<IElement>>[element];
});
const result = document.querySelectorAll(expectedSelector);
expect(result.length).toBe(1);
expect(result[0] === element).toBe(true);
});
});
describe('querySelector()', () => {
it('Query CSS selector to find a matching element.', () => {
const element = document.createElement('div');
const expectedSelector = 'selector';
jest.spyOn(QuerySelector, 'querySelector').mockImplementation((parentNode, selector) => {
expect(parentNode).toBe(document);
expect(selector).toEqual(expectedSelector);
return element;
});
expect(document.querySelector(expectedSelector) === element).toEqual(true);
});
});
describe('getElementsByClassName()', () => {
it('Returns an elements by class name.', () => {
const child = document.createElement('div');
const className = 'className';
jest
.spyOn(ParentNodeUtility, 'getElementsByClassName')
.mockImplementation((parentNode, requestedClassName) => {
expect(parentNode).toBe(element);
expect(requestedClassName).toEqual(className);
return <IHTMLCollection<IElement>>[child];
});
const result = element.getElementsByClassName(className);
expect(result.length).toBe(1);
expect(result[0] === child).toBe(true);
});
});
describe('getElementsByTagName()', () => {
it('Returns an elements by tag name.', () => {
const child = document.createElement('div');
const tagName = 'tag-name';
jest
.spyOn(ParentNodeUtility, 'getElementsByTagName')
.mockImplementation((parentNode, requestedTagName) => {
expect(parentNode).toBe(element);
expect(requestedTagName).toEqual(tagName);
return <IHTMLCollection<IElement>>[child];
});
const result = element.getElementsByTagName(tagName);
expect(result.length).toBe(1);
expect(result[0] === child).toBe(true);
});
});
describe('getElementsByTagNameNS()', () => {
it('Returns an elements by tag name and namespace.', () => {
const child = document.createElement('div');
const tagName = 'tag-name';
const namespaceURI = '/namespace/uri/';
jest
.spyOn(ParentNodeUtility, 'getElementsByTagNameNS')
.mockImplementation((parentNode, requestedNamespaceURI, requestedTagName) => {
expect(parentNode).toBe(element);
expect(requestedNamespaceURI).toEqual(namespaceURI);
expect(requestedTagName).toEqual(tagName);
return <IHTMLCollection<IElement>>[child];
});
const result = element.getElementsByTagNameNS(namespaceURI, tagName);
expect(result.length).toBe(1);
expect(result[0] === child).toBe(true);
});
});
describe('remove()', () => {
it('Removes the node from its parent.', () => {
const element = document.createElement('div');
let isCalled = false;
jest.spyOn(ChildNodeUtility, 'remove').mockImplementation((childNode) => {
expect(childNode).toBe(element);
isCalled = true;
});
element.remove();
expect(isCalled).toBe(true);
});
});
describe('replaceWith()', () => {
it('Replaces a Node in the children list of its parent with a set of Node or DOMString objects.', () => {
const node1 = document.createComment('test1');
const node2 = document.createComment('test2');
let isCalled = false;
jest.spyOn(ChildNodeUtility, 'replaceWith').mockImplementation((childNode, ...nodes) => {
expect(childNode).toBe(element);
expect(nodes).toEqual([node1, node2]);
isCalled = true;
});
element.replaceWith(node1, node2);
expect(isCalled).toBe(true);
});
});
describe('before()', () => {
it("Inserts a set of Node or DOMString objects in the children list of this ChildNode's parent, just before this ChildNode. DOMString objects are inserted as equivalent Text nodes.", () => {
const node1 = document.createComment('test1');
const node2 = document.createComment('test2');
let isCalled = false;
jest.spyOn(ChildNodeUtility, 'before').mockImplementation((childNode, ...nodes) => {
expect(childNode).toBe(element);
expect(nodes).toEqual([node1, node2]);
isCalled = true;
});
element.before(node1, node2);
expect(isCalled).toBe(true);
});
});
describe('after()', () => {
it("Inserts a set of Node or DOMString objects in the children list of this ChildNode's parent, just after this ChildNode. DOMString objects are inserted as equivalent Text nodes.", () => {
const node1 = document.createComment('test1');
const node2 = document.createComment('test2');
let isCalled = false;
jest.spyOn(ChildNodeUtility, 'after').mockImplementation((childNode, ...nodes) => {
expect(childNode).toBe(element);
expect(nodes).toEqual([node1, node2]);
isCalled = true;
});
element.after(node1, node2);
expect(isCalled).toBe(true);
});
});
describe('appendChild()', () => {
it('Updates the children property when appending an element child.', () => {
const div = document.createElement('div');
const span = document.createElement('span');
element.appendChild(document.createComment('test'));
element.appendChild(div);
element.appendChild(document.createComment('test'));
element.appendChild(span);
expect(element.children.length).toBe(2);
expect(element.children[0] === div).toBe(true);
expect(element.children[1] === span).toBe(true);
});
// See: https://developer.mozilla.org/en-US/docs/Web/API/DocumentFragment
it('Append the children instead of the actual element if the type is DocumentFragment.', () => {
const template = <HTMLTemplateElement>document.createElement('template');
template.innerHTML = '<div>Div</div><span>Span</span>';
const clone = template.content.cloneNode(true);
element.appendChild(clone);
expect(clone.childNodes.length).toBe(0);
expect(clone.children.length).toBe(0);
expect(element.innerHTML).toBe('<div>Div</div><span>Span</span>');
});
});
describe('removeChild()', () => {
it('Updates the children property when removing an element child.', () => {
const div = document.createElement('div');
const span = document.createElement('span');
element.appendChild(document.createComment('test'));
element.appendChild(div);
element.appendChild(document.createComment('test'));
element.appendChild(span);
element.removeChild(div);
expect(element.children).toEqual([span]);
});
});
describe('insertBefore()', () => {
it('Updates the children property when appending an element child.', () => {
const div1 = document.createElement('div');
const div2 = document.createElement('div');
const span = document.createElement('span');
element.appendChild(document.createComment('test'));
element.appendChild(div1);