Playwright-pytest login just once per session (sharing storage state)

README.md

Simplest way to use Playwright sharing the "state" among tests.

The first test won't have the storage file so it will get a new empty page with no context and set it up / login.

Further tests will get a Page instance injected that has the same context as the first one, reusing the signed-in state.

Check https://playwright.dev/python/docs/auth#reusing-signed-in-state

test_playwright_with_shared_context.py

import pytest


@pytest.fixture(scope="session")
def storage(tmp_path_factory):
    return tmp_path_factory.mktemp("session") / "state.json"


@pytest.fixture
def page(new_context, storage):
    if storage.exists():
        yield new_context(storage_state=storage).new_page()
    else:
        context = new_context()
        page = context.new_page()
        page.goto("https://httpbin.dev/cookies/set?login=foo&pass=bar")
        yield page
        context.storage_state(path=storage)


def test_basic_cookie(page):
    def handle_response(response):
        assert response.json() == {"login": "foo", "pass": "bar"}
    page.on('response', handle_response)

    page.goto("https://httpbin.dev/cookies")


def test_cookies_2(page):
    def handle_response(response):
        assert response.json() == {"login": "foo", "pass": "bar", "something_else": "baz"}
    page.on('response', handle_response)

    page.goto("https://httpbin.dev/cookies/set?something_else=baz")