mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
508 lines
17 KiB
TypeScript
508 lines
17 KiB
TypeScript
/**
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* Copyright 2018 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import expect from 'expect';
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import {
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getTestState,
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setupTestBrowserHooks,
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setupTestPageAndContextHooks,
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} from './mocha-utils'; // eslint-disable-line import/extensions
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import { CustomQueryHandler } from '../lib/cjs/puppeteer/common/QueryHandler.js';
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describe('querySelector', function () {
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setupTestBrowserHooks();
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setupTestPageAndContextHooks();
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describe('Page.$eval', function () {
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it('should work', async () => {
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const { page } = getTestState();
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await page.setContent('<section id="testAttribute">43543</section>');
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const idAttribute = await page.$eval('section', (e) => e.id);
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expect(idAttribute).toBe('testAttribute');
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});
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it('should accept arguments', async () => {
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const { page } = getTestState();
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await page.setContent('<section>hello</section>');
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const text = await page.$eval(
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'section',
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(e, suffix) => e.textContent + suffix,
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' world!'
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);
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expect(text).toBe('hello world!');
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});
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it('should accept ElementHandles as arguments', async () => {
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const { page } = getTestState();
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await page.setContent('<section>hello</section><div> world</div>');
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const divHandle = await page.$('div');
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const text = await page.$eval(
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'section',
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(e, div: HTMLElement) => e.textContent + div.textContent,
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divHandle
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);
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expect(text).toBe('hello world');
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});
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it('should throw error if no element is found', async () => {
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const { page } = getTestState();
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let error = null;
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await page
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.$eval('section', (e) => e.id)
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.catch((error_) => (error = error_));
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expect(error.message).toContain(
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'failed to find element matching selector "section"'
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);
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});
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});
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describe('pierceHandler', function () {
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beforeEach(async () => {
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const { page } = getTestState();
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await page.setContent(
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`<script>
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const div = document.createElement('div');
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const shadowRoot = div.attachShadow({mode: 'open'});
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const div1 = document.createElement('div');
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div1.textContent = 'Hello';
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div1.className = 'foo';
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const div2 = document.createElement('div');
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div2.textContent = 'World';
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div2.className = 'foo';
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shadowRoot.appendChild(div1);
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shadowRoot.appendChild(div2);
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document.documentElement.appendChild(div);
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</script>`
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);
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});
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it('should find first element in shadow', async () => {
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const { page } = getTestState();
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const div = await page.$('pierce/.foo');
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const text = await div.evaluate(
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(element: Element) => element.textContent
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);
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expect(text).toBe('Hello');
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});
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it('should find all elements in shadow', async () => {
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const { page } = getTestState();
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const divs = await page.$$('pierce/.foo');
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const text = await Promise.all(
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divs.map((div) =>
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div.evaluate((element: Element) => element.textContent)
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)
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);
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expect(text.join(' ')).toBe('Hello World');
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});
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});
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// The tests for $$eval are repeated later in this file in the test group 'QueryAll'.
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// This is done to also test a query handler where QueryAll returns an Element[]
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// as opposed to NodeListOf<Element>.
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describe('Page.$$eval', function () {
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it('should work', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<div>hello</div><div>beautiful</div><div>world!</div>'
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);
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const divsCount = await page.$$eval('div', (divs) => divs.length);
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expect(divsCount).toBe(3);
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});
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it('should accept extra arguments', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<div>hello</div><div>beautiful</div><div>world!</div>'
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);
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const divsCountPlus5 = await page.$$eval(
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'div',
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(divs, two: number, three: number) => divs.length + two + three,
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2,
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3
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);
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expect(divsCountPlus5).toBe(8);
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});
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it('should accept ElementHandles as arguments', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<section>2</section><section>2</section><section>1</section><div>3</div>'
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);
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const divHandle = await page.$('div');
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const sum = await page.$$eval(
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'section',
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(sections, div: HTMLElement) =>
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sections.reduce(
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(acc, section) => acc + Number(section.textContent),
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0
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) + Number(div.textContent),
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divHandle
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);
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expect(sum).toBe(8);
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});
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it('should handle many elements', async () => {
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const { page } = getTestState();
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await page.evaluate(
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`
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for (var i = 0; i <= 1000; i++) {
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const section = document.createElement('section');
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section.textContent = i;
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document.body.appendChild(section);
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}
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`
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);
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const sum = await page.$$eval('section', (sections) =>
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sections.reduce((acc, section) => acc + Number(section.textContent), 0)
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);
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expect(sum).toBe(500500);
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});
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});
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describe('Page.$', function () {
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it('should query existing element', async () => {
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const { page } = getTestState();
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await page.setContent('<section>test</section>');
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const element = await page.$('section');
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expect(element).toBeTruthy();
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});
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it('should return null for non-existing element', async () => {
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const { page } = getTestState();
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const element = await page.$('non-existing-element');
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expect(element).toBe(null);
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});
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});
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describe('Page.$$', function () {
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it('should query existing elements', async () => {
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const { page } = getTestState();
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await page.setContent('<div>A</div><br/><div>B</div>');
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const elements = await page.$$('div');
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expect(elements.length).toBe(2);
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const promises = elements.map((element) =>
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page.evaluate((e: HTMLElement) => e.textContent, element)
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);
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expect(await Promise.all(promises)).toEqual(['A', 'B']);
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});
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it('should return empty array if nothing is found', async () => {
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const { page, server } = getTestState();
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await page.goto(server.EMPTY_PAGE);
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const elements = await page.$$('div');
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expect(elements.length).toBe(0);
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});
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});
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describe('Path.$x', function () {
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it('should query existing element', async () => {
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const { page } = getTestState();
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await page.setContent('<section>test</section>');
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const elements = await page.$x('/html/body/section');
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expect(elements[0]).toBeTruthy();
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expect(elements.length).toBe(1);
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});
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it('should return empty array for non-existing element', async () => {
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const { page } = getTestState();
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const element = await page.$x('/html/body/non-existing-element');
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expect(element).toEqual([]);
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});
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it('should return multiple elements', async () => {
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const { page } = getTestState();
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await page.setContent('<div></div><div></div>');
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const elements = await page.$x('/html/body/div');
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expect(elements.length).toBe(2);
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});
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});
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describe('ElementHandle.$', function () {
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it('should query existing element', async () => {
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const { page, server } = getTestState();
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await page.goto(server.PREFIX + '/playground.html');
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await page.setContent(
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'<html><body><div class="second"><div class="inner">A</div></div></body></html>'
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);
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const html = await page.$('html');
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const second = await html.$('.second');
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const inner = await second.$('.inner');
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const content = await page.evaluate(
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(e: HTMLElement) => e.textContent,
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inner
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);
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expect(content).toBe('A');
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});
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it('should return null for non-existing element', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><div class="second"><div class="inner">B</div></div></body></html>'
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);
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const html = await page.$('html');
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const second = await html.$('.third');
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expect(second).toBe(null);
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});
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});
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describe('ElementHandle.$eval', function () {
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it('should work', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><div class="tweet"><div class="like">100</div><div class="retweets">10</div></div></body></html>'
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);
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const tweet = await page.$('.tweet');
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const content = await tweet.$eval(
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'.like',
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(node: HTMLElement) => node.innerText
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);
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expect(content).toBe('100');
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});
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it('should retrieve content from subtree', async () => {
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const { page } = getTestState();
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const htmlContent =
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'<div class="a">not-a-child-div</div><div id="myId"><div class="a">a-child-div</div></div>';
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await page.setContent(htmlContent);
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const elementHandle = await page.$('#myId');
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const content = await elementHandle.$eval(
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'.a',
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(node: HTMLElement) => node.innerText
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);
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expect(content).toBe('a-child-div');
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});
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it('should throw in case of missing selector', async () => {
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const { page } = getTestState();
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const htmlContent =
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'<div class="a">not-a-child-div</div><div id="myId"></div>';
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await page.setContent(htmlContent);
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const elementHandle = await page.$('#myId');
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const errorMessage = await elementHandle
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.$eval('.a', (node: HTMLElement) => node.innerText)
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.catch((error) => error.message);
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expect(errorMessage).toBe(
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`Error: failed to find element matching selector ".a"`
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);
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});
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});
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describe('ElementHandle.$$eval', function () {
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it('should work', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><div class="tweet"><div class="like">100</div><div class="like">10</div></div></body></html>'
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);
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const tweet = await page.$('.tweet');
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const content = await tweet.$$eval('.like', (nodes: HTMLElement[]) =>
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nodes.map((n) => n.innerText)
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);
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expect(content).toEqual(['100', '10']);
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});
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it('should retrieve content from subtree', async () => {
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const { page } = getTestState();
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const htmlContent =
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'<div class="a">not-a-child-div</div><div id="myId"><div class="a">a1-child-div</div><div class="a">a2-child-div</div></div>';
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await page.setContent(htmlContent);
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const elementHandle = await page.$('#myId');
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const content = await elementHandle.$$eval('.a', (nodes: HTMLElement[]) =>
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nodes.map((n) => n.innerText)
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);
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expect(content).toEqual(['a1-child-div', 'a2-child-div']);
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});
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it('should not throw in case of missing selector', async () => {
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const { page } = getTestState();
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const htmlContent =
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'<div class="a">not-a-child-div</div><div id="myId"></div>';
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await page.setContent(htmlContent);
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const elementHandle = await page.$('#myId');
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const nodesLength = await elementHandle.$$eval(
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'.a',
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(nodes) => nodes.length
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);
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expect(nodesLength).toBe(0);
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});
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});
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describe('ElementHandle.$$', function () {
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it('should query existing elements', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><div>A</div><br/><div>B</div></body></html>'
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);
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const html = await page.$('html');
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const elements = await html.$$('div');
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expect(elements.length).toBe(2);
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const promises = elements.map((element) =>
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page.evaluate((e: HTMLElement) => e.textContent, element)
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);
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expect(await Promise.all(promises)).toEqual(['A', 'B']);
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});
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it('should return empty array for non-existing elements', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><span>A</span><br/><span>B</span></body></html>'
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);
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const html = await page.$('html');
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const elements = await html.$$('div');
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expect(elements.length).toBe(0);
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});
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});
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describe('ElementHandle.$x', function () {
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it('should query existing element', async () => {
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const { page, server } = getTestState();
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await page.goto(server.PREFIX + '/playground.html');
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await page.setContent(
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'<html><body><div class="second"><div class="inner">A</div></div></body></html>'
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);
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const html = await page.$('html');
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const second = await html.$x(`./body/div[contains(@class, 'second')]`);
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const inner = await second[0].$x(`./div[contains(@class, 'inner')]`);
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const content = await page.evaluate(
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(e: HTMLElement) => e.textContent,
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inner[0]
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);
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expect(content).toBe('A');
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});
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it('should return null for non-existing element', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><div class="second"><div class="inner">B</div></div></body></html>'
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);
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const html = await page.$('html');
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const second = await html.$x(`/div[contains(@class, 'third')]`);
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expect(second).toEqual([]);
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});
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});
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// This is the same tests for `$$eval` and `$$` as above, but with a queryAll
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// handler that returns an array instead of a list of nodes.
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describe('QueryAll', function () {
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const handler: CustomQueryHandler = {
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queryAll: (element: Element, selector: string) =>
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Array.from(element.querySelectorAll(selector)),
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};
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before(() => {
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const { puppeteer } = getTestState();
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puppeteer.registerCustomQueryHandler('allArray', handler);
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});
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it('should have registered handler', async () => {
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const { puppeteer } = getTestState();
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expect(
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puppeteer.customQueryHandlerNames().includes('allArray')
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).toBeTruthy();
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});
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it('$$ should query existing elements', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><div>A</div><br/><div>B</div></body></html>'
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);
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const html = await page.$('html');
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const elements = await html.$$('allArray/div');
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expect(elements.length).toBe(2);
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const promises = elements.map((element) =>
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page.evaluate((e: HTMLElement) => e.textContent, element)
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);
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expect(await Promise.all(promises)).toEqual(['A', 'B']);
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});
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it('$$ should return empty array for non-existing elements', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<html><body><span>A</span><br/><span>B</span></body></html>'
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);
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const html = await page.$('html');
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const elements = await html.$$('allArray/div');
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expect(elements.length).toBe(0);
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});
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it('$$eval should work', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<div>hello</div><div>beautiful</div><div>world!</div>'
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);
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const divsCount = await page.$$eval(
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'allArray/div',
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(divs) => divs.length
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);
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expect(divsCount).toBe(3);
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});
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it('$$eval should accept extra arguments', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<div>hello</div><div>beautiful</div><div>world!</div>'
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);
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const divsCountPlus5 = await page.$$eval(
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'allArray/div',
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(divs, two: number, three: number) => divs.length + two + three,
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2,
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3
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);
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expect(divsCountPlus5).toBe(8);
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});
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it('$$eval should accept ElementHandles as arguments', async () => {
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const { page } = getTestState();
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await page.setContent(
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'<section>2</section><section>2</section><section>1</section><div>3</div>'
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);
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const divHandle = await page.$('div');
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const sum = await page.$$eval(
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'allArray/section',
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(sections, div: HTMLElement) =>
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sections.reduce(
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(acc, section) => acc + Number(section.textContent),
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0
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) + Number(div.textContent),
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divHandle
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);
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expect(sum).toBe(8);
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});
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it('$$eval should handle many elements', async () => {
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const { page } = getTestState();
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await page.evaluate(
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`
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for (var i = 0; i <= 1000; i++) {
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const section = document.createElement('section');
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section.textContent = i;
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document.body.appendChild(section);
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}
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`
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);
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const sum = await page.$$eval('allArray/section', (sections) =>
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sections.reduce((acc, section) => acc + Number(section.textContent), 0)
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);
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expect(sum).toBe(500500);
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});
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});
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});
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