puppeteer-test-browser-extension
v2.0.0
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Perform end-to-end tests of a browser extension using Puppeteer.
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Puppeteer Test Browser Extension
Perform end-to-end tests of a browser extension using Puppeteer.
Use this to test your browser extension. At this time, only local tests are supported.
Currently, only Google Chrome is supported.
Installation:
npm install puppeteer-test-browser-extension
Usage — Local testing:
Import the module.
const bootstrapExtension = require('puppeteer-test-browser-extension');
That's using CommonJS modules. You can also import using ES Modules:
import bootstrapExtension from 'puppeteer-test-browser-extension';
Bootstrap the extension.
let browser, contentPage, extensionPage;
const extensionEnvironment = await bootstrapExtension({
pathToExtension: './test/test-extension', //The path to the uncompressed extension's folder. It shouldn't be a ZIP file.
contentUrl: `http://127.0.0.1:8080/test/content-page.html`, // The URL of the content page that is being browsed
//slowMo: 100, //(uncomment this line to slow down Puppeteer's actions)
//devtools: true, //(uncomment this line to open the browser's devtools)
});
browser = extensionEnvironment.browser;
contentPage = extensionEnvironment.contentPage;
extensionPage = extensionEnvironment.extensionPage;
Interact with the content page (the page that is being browsed).
// First, activate the content page
contentPage.bringToFront();
// (Assuming your content page contains <button>Submit</button>)
// The user should see the button on the web page
const btn = await contentPage.$('button');
const btnText = await btn.evaluate((e) => e.innerText);
expect(btnText).toEqual('Submit');
// You can use Puppeteer's features as usual
//Example: Click the button
await btn.click();
Interact with the extension's popup (which has been opened in a separate browser tab).
// First, activate the popup page
await extensionPage.bringToFront();
// (Assuming your content page contains <h1>Extension popup</h1>)
// The user should see the heading on the popup
const heading = await extensionPage.$('h1');
const extensionHeadingText = await heading.evaluate((e) => e.innerText);
expect(extensionHeadingText).toEqual('Extension popup');
Close Puppeteer's browser.
await browser.close();
Full example — Local testing:
This example uses jest to run tests.
const bootstrapExtension = require('puppeteer-test-browser-extension');
describe('Test browser extension', () => {
let browser, contentPage, extensionPage;
beforeAll(async () => {
const extensionEnvironment = await bootstrapExtension({
pathToExtension: './test/test-extension', //The path to the uncompressed extension's folder. It shouldn't be a ZIP file.
contentUrl: `http://127.0.0.1:8080/test/content-page.html`, // The URL of the content page that is being browsed
//slowMo: 100, //(uncomment this line to slow down Puppeteer's actions)
//devtools: true, //(uncomment this line to open the browser's devtools)
});
browser = extensionEnvironment.browser;
contentPage = extensionEnvironment.contentPage;
extensionPage = extensionEnvironment.extensionPage;
});
it("Should open the extension's popup", async () => {
// Use contentPage to interact with the content page (the page that is being browsed)
// First, activate the content page
contentPage.bringToFront();
// (Assuming your content page contains <button>Submit</button>)
// The user should see the button on the web page
const btn = await contentPage.$('button');
const btnText = await btn.evaluate((e) => e.innerText);
expect(btnText).toEqual('Submit');
// You can use Puppeteer's features as usual
//Example: Click the button
await btn.click();
// Use extensionPage to interact with the extension's popup
// First, activate the popup
await extensionPage.bringToFront();
// (Assuming your content page contains <h1>Extension popup</h1>)
// The user should see the heading on the popup
const heading = await extensionPage.$('h1');
const extensionHeadingText = await heading.evaluate((e) => e.innerText);
expect(extensionHeadingText).toEqual('Extension popup');
});
afterAll(async () => {
await browser.close();
});
});
Debugging Tips
Check out Google's tips for debugging with Puppeteer.
Website:
- Github: puppeteer-test-browser-extension by MauFrontier
- NPM: puppeteer-test-browser-extension by MauFrontier
- Inspiration: puppeteer-test-browser-ext by Daniel Caldas
LICENSE:
Licensed under the Apache License, Version 2.0 (the "License"). Check LICENSE.md for more details.
CREDIT:
Daniel Caldas deserves all the credit here. This is just slightly modified and re-packaged version of the work that he graciously released under the Apache license.
I just wanted to have this available as a public NPM package, and to add a few more features to it.