Test ipywidgets with playwright and pytest.

Installation

pip install "pytest-ipywidgets[all]"

(Note that the optional [all] installs all dependencies, including compatible versions of notebook, jupyterlab and voila.)

Usage

Using solara-server (in-process)

If you want to test your ipywidgets with playwright in-process, you can use the solara_test fixture, use display to show your widget in the browser.

import ipywidgets as widgets
import playwright.sync_api
from IPython.display import display

def test_widget_button_solara(solara_test, page_session: playwright.sync_api.Page):
    # this all runs in-process
    button = widgets.Button(description="Click Me!")

    def change_description(obj):
        button.description = "Tested event"

    button.on_click(change_description)
    display(button)
    button_sel = page_session.locator("text=Click Me!")
    button_sel.wait_for()
    button_sel.click()
    page_session.locator("text=Tested event").wait_for()

Testing in the main Jupyter Environments (Notebook, Lab, Voila & Solara)

See https://solara.dev/documentation/advanced/howto/testing for more information.