puppeteer/test/elementhandle.spec.js

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/**
* Copyright 2018 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const utils = require('./utils');
module.exports.addTests = function({testRunner, expect}) {
const {describe, xdescribe, fdescribe} = testRunner;
const {it, fit, xit} = testRunner;
const {beforeAll, beforeEach, afterAll, afterEach} = testRunner;
describe('ElementHandle.boundingBox', function() {
it('should work', async({page, server}) => {
await page.setViewport({width: 500, height: 500});
await page.goto(server.PREFIX + '/grid.html');
const elementHandle = await page.$('.box:nth-of-type(13)');
const box = await elementHandle.boundingBox();
expect(box).toEqual({ x: 100, y: 50, width: 50, height: 50 });
});
it('should handle nested frames', async({page, server}) => {
await page.setViewport({width: 500, height: 500});
await page.goto(server.PREFIX + '/frames/nested-frames.html');
const nestedFrame = page.frames()[1].childFrames()[1];
const elementHandle = await nestedFrame.$('div');
const box = await elementHandle.boundingBox();
expect(box).toEqual({ x: 28, y: 260, width: 264, height: 18 });
});
it('should return null for invisible elements', async({page, server}) => {
await page.setContent('<div style="display:none">hi</div>');
const element = await page.$('div');
expect(await element.boundingBox()).toBe(null);
});
it('should force a layout', async({page, server}) => {
await page.setViewport({ width: 500, height: 500 });
await page.setContent('<div style="width: 100px; height: 100px">hello</div>');
const elementHandle = await page.$('div');
await page.evaluate(element => element.style.height = '200px', elementHandle);
const box = await elementHandle.boundingBox();
expect(box).toEqual({ x: 8, y: 8, width: 100, height: 200 });
});
it('should work with SVG nodes', async({page, server}) => {
await page.setContent(`
<svg xmlns="http://www.w3.org/2000/svg" width="500" height="500">
<rect id="theRect" x="30" y="50" width="200" height="300"></rect>
</svg>
`);
const element = await page.$('#therect');
const pptrBoundingBox = await element.boundingBox();
const webBoundingBox = await page.evaluate(e => {
const rect = e.getBoundingClientRect();
return {x: rect.x, y: rect.y, width: rect.width, height: rect.height};
}, element);
expect(pptrBoundingBox).toEqual(webBoundingBox);
});
});
describe('ElementHandle.boxModel', function() {
it('should work', async({page, server}) => {
await page.goto(server.PREFIX + '/resetcss.html');
// Step 1: Add Frame and position it absolutely.
await utils.attachFrame(page, 'frame1', server.PREFIX + '/resetcss.html');
await page.evaluate(() => {
const frame = document.querySelector('#frame1');
frame.style = `
position: absolute;
left: 1px;
top: 2px;
`;
});
// Step 2: Add div and position it absolutely inside frame.
const frame = page.frames()[1];
const divHandle = (await frame.evaluateHandle(() => {
const div = document.createElement('div');
document.body.appendChild(div);
div.style = `
box-sizing: border-box;
position: absolute;
border-left: 1px solid black;
padding-left: 2px;
margin-left: 3px;
left: 4px;
top: 5px;
width: 6px;
height: 7px;
`;
return div;
})).asElement();
// Step 3: query div's boxModel and assert box values.
const box = await divHandle.boxModel();
expect(box.width).toBe(6);
expect(box.height).toBe(7);
expect(box.margin[0]).toEqual({
x: 1 + 4, // frame.left + div.left
y: 2 + 5,
});
expect(box.border[0]).toEqual({
x: 1 + 4 + 3, // frame.left + div.left + div.margin-left
y: 2 + 5,
});
expect(box.padding[0]).toEqual({
x: 1 + 4 + 3 + 1, // frame.left + div.left + div.marginLeft + div.borderLeft
y: 2 + 5,
});
expect(box.content[0]).toEqual({
x: 1 + 4 + 3 + 1 + 2, // frame.left + div.left + div.marginLeft + div.borderLeft + dif.paddingLeft
y: 2 + 5,
});
});
it('should return null for invisible elements', async({page, server}) => {
await page.setContent('<div style="display:none">hi</div>');
const element = await page.$('div');
expect(await element.boxModel()).toBe(null);
});
});
describe('ElementHandle.contentFrame', function() {
it('should work', async({page,server}) => {
await page.goto(server.EMPTY_PAGE);
await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
const elementHandle = await page.$('#frame1');
const frame = await elementHandle.contentFrame();
expect(frame).toBe(page.frames()[1]);
});
});
describe('ElementHandle.click', function() {
it('should work', async({page, server}) => {
await page.goto(server.PREFIX + '/input/button.html');
const button = await page.$('button');
await button.click();
expect(await page.evaluate(() => result)).toBe('Clicked');
});
it('should work for Shadow DOM v1', async({page, server}) => {
await page.goto(server.PREFIX + '/shadow.html');
const buttonHandle = await page.evaluateHandle(() => button);
await buttonHandle.click();
expect(await page.evaluate(() => clicked)).toBe(true);
});
it('should work for TextNodes', async({page, server}) => {
await page.goto(server.PREFIX + '/input/button.html');
const buttonTextNode = await page.evaluateHandle(() => document.querySelector('button').firstChild);
let error = null;
await buttonTextNode.click().catch(err => error = err);
expect(error.message).toBe('Node is not of type HTMLElement');
});
it('should throw for detached nodes', async({page, server}) => {
await page.goto(server.PREFIX + '/input/button.html');
const button = await page.$('button');
await page.evaluate(button => button.remove(), button);
let error = null;
await button.click().catch(err => error = err);
expect(error.message).toBe('Node is detached from document');
});
it('should throw for hidden nodes', async({page, server}) => {
await page.goto(server.PREFIX + '/input/button.html');
const button = await page.$('button');
await page.evaluate(button => button.style.display = 'none', button);
const error = await button.click().catch(err => err);
expect(error.message).toBe('Node is either not visible or not an HTMLElement');
});
it('should throw for recursively hidden nodes', async({page, server}) => {
await page.goto(server.PREFIX + '/input/button.html');
const button = await page.$('button');
await page.evaluate(button => button.parentElement.style.display = 'none', button);
const error = await button.click().catch(err => err);
expect(error.message).toBe('Node is either not visible or not an HTMLElement');
});
it('should throw for <br> elements', async({page, server}) => {
await page.setContent('hello<br>goodbye');
const br = await page.$('br');
const error = await br.click().catch(err => err);
expect(error.message).toBe('Node is either not visible or not an HTMLElement');
});
});
describe('ElementHandle.hover', function() {
it('should work', async({page, server}) => {
await page.goto(server.PREFIX + '/input/scrollable.html');
const button = await page.$('#button-6');
await button.hover();
expect(await page.evaluate(() => document.querySelector('button:hover').id)).toBe('button-6');
});
});
describe('ElementHandle.isVisible', function() {
it('should return false if element is not visible in viewport', async({page, server}) => {
await page.setViewport({ width: 1000, height: 400 });
await page.setContent(`
<html>
<head>
<style>
.scroll-container {
position: relative;
width: 600px;
background: green;
height: 150px;
overflow: hidden;
}
.red {
position: absolute;
top: 0;
left: 0;
height: 150px;
width: 150px;
background: red;
}
.blue {
position: absolute;
top: 0;
right: -160px;
height: 150px;
width: 150px;
background: blue;
}
</style>
</head>
<body>
<div class="scroll-container">
<div class="red"></div>
<div class="blue"></div>
</div>
</body>
</html>
`);
const box = await page.$('.red');
const blue = await page.$('.blue');
expect(await box.isIntersectingViewport()).toBe(true);
expect(await blue.isIntersectingViewport()).toBe(false);
});
});
describe('ElementHandle.screenshot', function() {
it('should work', async({page, server}) => {
await page.setViewport({width: 500, height: 500});
await page.goto(server.PREFIX + '/grid.html');
await page.evaluate(() => window.scrollBy(50, 100));
const elementHandle = await page.$('.box:nth-of-type(3)');
const screenshot = await elementHandle.screenshot();
expect(screenshot).toBeGolden('screenshot-element-bounding-box.png');
});
it('should take into account padding and border', async({page, server}) => {
await page.setViewport({width: 500, height: 500});
await page.setContent(`
something above
<style>div {
border: 2px solid blue;
background: green;
width: 50px;
height: 50px;
}
</style>
<div></div>
`);
const elementHandle = await page.$('div');
const screenshot = await elementHandle.screenshot();
expect(screenshot).toBeGolden('screenshot-element-padding-border.png');
});
it('should capture full element when larger than viewport', async({page, server}) => {
await page.setViewport({width: 500, height: 500});
await page.setContent(`
something above
<style>
div.to-screenshot {
border: 1px solid blue;
width: 600px;
height: 600px;
margin-left: 50px;
}
::-webkit-scrollbar{
display: none;
}
</style>
<div class="to-screenshot"></div>
`);
const elementHandle = await page.$('div.to-screenshot');
const screenshot = await elementHandle.screenshot();
expect(screenshot).toBeGolden('screenshot-element-larger-than-viewport.png');
expect(await page.evaluate(() => ({ w: window.innerWidth, h: window.innerHeight }))).toEqual({ w: 500, h: 500 });
});
it('should scroll element into view', async({page, server}) => {
await page.setViewport({width: 500, height: 500});
await page.setContent(`
something above
<style>div.above {
border: 2px solid blue;
background: red;
height: 1500px;
}
div.to-screenshot {
border: 2px solid blue;
background: green;
width: 50px;
height: 50px;
}
</style>
<div class="above"></div>
<div class="to-screenshot"></div>
`);
const elementHandle = await page.$('div.to-screenshot');
const screenshot = await elementHandle.screenshot();
expect(screenshot).toBeGolden('screenshot-element-scrolled-into-view.png');
});
it('should work with a rotated element', async({page, server}) => {
await page.setViewport({width: 500, height: 500});
await page.setContent(`<div style="position:absolute;
top: 100px;
left: 100px;
width: 100px;
height: 100px;
background: green;
transform: rotateZ(200deg);">&nbsp;</div>`);
const elementHandle = await page.$('div');
const screenshot = await elementHandle.screenshot();
expect(screenshot).toBeGolden('screenshot-element-rotate.png');
});
it('should fail to screenshot a detached element', async({page, server}) => {
await page.setContent('<h1>remove this</h1>');
const elementHandle = await page.$('h1');
await page.evaluate(element => element.remove(), elementHandle);
const screenshotError = await elementHandle.screenshot().catch(error => error);
expect(screenshotError.message).toBe('Node is either not visible or not an HTMLElement');
});
});
describe('ElementHandle.$', function() {
it('should query existing element', async({page, server}) => {
await page.goto(server.PREFIX + '/playground.html');
await page.setContent('<html><body><div class="second"><div class="inner">A</div></div></body></html>');
const html = await page.$('html');
const second = await html.$('.second');
const inner = await second.$('.inner');
const content = await page.evaluate(e => e.textContent, inner);
expect(content).toBe('A');
});
it('should return null for non-existing element', async({page, server}) => {
await page.setContent('<html><body><div class="second"><div class="inner">B</div></div></body></html>');
const html = await page.$('html');
const second = await html.$('.third');
expect(second).toBe(null);
});
});
describe('ElementHandle.$eval', function() {
it('should work', async({page, server}) => {
await page.setContent('<html><body><div class="tweet"><div class="like">100</div><div class="retweets">10</div></div></body></html>');
const tweet = await page.$('.tweet');
const content = await tweet.$eval('.like', node => node.innerText);
expect(content).toBe('100');
});
it('should retrieve content from subtree', async({page, server}) => {
const htmlContent = '<div class="a">not-a-child-div</div><div id="myId"><div class="a">a-child-div</div></div>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const content = await elementHandle.$eval('.a', node => node.innerText);
expect(content).toBe('a-child-div');
});
it('should throw in case of missing selector', async({page, server}) => {
const htmlContent = '<div class="a">not-a-child-div</div><div id="myId"></div>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const errorMessage = await elementHandle.$eval('.a', node => node.innerText).catch(error => error.message);
expect(errorMessage).toBe(`Error: failed to find element matching selector ".a"`);
});
});
describe('ElementHandle.$$eval', function() {
it('should work', async({page, server}) => {
await page.setContent('<html><body><div class="tweet"><div class="like">100</div><div class="like">10</div></div></body></html>');
const tweet = await page.$('.tweet');
const content = await tweet.$$eval('.like', nodes => nodes.map(n => n.innerText));
expect(content).toEqual(['100', '10']);
});
it('should retrieve content from subtree', async({page, server}) => {
const htmlContent = '<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>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const content = await elementHandle.$$eval('.a', nodes => nodes.map(n => n.innerText));
expect(content).toEqual(['a1-child-div', 'a2-child-div']);
});
it('should not throw in case of missing selector', async({page, server}) => {
const htmlContent = '<div class="a">not-a-child-div</div><div id="myId"></div>';
await page.setContent(htmlContent);
const elementHandle = await page.$('#myId');
const nodesLength = await elementHandle.$$eval('.a', nodes => nodes.length);
expect(nodesLength).toBe(0);
});
});
describe('ElementHandle.$$', function() {
it('should query existing elements', async({page, server}) => {
await page.setContent('<html><body><div>A</div><br/><div>B</div></body></html>');
const html = await page.$('html');
const elements = await html.$$('div');
expect(elements.length).toBe(2);
const promises = elements.map(element => page.evaluate(e => e.textContent, element));
expect(await Promise.all(promises)).toEqual(['A', 'B']);
});
it('should return empty array for non-existing elements', async({page, server}) => {
await page.setContent('<html><body><span>A</span><br/><span>B</span></body></html>');
const html = await page.$('html');
const elements = await html.$$('div');
expect(elements.length).toBe(0);
});
});
describe('ElementHandle.$x', function() {
it('should query existing element', async({page, server}) => {
await page.goto(server.PREFIX + '/playground.html');
await page.setContent('<html><body><div class="second"><div class="inner">A</div></div></body></html>');
const html = await page.$('html');
const second = await html.$x(`./body/div[contains(@class, 'second')]`);
const inner = await second[0].$x(`./div[contains(@class, 'inner')]`);
const content = await page.evaluate(e => e.textContent, inner[0]);
expect(content).toBe('A');
});
it('should return null for non-existing element', async({page, server}) => {
await page.setContent('<html><body><div class="second"><div class="inner">B</div></div></body></html>');
const html = await page.$('html');
const second = await html.$x(`/div[contains(@class, 'third')]`);
expect(second).toEqual([]);
});
});
};