mirror of
https://github.com/microsoft/playwright.git
synced 2024-12-15 06:02:57 +03:00
738 lines
28 KiB
TypeScript
738 lines
28 KiB
TypeScript
/**
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* Copyright Microsoft Corporation. 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 { mimeTypeToComparator } from 'playwright-core/lib/utils/comparators';
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import * as fs from 'fs';
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import { PNG } from 'pngjs';
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import * as path from 'path';
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import { pathToFileURL } from 'url';
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import { test, expect, stripAnsi, createImage, paintBlackPixels } from './playwright-test-fixtures';
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const pngComparator = mimeTypeToComparator['image/png'];
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test.describe.configure({ mode: 'parallel' });
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const IMG_WIDTH = 1280;
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const IMG_HEIGHT = 720;
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const whiteImage = createImage(IMG_WIDTH, IMG_HEIGHT, 255, 255, 255);
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const redImage = createImage(IMG_WIDTH, IMG_HEIGHT, 255, 0, 0);
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const greenImage = createImage(IMG_WIDTH, IMG_HEIGHT, 0, 255, 0);
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const blueImage = createImage(IMG_WIDTH, IMG_HEIGHT, 0, 0, 255);
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const files = {
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'helper.ts': `
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export const test = pwt.test.extend({
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auto: [ async ({}, run, testInfo) => {
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testInfo.snapshotSuffix = '';
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await run();
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}, { auto: true } ]
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});
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`
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};
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test('should fail to screenshot a page with infinite animation', async ({ runInlineTest }, testInfo) => {
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const infiniteAnimationURL = pathToFileURL(path.join(__dirname, '../assets/rotate-z.html'));
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await page.goto('${infiniteAnimationURL}');
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await expect(page).toHaveScreenshot({ timeout: 2000 });
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(stripAnsi(result.output)).toContain(`Timeout 2000ms exceeded while generating screenshot because page kept changing`);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-actual.png'))).toBe(true);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-expected.png'))).toBe(true);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-diff.png'))).toBe(true);
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expect(fs.existsSync(testInfo.outputPath('a.spec.js-snapshots', 'is-a-test-1.png'))).toBe(false);
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});
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test('should not fail when racing with navigation', async ({ runInlineTest }, testInfo) => {
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const infiniteAnimationURL = pathToFileURL(path.join(__dirname, '../assets/rotate-z.html'));
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': createImage(10, 10, 255, 0, 0),
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await Promise.all([
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page.goto('${infiniteAnimationURL}'),
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expect(page).toHaveScreenshot({
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name: 'snapshot.png',
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animations: "disabled",
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clip: { x: 0, y: 0, width: 10, height: 10 },
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}),
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]);
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});
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`
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});
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expect(result.exitCode).toBe(0);
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});
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test('should successfully screenshot a page with infinite animation with disableAnimation: true', async ({ runInlineTest }, testInfo) => {
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const infiniteAnimationURL = pathToFileURL(path.join(__dirname, '../assets/rotate-z.html'));
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await page.goto('${infiniteAnimationURL}');
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await expect(page).toHaveScreenshot({
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animations: "disabled",
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});
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});
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`
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}, { 'update-snapshots': true });
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expect(result.exitCode).toBe(0);
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expect(fs.existsSync(testInfo.outputPath('a.spec.js-snapshots', 'is-a-test-1.png'))).toBe(true);
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});
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test('should support clip option for page', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': createImage(50, 50, 255, 255, 255),
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot({
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name: 'snapshot.png',
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clip: { x: 0, y: 0, width: 50, height: 50, },
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});
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});
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`
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});
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expect(result.exitCode).toBe(0);
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});
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test('should support omitBackground option for locator', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await page.evaluate(() => {
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document.body.style.setProperty('width', '100px');
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document.body.style.setProperty('height', '100px');
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});
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await expect(page.locator('body')).toHaveScreenshot({
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name: 'snapshot.png',
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omitBackground: true,
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});
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});
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`
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}, { 'update-snapshots': true });
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expect(result.exitCode).toBe(0);
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const snapshotPath = testInfo.outputPath('a.spec.js-snapshots', 'snapshot.png');
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expect(fs.existsSync(snapshotPath)).toBe(true);
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const png = PNG.sync.read(fs.readFileSync(snapshotPath));
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expect.soft(png.width, 'image width must be 100').toBe(100);
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expect.soft(png.height, 'image height must be 100').toBe(100);
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expect.soft(png.data[0], 'image R must be 0').toBe(0);
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expect.soft(png.data[1], 'image G must be 0').toBe(0);
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expect.soft(png.data[2], 'image B must be 0').toBe(0);
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expect.soft(png.data[3], 'image A must be 0').toBe(0);
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});
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test('should fail to screenshot an element with infinite animation', async ({ runInlineTest }, testInfo) => {
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const infiniteAnimationURL = pathToFileURL(path.join(__dirname, '../assets/rotate-z.html'));
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await page.goto('${infiniteAnimationURL}');
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await expect(page.locator('body')).toHaveScreenshot({ timeout: 2000 });
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(stripAnsi(result.output)).toContain(`Timeout 2000ms exceeded while generating screenshot because element kept changing`);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-actual.png'))).toBe(true);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-expected.png'))).toBe(true);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-diff.png'))).toBe(true);
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expect(fs.existsSync(testInfo.outputPath('a.spec.js-snapshots', 'is-a-test-1.png'))).toBe(false);
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});
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test('should fail to screenshot an element that keeps moving', async ({ runInlineTest }, testInfo) => {
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const infiniteAnimationURL = pathToFileURL(path.join(__dirname, '../assets/rotate-z.html'));
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await page.goto('${infiniteAnimationURL}');
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await expect(page.locator('div')).toHaveScreenshot({ timeout: 2000 });
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(stripAnsi(result.output)).toContain(`Timeout 2000ms exceeded`);
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expect(stripAnsi(result.output)).toContain(`element is not stable - waiting`);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-actual.png'))).toBe(false);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-expected.png'))).toBe(false);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-diff.png'))).toBe(false);
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expect(fs.existsSync(testInfo.outputPath('a.spec.js-snapshots', 'is-a-test-1.png'))).toBe(false);
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});
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test('should generate default name', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot();
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(fs.existsSync(testInfo.outputPath('test-results', 'a-is-a-test', 'is-a-test-1-actual.png'))).toBe(true);
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expect(fs.existsSync(testInfo.outputPath('a.spec.js-snapshots', 'is-a-test-1.png'))).toBe(true);
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});
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test('should compile with different option combinations', async ({ runTSC }) => {
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const result = await runTSC({
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'a.spec.ts': `
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const { test } = pwt;
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot();
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await expect(page.locator('body')).toHaveScreenshot({ threshold: 0.2 });
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await expect(page).toHaveScreenshot({ maxDiffPixelRatio: 0.2 });
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await expect(page).toHaveScreenshot({
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threshold: 0.2,
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maxDiffPixels: 10,
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maxDiffPixelRatio: 0.2,
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animations: "disabled",
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omitBackground: true,
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timeout: 1000,
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});
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});
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`
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});
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expect(result.exitCode).toBe(0);
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});
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test('should fail when screenshot is different size', async ({ runInlineTest }) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': createImage(22, 33),
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot('snapshot.png', { timeout: 2000 });
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(result.output).toContain('Expected an image 22px by 33px, received 1280px by 720px.');
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});
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test('should fail when screenshot is different pixels', async ({ runInlineTest }) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': paintBlackPixels(whiteImage, 12345),
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot('snapshot.png', { timeout: 2000 });
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(result.output).toContain('Screenshot comparison failed');
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expect(result.output).toContain('12345 pixels');
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expect(result.output).not.toContain('Call log');
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expect(result.output).toContain('ratio 0.02');
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expect(result.output).toContain('Expected:');
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expect(result.output).toContain('Received:');
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});
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test('doesn\'t create comparison artifacts in an output folder for passed negated snapshot matcher', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': blueImage,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).not.toHaveScreenshot('snapshot.png');
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});
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`
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});
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expect(result.exitCode).toBe(0);
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const outputText = stripAnsi(result.output);
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const expectedSnapshotArtifactPath = testInfo.outputPath('test-results', 'a-is-a-test', 'snapshot-expected.png');
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const actualSnapshotArtifactPath = testInfo.outputPath('test-results', 'a-is-a-test', 'snapshot-actual.png');
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expect(outputText).not.toContain(`Expected: ${expectedSnapshotArtifactPath}`);
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expect(outputText).not.toContain(`Received: ${actualSnapshotArtifactPath}`);
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expect(fs.existsSync(expectedSnapshotArtifactPath)).toBe(false);
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expect(fs.existsSync(actualSnapshotArtifactPath)).toBe(false);
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});
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test('should fail on same snapshots with negate matcher', async ({ runInlineTest }) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': whiteImage,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).not.toHaveScreenshot('snapshot.png', { timeout: 2000 });
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(result.output).toContain('Screenshot comparison failed:');
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expect(result.output).toContain('Expected result should be different from the actual one.');
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});
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test('should write missing expectations locally twice and continue', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot('snapshot.png');
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await expect(page).toHaveScreenshot('snapshot2.png');
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console.log('Here we are!');
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});
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`
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});
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expect(result.exitCode).toBe(1);
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expect(result.failed).toBe(1);
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const snapshot1OutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
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expect(result.output).toContain(`Error: ${snapshot1OutputPath} is missing in snapshots, writing actual`);
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expect(pngComparator(fs.readFileSync(snapshot1OutputPath), whiteImage)).toBe(null);
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const snapshot2OutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot2.png');
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expect(result.output).toContain(`Error: ${snapshot2OutputPath} is missing in snapshots, writing actual`);
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expect(pngComparator(fs.readFileSync(snapshot2OutputPath), whiteImage)).toBe(null);
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expect(result.output).toContain('Here we are!');
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const stackLines = stripAnsi(result.output).split('\n').filter(line => line.includes(' at ')).filter(line => !line.includes(testInfo.outputPath()));
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expect(result.output).toContain('a.spec.js:8');
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expect(stackLines.length).toBe(0);
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});
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test('shouldn\'t write missing expectations locally for negated matcher', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).not.toHaveScreenshot('snapshot.png');
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});
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`
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});
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expect(result.exitCode).toBe(1);
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const snapshotOutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
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expect(result.output).toContain(`${snapshotOutputPath} is missing in snapshots, matchers using ".not" won\'t write them automatically.`);
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expect(fs.existsSync(snapshotOutputPath)).toBe(false);
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});
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test('should update snapshot with the update-snapshots flag', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': blueImage,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot('snapshot.png');
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});
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`
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}, { 'update-snapshots': true });
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expect(result.exitCode).toBe(0);
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const snapshotOutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
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expect(result.output).toContain(`${snapshotOutputPath} is re-generated, writing actual.`);
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expect(pngComparator(fs.readFileSync(snapshotOutputPath), whiteImage)).toBe(null);
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});
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test('shouldn\'t update snapshot with the update-snapshots flag for negated matcher', async ({ runInlineTest }, testInfo) => {
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const EXPECTED_SNAPSHOT = blueImage;
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const result = await runInlineTest({
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...files,
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'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).not.toHaveScreenshot('snapshot.png');
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});
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`
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}, { 'update-snapshots': true });
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expect(result.exitCode).toBe(0);
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const snapshotOutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
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expect(fs.readFileSync(snapshotOutputPath).equals(EXPECTED_SNAPSHOT)).toBe(true);
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});
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test('should silently write missing expectations locally with the update-snapshots flag', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).toHaveScreenshot('snapshot.png');
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});
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`
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}, { 'update-snapshots': true });
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expect(result.exitCode).toBe(0);
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const snapshotOutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
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expect(result.output).toContain(`${snapshotOutputPath} is missing in snapshots, writing actual`);
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const data = fs.readFileSync(snapshotOutputPath);
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expect(pngComparator(data, whiteImage)).toBe(null);
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});
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test('should not write missing expectations locally with the update-snapshots flag for negated matcher', async ({ runInlineTest }, testInfo) => {
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const result = await runInlineTest({
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...files,
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'a.spec.js': `
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const { test } = require('./helper');
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test('is a test', async ({ page }) => {
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await expect(page).not.toHaveScreenshot('snapshot.png');
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});
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`
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}, { 'update-snapshots': true });
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expect(result.exitCode).toBe(1);
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const snapshotOutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
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expect(result.output).toContain(`${snapshotOutputPath} is missing in snapshots, matchers using ".not" won\'t write them automatically.`);
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expect(fs.existsSync(snapshotOutputPath)).toBe(false);
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});
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test('should match multiple snapshots', async ({ runInlineTest }) => {
|
|
const result = await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/red.png': redImage,
|
|
'a.spec.js-snapshots/green.png': greenImage,
|
|
'a.spec.js-snapshots/blue.png': blueImage,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await Promise.all([
|
|
page.evaluate(() => document.documentElement.style.setProperty('background', '#f00')),
|
|
expect(page).toHaveScreenshot('red.png'),
|
|
]);
|
|
await Promise.all([
|
|
page.evaluate(() => document.documentElement.style.setProperty('background', '#0f0')),
|
|
expect(page).toHaveScreenshot('green.png'),
|
|
]);
|
|
await Promise.all([
|
|
page.evaluate(() => document.documentElement.style.setProperty('background', '#00f')),
|
|
expect(page).toHaveScreenshot('blue.png'),
|
|
]);
|
|
});
|
|
`
|
|
});
|
|
expect(result.exitCode).toBe(0);
|
|
});
|
|
|
|
test('should use provided name', async ({ runInlineTest }) => {
|
|
const result = await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/provided.png': whiteImage,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('provided.png');
|
|
});
|
|
`
|
|
});
|
|
expect(result.exitCode).toBe(0);
|
|
});
|
|
|
|
test('should use provided name via options', async ({ runInlineTest }) => {
|
|
const result = await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/provided.png': whiteImage,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot({ name: 'provided.png' });
|
|
});
|
|
`
|
|
});
|
|
expect(result.exitCode).toBe(0);
|
|
});
|
|
|
|
test('should respect maxDiffPixels option', async ({ runInlineTest }) => {
|
|
const BAD_PIXELS = 120;
|
|
const EXPECTED_SNAPSHOT = paintBlackPixels(whiteImage, BAD_PIXELS);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', { timeout: 2000 });
|
|
});
|
|
`
|
|
})).exitCode, 'make sure default comparison fails').toBe(1);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', {
|
|
maxDiffPixels: ${BAD_PIXELS}
|
|
});
|
|
});
|
|
`
|
|
})).exitCode, 'make sure maxDiffPixels option is respected').toBe(0);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'playwright.config.ts': `
|
|
module.exports = { projects: [
|
|
{ expect: { toHaveScreenshot: { maxDiffPixels: ${BAD_PIXELS} } } },
|
|
]};
|
|
`,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png');
|
|
});
|
|
`
|
|
})).exitCode, 'make sure maxDiffPixels option in project config is respected').toBe(0);
|
|
});
|
|
|
|
test('should satisfy both maxDiffPixelRatio and maxDiffPixels', async ({ runInlineTest }) => {
|
|
const BAD_RATIO = 0.25;
|
|
const BAD_COUNT = Math.floor(IMG_WIDTH * IMG_HEIGHT * BAD_RATIO);
|
|
const EXPECTED_SNAPSHOT = paintBlackPixels(whiteImage, BAD_COUNT);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', { timeout: 2000 });
|
|
});
|
|
`
|
|
})).exitCode, 'make sure default comparison fails').toBe(1);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', {
|
|
maxDiffPixels: ${Math.floor(BAD_COUNT / 2)},
|
|
maxDiffPixelRatio: ${BAD_RATIO},
|
|
timeout: 2000,
|
|
});
|
|
});
|
|
`
|
|
})).exitCode, 'make sure it fails when maxDiffPixels < actualBadPixels < maxDiffPixelRatio').toBe(1);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', {
|
|
maxDiffPixels: ${BAD_COUNT},
|
|
maxDiffPixelRatio: ${BAD_RATIO / 2},
|
|
timeout: 2000,
|
|
});
|
|
});
|
|
`
|
|
})).exitCode, 'make sure it fails when maxDiffPixelRatio < actualBadPixels < maxDiffPixels').toBe(1);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', {
|
|
maxDiffPixels: ${BAD_COUNT},
|
|
maxDiffPixelRatio: ${BAD_RATIO},
|
|
});
|
|
});
|
|
`
|
|
})).exitCode, 'make sure it passes when actualBadPixels < maxDiffPixelRatio && actualBadPixels < maxDiffPixels').toBe(0);
|
|
});
|
|
|
|
test('should respect maxDiffPixelRatio option', async ({ runInlineTest }) => {
|
|
const BAD_RATIO = 0.25;
|
|
const BAD_PIXELS = IMG_WIDTH * IMG_HEIGHT * BAD_RATIO;
|
|
const EXPECTED_SNAPSHOT = paintBlackPixels(whiteImage, BAD_PIXELS);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', { timeout: 2000 });
|
|
});
|
|
`
|
|
})).exitCode, 'make sure default comparison fails').toBe(1);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', {
|
|
maxDiffPixelRatio: ${BAD_RATIO}
|
|
});
|
|
});
|
|
`
|
|
})).exitCode, 'make sure maxDiffPixelRatio option is respected').toBe(0);
|
|
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'playwright.config.ts': `
|
|
module.exports = { projects: [
|
|
{ expect: { toHaveScreenshot: { maxDiffPixelRatio: ${BAD_RATIO} } } },
|
|
]};
|
|
`,
|
|
'a.spec.js-snapshots/snapshot.png': EXPECTED_SNAPSHOT,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png');
|
|
});
|
|
`
|
|
})).exitCode, 'make sure maxDiffPixels option in project config is respected').toBe(0);
|
|
});
|
|
|
|
test('should throw for invalid maxDiffPixels values', async ({ runInlineTest }) => {
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot({
|
|
maxDiffPixels: -1,
|
|
});
|
|
});
|
|
`
|
|
})).exitCode).toBe(1);
|
|
});
|
|
|
|
test('should throw for invalid maxDiffPixelRatio values', async ({ runInlineTest }) => {
|
|
expect((await runInlineTest({
|
|
...files,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot({
|
|
maxDiffPixelRatio: 12,
|
|
});
|
|
});
|
|
`
|
|
})).exitCode).toBe(1);
|
|
});
|
|
|
|
|
|
test('should attach expected/actual and no diff when sizes are different', async ({ runInlineTest }, testInfo) => {
|
|
const result = await runInlineTest({
|
|
...files,
|
|
'a.spec.js-snapshots/snapshot.png': createImage(2, 2),
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test.afterEach(async ({}, testInfo) => {
|
|
console.log('## ' + JSON.stringify(testInfo.attachments));
|
|
});
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png', { timeout: 2000 });
|
|
});
|
|
`
|
|
});
|
|
|
|
expect(result.exitCode).toBe(1);
|
|
const outputText = stripAnsi(result.output);
|
|
expect(outputText).toContain('Expected an image 2px by 2px, received 1280px by 720px.');
|
|
const attachments = outputText.split('\n').filter(l => l.startsWith('## ')).map(l => l.substring(3)).map(l => JSON.parse(l))[0];
|
|
for (const attachment of attachments)
|
|
attachment.path = attachment.path.replace(/\\/g, '/').replace(/.*test-results\//, '');
|
|
expect(attachments).toEqual([
|
|
{
|
|
name: 'expected',
|
|
contentType: 'image/png',
|
|
path: 'a-is-a-test/snapshot-expected.png'
|
|
},
|
|
{
|
|
name: 'actual',
|
|
contentType: 'image/png',
|
|
path: 'a-is-a-test/snapshot-actual.png'
|
|
},
|
|
]);
|
|
});
|
|
|
|
test('should fail with missing expectations and retries', async ({ runInlineTest }, testInfo) => {
|
|
const result = await runInlineTest({
|
|
...files,
|
|
'playwright.config.ts': `
|
|
module.exports = { retries: 1 };
|
|
`,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png');
|
|
});
|
|
`
|
|
});
|
|
|
|
expect(result.exitCode).toBe(1);
|
|
expect(result.failed).toBe(1);
|
|
const snapshotOutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
|
|
expect(result.output).toContain(`${snapshotOutputPath} is missing in snapshots, writing actual`);
|
|
const data = fs.readFileSync(snapshotOutputPath);
|
|
expect(pngComparator(data, whiteImage)).toBe(null);
|
|
});
|
|
|
|
test('should update expectations with retries', async ({ runInlineTest }, testInfo) => {
|
|
const result = await runInlineTest({
|
|
...files,
|
|
'playwright.config.ts': `
|
|
module.exports = { retries: 1 };
|
|
`,
|
|
'a.spec.js': `
|
|
const { test } = require('./helper');
|
|
test('is a test', async ({ page }) => {
|
|
await expect(page).toHaveScreenshot('snapshot.png');
|
|
});
|
|
`
|
|
}, { 'update-snapshots': true });
|
|
|
|
expect(result.exitCode).toBe(0);
|
|
expect(result.passed).toBe(1);
|
|
const snapshotOutputPath = testInfo.outputPath('a.spec.js-snapshots/snapshot.png');
|
|
expect(result.output).toContain(`${snapshotOutputPath} is missing in snapshots, writing actual`);
|
|
const data = fs.readFileSync(snapshotOutputPath);
|
|
expect(pngComparator(data, whiteImage)).toBe(null);
|
|
});
|
|
|