Version: 1.9.0

Test Runners

You can use our Pytest integration to write end-to-end tests in Python.

Usage#

$ pip install pytest-playwright

Use the page fixture to write a basic test. See more examples.

def test_example_is_working(page):
page.goto("https://example.com")
assert page.innerText('h1') == 'Example Domain'
page.click("text=More information")

To run your tests, use pytest CLI.

# Run tests (Chromium and headless by default)
$ pytest
# Run tests in headful mode
$ pytest --headful
# Run tests in a different browser (chromium, firefox, webkit)
$ pytest --browser firefox
# Run tests in multiple browsers
$ pytest --browser chromium --browser webkit

If you want to add the CLI arguments automatically without specifying them, you can use the pytest.ini file:

Fixtures#

This plugin configures Playwright-specific fixtures for pytest. To use these fixtures, use the fixture name as an argument to the test function.

def test_my_app_is_working(fixture_name):
# Test using fixture_name
# ...

Function scope: These fixtures are created when requested in a test function and destroyed when the test ends.

Session scope: These fixtures are created when requested in a test function and destroyed when all tests end.

  • browser: Browser instance launched by Playwright.
  • browser_name: Browser name as string.
  • is_chromium, is_webkit, is_firefox: Booleans for the respective browser types.

Customizing fixture options: For browser and context fixtures, use the the following fixtures to define custom launch options.

Examples#

Configure Mypy typings for auto-completion#

from playwright.sync_api import Page
def test_visit_admin_dashboard(page: Page):
page.goto("/admin")
# ...

Skip test by browser#

import pytest
@pytest.mark.skip_browser("firefox")
def test_visit_example(page):
page.goto("https://example.com")
# ...

Run on a specific browser#

import pytest
@pytest.mark.only_browser("chromium")
def test_visit_example(page):
page.goto("https://example.com")
# ...

Configure base-url#

Start Pytest with the base-url argument.

$ pytest --base-url http://localhost:8080
def test_visit_example(page):
page.goto("/admin")
# -> Will result in http://localhost:8080/admin

Ignore HTTPS errors#

conftest.py

import pytest
@pytest.fixture(scope="session")
def browser_context_args(browser_context_args):
return {
**browser_context_args,
"ignoreHTTPSErrors": True
}

Use custom viewport size#

conftest.py

import pytest
@pytest.fixture(scope="session")
def browser_context_args(browser_context_args):
return {
**browser_context_args,
"viewport": {
"width": 1920,
"height": 1080,
}
}

Device emulation#

conftest.py

import pytest
@pytest.fixture(scope="session")
def browser_context_args(browser_context_args, playwright):
iphone_11 = playwright.devices['iPhone 11 Pro']
return {
**browser_context_args,
**iphone_11,
}

Debugging#

Use with pdb#

Use the breakpoint() statement in your test code to pause execution and get a pdb REPL.

def test_bing_is_working(page):
page.goto("https://bing.com")
breakpoint()
# ...

Screenshot on test failure#

You can capture screenshots for failed tests with a pytest runtest hook. Add this to your conftest.py file.

Note that this snippet uses slugify to convert test names to file paths, which can be installed with pip install python-slugify.

# In conftest.py
from slugify import slugify
from pathlib import Path
def pytest_runtest_makereport(item, call) -> None:
if call.when == "call":
if call.excinfo is not None and "page" in item.funcargs:
page = item.funcargs["page"]
screenshot_dir = Path(".playwright-screenshots")
screenshot_dir.mkdir(exist_ok=True)
page.screenshot(path=str(screenshot_dir / f"{slugify(item.nodeid)}.png"))

Deploy to CI#

Use the Playwright GitHub Action or guides for other CI providers to deploy your tests to CI/CD