Upgrading from Selenium to Playwright
Posted by Pete McBreen 16 Sep 2021 at 22:37
With a large suite of automated Selenium tests, it might not make much sense to rewrite existing tests to use Playwright, but for new test suites it might make sense to switch over to Playwright. It has better affordances for testing, has easy control over the browser contexts without that getting in the way for normal usage and deals with single page applications and websockets. The python samples below are equivalent (other than playwright does not show browser by default).
import pytest from playwright.sync_api import sync_playwright @pytest.fixture def browser(): playwright = sync_playwright().start() browser = playwright.chromium.launch() # use params headless=False to see browser yield browser browser.close() playwright.stop() def test_blog_title(browser): page = browser.new_page() page.goto("https://www.selenium.dev/") # find the blog link in the header and then click on that link page.click("#main_navbar :text('blog')") title = page.title() assert title.startswith("Blog | Selenium"), title h1text = page.wait_for_selector('h1') assert h1text.inner_text() == "Selenium Blog"
import pytest from selenium import webdriver from selenium.webdriver.common.by import By @pytest.fixture def webbrowser(): firefox = webdriver.Firefox() # default is to show the browser, use options to make headless yield firefox firefox.close() def test_blog_title(webbrowser): webbrowser.get("https://www.selenium.dev/") # want the blog link from header, so two stage process to get correct element header = webbrowser.find_element(By.ID,'main_navbar') blog = header.find_element(By.PARTIAL_LINK_TEXT , 'Blog') blog.click() title = webbrowser.title assert "Blog | Selenium" in title, title assert webbrowser.find_element(By.CSS_SELECTOR, 'h1').text == "Selenium Blog"