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Selenium webdriver fixture for py.test

Project description

This fixture provides a configured webdriver for Selenium browser tests, that takes screenshots for you on test failures.


Install using your favourite package installer:

pip install pytest-webdriver
# or
easy_install pytest-webdriver

Enable the fixture explicitly in your tests or (not required when using setuptools entry points):

pytest_plugins = ['pytest_webdriver']


This fixture connects to a remote selenium webdriver and returns the browser handle. It is scoped on a per-function level so you get one browser window per test.

To use this fixture, follow the following steps.

  1. Nominate a browser host, and start up the webdriver executable on that host.

  2. Download the latest zip file from here:

  3. Unpack onto the target host, and run the unpacked chromedriver binary executable.

  4. Set the environment variable SELENIUM_HOST to the IP address or hostname of the browser host. This defaults to the local hostname.

  5. Set the environment variable SELENIUM_PORT to the port number of the webdriver server. The default port number is 4444.

  6. Set the environment variable SELENIUM_BROWSER to the browser type. Defaults to chrome.

  7. Use the fixture as a test argument:

def test_mywebpage(webdriver):


You can also specify the selenium server address using a URI format using the SELENIUM_URL environment variable:

.. code:: bash

$ export SELENIUM_URI=http://localhost:4444/wd/hub

This is needed when dealing with selenium server and not chrome driver (see!topic/selenium-users/xodZDJxt81o). If SELENIUM_URI is not defined SELENIUM_HOST & SELENIUM_PORT will be used.

Automatic screenshots

When one of your browser tests fail, this plugin will take a screenshot for you and save it in the current working directory. The name will match the logical path to the test function that failed, like:


pytest-webdriver and PageObjects

If there is a pyramid_server fixture from the also running in the current test, it will detect this and set the root_uri attribute on the webdriver instance:

def test_my_pyramid_app(webdriver, pyramid_server):
    assert webdriver.root_uri == pyramid_server.uri

Why is this needed, you may ask? It can be used by the PageObjects library to automatically set the base URL to your web app. This saves on a lot of string concatenation. For example:

from page_objects import PageObject, PageElement

class LoginPage(PageObject):
    username = PageElement(id_='username')
    password = PageElement(name='password')
    login = PageElement(css='input[type="submit"]')

def test_login_page(webdriver, pyramid_server):
    page = LoginPage(webdriver)
    assert webdriver.getCurrentUrl() == pyramid_server.uri + '/foo/bar'


1.0 (2015-12-21)

  • Initial public release

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