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8e7fc06839
Folio 0.3.17 doesn't differentiate between expected and unexpected flakiness, thus no longer supporting the "flaky" annotation. Flaky specs are reported after run, but flaky specs do not render test run as failed. We'll track flakiness separately via a dashboard.
405 lines
17 KiB
TypeScript
405 lines
17 KiB
TypeScript
/**
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* Copyright 2018 Google Inc. All rights reserved.
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* Modifications copyright (c) Microsoft Corporation.
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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 { it, expect, describe } from './fixtures';
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import { verifyViewport } from './utils';
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import {PNG} from 'pngjs';
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import path from 'path';
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import fs from 'fs';
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describe('element screenshot', (suite, parameters) => {
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suite.skip(parameters.browserName === 'firefox' && parameters.headful);
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}, () => {
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it('should work', async ({page, server}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.goto(server.PREFIX + '/grid.html');
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await page.evaluate(() => window.scrollBy(50, 100));
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const elementHandle = await page.$('.box:nth-of-type(3)');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-bounding-box.png');
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});
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it('should take into account padding and border', async ({page}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.setContent(`
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<div style="height: 14px">oooo</div>
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<style>div {
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border: 2px solid blue;
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background: green;
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width: 50px;
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height: 50px;
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}
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</style>
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<div id="d"></div>
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`);
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const elementHandle = await page.$('div#d');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-padding-border.png');
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});
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it('should capture full element when larger than viewport in parallel', async ({page}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.setContent(`
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<div style="height: 14px">oooo</div>
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<style>
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div.to-screenshot {
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border: 1px solid blue;
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width: 600px;
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height: 600px;
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margin-left: 50px;
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}
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::-webkit-scrollbar{
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display: none;
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}
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</style>
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<div class="to-screenshot"></div>
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<div class="to-screenshot"></div>
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<div class="to-screenshot"></div>
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`);
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const elementHandles = await page.$$('div.to-screenshot');
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const promises = elementHandles.map(handle => handle.screenshot());
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const screenshots = await Promise.all(promises);
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expect(screenshots[2]).toMatchSnapshot('screenshot-element-larger-than-viewport.png');
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await verifyViewport(page, 500, 500);
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});
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it('should capture full element when larger than viewport', async ({page}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.setContent(`
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<div style="height: 14px">oooo</div>
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<style>
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div.to-screenshot {
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border: 1px solid blue;
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width: 600px;
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height: 600px;
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margin-left: 50px;
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}
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::-webkit-scrollbar{
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display: none;
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}
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</style>
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<div class="to-screenshot"></div>
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<div class="to-screenshot"></div>
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<div class="to-screenshot"></div>
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`);
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const elementHandle = await page.$('div.to-screenshot');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-larger-than-viewport.png');
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await verifyViewport(page, 500, 500);
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});
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it('should scroll element into view', async ({page}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.setContent(`
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<div style="height: 14px">oooo</div>
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<style>div.above {
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border: 2px solid blue;
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background: red;
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height: 1500px;
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}
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div.to-screenshot {
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border: 2px solid blue;
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background: green;
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width: 50px;
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height: 50px;
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}
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</style>
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<div class="above"></div>
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<div class="to-screenshot"></div>
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`);
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const elementHandle = await page.$('div.to-screenshot');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-scrolled-into-view.png');
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});
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it('should scroll 15000px into view', async ({page}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.setContent(`
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<div style="height: 14px">oooo</div>
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<style>div.above {
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border: 2px solid blue;
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background: red;
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height: 15000px;
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}
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div.to-screenshot {
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border: 2px solid blue;
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background: green;
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width: 50px;
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height: 50px;
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}
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</style>
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<div class="above"></div>
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<div class="to-screenshot"></div>
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`);
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const elementHandle = await page.$('div.to-screenshot');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-scrolled-into-view.png');
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});
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it('should work with a rotated element', async ({page}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.setContent(`<div style="position:absolute;
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top: 100px;
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left: 100px;
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width: 100px;
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height: 100px;
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background: green;
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transform: rotateZ(200deg);"> </div>`);
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const elementHandle = await page.$('div');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-rotate.png');
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});
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it('should fail to screenshot a detached element', async ({page, server}) => {
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await page.setContent('<h1>remove this</h1>');
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const elementHandle = await page.$('h1');
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await page.evaluate(element => element.remove(), elementHandle);
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const screenshotError = await elementHandle.screenshot().catch(error => error);
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expect(screenshotError.message).toContain('Element is not attached to the DOM');
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});
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it('should timeout waiting for visible', async ({page, server}) => {
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await page.setContent('<div style="width: 50px; height: 0"></div>');
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const div = await page.$('div');
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const error = await div.screenshot({ timeout: 3000 }).catch(e => e);
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expect(error.message).toContain('elementHandle.screenshot: Timeout 3000ms exceeded');
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expect(error.message).toContain('element is not visible');
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});
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it('should wait for visible', async ({page, server}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.goto(server.PREFIX + '/grid.html');
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await page.evaluate(() => window.scrollBy(50, 100));
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const elementHandle = await page.$('.box:nth-of-type(3)');
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await elementHandle.evaluate(e => e.style.visibility = 'hidden');
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let done = false;
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const promise = elementHandle.screenshot().then(buffer => {
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done = true;
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return buffer;
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});
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for (let i = 0; i < 10; i++)
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await page.evaluate(() => new Promise(f => requestAnimationFrame(f)));
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expect(done).toBe(false);
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await elementHandle.evaluate(e => e.style.visibility = 'visible');
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const screenshot = await promise;
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expect(screenshot).toMatchSnapshot('screenshot-element-bounding-box.png');
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});
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it('should work for an element with fractional dimensions', async ({page}) => {
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await page.setContent('<div style="width:48.51px;height:19.8px;border:1px solid black;"></div>');
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const elementHandle = await page.$('div');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-fractional.png');
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});
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it('should work with a mobile viewport', (test, { browserName }) => {
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test.skip(browserName === 'firefox');
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}, async ({browser, server}) => {
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const context = await browser.newContext({viewport: { width: 320, height: 480 }, isMobile: true});
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const page = await context.newPage();
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await page.goto(server.PREFIX + '/grid.html');
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await page.evaluate(() => window.scrollBy(50, 100));
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const elementHandle = await page.$('.box:nth-of-type(3)');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-mobile.png');
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await context.close();
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});
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it('should work with device scale factor', (test, { browserName }) => {
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test.skip(browserName === 'firefox');
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}, async ({browser, server}) => {
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const context = await browser.newContext({ viewport: { width: 320, height: 480 }, deviceScaleFactor: 2 });
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const page = await context.newPage();
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await page.goto(server.PREFIX + '/grid.html');
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await page.evaluate(() => window.scrollBy(50, 100));
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const elementHandle = await page.$('.box:nth-of-type(3)');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-mobile-dsf.png');
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await context.close();
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});
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it('should work for an element with an offset', async ({page}) => {
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await page.setContent('<div style="position:absolute; top: 10.3px; left: 20.4px;width:50.3px;height:20.2px;border:1px solid black;"></div>');
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const elementHandle = await page.$('div');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-fractional-offset.png');
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});
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it('should take screenshots when default viewport is null', async ({server, browser}) => {
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const context = await browser.newContext({ viewport: null });
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const page = await context.newPage();
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await page.setContent(`<div style='height: 10000px; background: red'></div>`);
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const windowSize = await page.evaluate(() => ({ width: window.innerWidth * window.devicePixelRatio, height: window.innerHeight * window.devicePixelRatio }));
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const sizeBefore = await page.evaluate(() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight }));
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const screenshot = await page.screenshot();
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expect(screenshot).toBeInstanceOf(Buffer);
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const decoded = PNG.sync.read(screenshot);
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expect(decoded.width).toBe(windowSize.width);
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expect(decoded.height).toBe(windowSize.height);
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const sizeAfter = await page.evaluate(() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight }));
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expect(sizeBefore.width).toBe(sizeAfter.width);
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expect(sizeBefore.height).toBe(sizeAfter.height);
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await context.close();
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});
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it('should take fullPage screenshots when default viewport is null', async ({server, browser}) => {
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const context = await browser.newContext({ viewport: null });
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const page = await context.newPage();
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await page.goto(server.PREFIX + '/grid.html');
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const sizeBefore = await page.evaluate(() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight }));
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const screenshot = await page.screenshot({
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fullPage: true
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});
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expect(screenshot).toBeInstanceOf(Buffer);
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const sizeAfter = await page.evaluate(() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight }));
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expect(sizeBefore.width).toBe(sizeAfter.width);
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expect(sizeBefore.height).toBe(sizeAfter.height);
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await context.close();
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});
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it('should restore default viewport after fullPage screenshot', async ({ browser }) => {
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const context = await browser.newContext({ viewport: { width: 456, height: 789 } });
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const page = await context.newPage();
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await verifyViewport(page, 456, 789);
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const screenshot = await page.screenshot({ fullPage: true });
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expect(screenshot).toBeInstanceOf(Buffer);
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await verifyViewport(page, 456, 789);
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await context.close();
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});
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it('should restore viewport after page screenshot and exception', (test, { mode }) => {
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test.skip(mode !== 'default');
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}, async ({ browser, server }) => {
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const context = await browser.newContext({ viewport: { width: 350, height: 360 } });
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const page = await context.newPage();
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await page.goto(server.PREFIX + '/grid.html');
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const __testHookBeforeScreenshot = () => { throw new Error('oh my'); };
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const error = await page.screenshot({ fullPage: true, __testHookBeforeScreenshot } as any).catch(e => e);
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expect(error.message).toContain('oh my');
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await verifyViewport(page, 350, 360);
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await context.close();
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});
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it('should restore viewport after page screenshot and timeout', (test, { mode }) => {
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test.skip(mode !== 'default');
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}, async ({ browser, server }) => {
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const context = await browser.newContext({ viewport: { width: 350, height: 360 } });
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const page = await context.newPage();
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await page.goto(server.PREFIX + '/grid.html');
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const __testHookAfterScreenshot = () => new Promise(f => setTimeout(f, 5000));
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const error = await page.screenshot({ fullPage: true, __testHookAfterScreenshot, timeout: 3000 } as any).catch(e => e);
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expect(error.message).toContain('page.screenshot: Timeout 3000ms exceeded');
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await verifyViewport(page, 350, 360);
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await page.setViewportSize({ width: 400, height: 400 });
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await page.waitForTimeout(3000); // Give it some time to wrongly restore previous viewport.
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await verifyViewport(page, 400, 400);
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await context.close();
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});
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it('should take element screenshot when default viewport is null and restore back', async ({server, browser}) => {
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const context = await browser.newContext({viewport: null});
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const page = await context.newPage();
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await page.setContent(`
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<div style="height: 14px">oooo</div>
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<style>
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div.to-screenshot {
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border: 1px solid blue;
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width: 600px;
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height: 600px;
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margin-left: 50px;
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}
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::-webkit-scrollbar{
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display: none;
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}
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</style>
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<div class="to-screenshot"></div>
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<div class="to-screenshot"></div>
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<div class="to-screenshot"></div>
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`);
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const sizeBefore = await page.evaluate(() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight }));
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const elementHandle = await page.$('div.to-screenshot');
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toBeInstanceOf(Buffer);
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const sizeAfter = await page.evaluate(() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight }));
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expect(sizeBefore.width).toBe(sizeAfter.width);
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expect(sizeBefore.height).toBe(sizeAfter.height);
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await context.close();
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});
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it('should restore viewport after element screenshot and exception', (test, { mode }) => {
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test.skip(mode !== 'default');
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}, async ({browser}) => {
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const context = await browser.newContext({ viewport: { width: 350, height: 360 } });
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const page = await context.newPage();
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await page.setContent(`<div style="width:600px;height:600px;"></div>`);
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const elementHandle = await page.$('div');
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const __testHookBeforeScreenshot = () => { throw new Error('oh my'); };
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const error = await elementHandle.screenshot({ __testHookBeforeScreenshot } as any).catch(e => e);
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expect(error.message).toContain('oh my');
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await verifyViewport(page, 350, 360);
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await context.close();
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});
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it('should wait for element to stop moving', async ({ page, server }) => {
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await page.setViewportSize({ width: 500, height: 500 });
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await page.goto(server.PREFIX + '/grid.html');
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const elementHandle = await page.$('.box:nth-of-type(3)');
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await elementHandle.evaluate(e => {
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e.classList.add('animation');
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return new Promise(f => requestAnimationFrame(() => requestAnimationFrame(f)));
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});
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const screenshot = await elementHandle.screenshot();
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expect(screenshot).toMatchSnapshot('screenshot-element-bounding-box.png');
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});
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it('should take screenshot of disabled button', async ({page}) => {
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await page.setViewportSize({ width: 500, height: 500 });
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await page.setContent(`<button disabled>Click me</button>`);
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const button = await page.$('button');
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const screenshot = await button.screenshot();
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expect(screenshot).toBeInstanceOf(Buffer);
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});
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it('path option should create subdirectories', async ({page, server, testInfo}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.goto(server.PREFIX + '/grid.html');
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await page.evaluate(() => window.scrollBy(50, 100));
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const elementHandle = await page.$('.box:nth-of-type(3)');
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const outputPath = testInfo.outputPath(path.join('these', 'are', 'directories', 'screenshot.png'));
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await elementHandle.screenshot({path: outputPath});
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expect(await fs.promises.readFile(outputPath)).toMatchSnapshot('screenshot-element-bounding-box.png');
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});
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it('should prefer type over extension', async ({page, server, testInfo}) => {
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await page.setViewportSize({width: 500, height: 500});
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await page.goto(server.PREFIX + '/grid.html');
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await page.evaluate(() => window.scrollBy(50, 100));
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const elementHandle = await page.$('.box:nth-of-type(3)');
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const outputPath = testInfo.outputPath('file.png');
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const buffer = await elementHandle.screenshot({ path: outputPath, type: 'jpeg' });
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expect([buffer[0], buffer[1], buffer[2]]).toEqual([0xFF, 0xD8, 0xFF]);
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});
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});
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