# Testing web apps using Puppeteer

Translations: [Français](https://github.com/avajs/ava-docs/blob/main/fr_FR/docs/recipes/puppeteer.md)

## Dependencies

- [Puppeteer](https://github.com/GoogleChrome/puppeteer): `npm install --save-dev puppeteer`

## Setup

The first step is setting up a helper to configure the environment:

`./test/_withPage.js`

```js
import puppeteer from 'puppeteer';

export default async (t, run) => {
	const browser = await puppeteer.launch();
	const page = await browser.newPage();
	try {
		await run(t, page);
	} finally {
		await page.close();
		await browser.close();
	}
};
```

## Usage example

`./test/main.js`

```js
import test from 'ava';
import withPage from './_withPage.js';

const url = 'https://google.com';

test('page title should contain "Google"', withPage, async (t, page) => {
	await page.goto(url);
	t.true((await page.title()).includes('Google'));
});

test('page should contain an element with `#hplogo` selector', withPage, async (t, page) => {
	await page.goto(url);
	t.not(await page.$('#hplogo'), null);
});

test('search form should match the snapshot', withPage, async (t, page) => {
	await page.goto(url);
	const innerHTML = await page.evaluate(form => form.innerHTML, await page.$('#searchform'));
	t.snapshot(innerHTML);
});
```