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robotframework-seleniumlibrary

Web testing library for Robot Framework


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5

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SeleniumLibrary

.. contents::

Introduction

SeleniumLibrary_ is a web testing library for Robot Framework_ that utilizes the Selenium_ tool internally. The project is hosted on GitHub_ and downloads can be found from PyPI_.

SeleniumLibrary works with Selenium 3 and 4. It supports Python 3.6 or newer. In addition to the normal Python_ interpreter, it works also with PyPy_.

SeleniumLibrary is based on the old SeleniumLibrary_ that was forked to Selenium2Library_ and then later renamed back to SeleniumLibrary. See the Versions_ and History_ sections below for more information about different versions and the overall project history.

.. image:: https://img.shields.io/pypi/v/robotframework-seleniumlibrary.svg?label=version :target: https://pypi.python.org/pypi/robotframework-seleniumlibrary

.. image:: https://img.shields.io/pypi/dm/robotframework-seleniumlibrary.svg :target: https://pypi.python.org/pypi/robotframework-seleniumlibrary

.. image:: https://img.shields.io/pypi/l/robotframework-seleniumlibrary.svg :target: https://www.apache.org/licenses/LICENSE-2.0

.. image:: https://github.com/robotframework/SeleniumLibrary/actions/workflows/CI.yml/badge.svg?branch=master :target: https://github.com/robotframework/SeleniumLibrary/actions/workflows/CI.yml

Keyword Documentation

See keyword documentation_ for available keywords and more information about the library in general.

Installation

The recommended installation method is using pip_::

pip install --upgrade robotframework-seleniumlibrary

Running this command installs also the latest Selenium and Robot Framework versions, but you still need to install browser drivers_ separately. The --upgrade option can be omitted when installing the library for the first time.

Those migrating from Selenium2Library_ can install SeleniumLibrary so that it is exposed also as Selenium2Library::

pip install --upgrade robotframework-selenium2library

The above command installs the normal SeleniumLibrary as well as a new Selenium2Library version that is just a thin wrapper to SeleniumLibrary. That allows importing Selenium2Library in tests while migrating to SeleniumLibrary.

To install the last legacy Selenium2Library_ version, use this command instead::

pip install robotframework-selenium2library==1.8.0

With recent versions of pip it is possible to install directly from the GitHub_ repository. To install latest source from the master branch, use this command::

pip install git+https://github.com/robotframework/SeleniumLibrary.git

Please note that installation will take some time, because pip will clone the SeleniumLibrary_ project to a temporary directory and then perform the installation.

See Robot Framework installation instructions_ for detailed information about installing Python and Robot Framework itself. For more details about using pip see its own documentation <pip_>__.

Browser drivers

After installing the library, you still need to install browser and operating system specific browser drivers for all those browsers you want to use in tests. These are the exact same drivers you need to use with Selenium also when not using SeleniumLibrary. More information about drivers can be found from Selenium documentation__.

The general approach to install a browser driver is downloading a right driver, such as chromedriver for Chrome, and placing it into a directory that is in PATH__. Drivers for different browsers can be found via Selenium documentation or by using your favorite search engine with a search term like selenium chrome browser driver. New browser driver versions are released to support features in new browsers, fix bug, or otherwise, and you need to keep an eye on them to know when to update drivers you use.

Alternatively, you can use a tool called WebdriverManager__ which can find the latest version or when required, any version of appropriate webdrivers for you and then download and link/copy it into right location. Tool can run on all major operating systems and supports downloading of Chrome, Firefox, Opera & Edge webdrivers.

Here's an example:

.. code:: bash

  pip install webdrivermanager
  webdrivermanager firefox chrome --linkpath /usr/local/bin

__ https://seleniumhq.github.io/selenium/docs/api/py/index.html#drivers __ https://en.wikipedia.org/wiki/PATH_(variable) __ https://github.com/omenia/webdrivermanager

Usage

To use SeleniumLibrary in Robot Framework tests, the library needs to first be imported using the Library setting as any other library. The library accepts some import time arguments, which are documented in the keyword documentation_ along with all the keywords provided by the library.

When using Robot Framework, it is generally recommended to write as easy-to-understand tests as possible. The keywords provided by SeleniumLibrary is pretty low level, though, and often require implementation-specific arguments like element locators to be passed as arguments. It is thus typically a good idea to write tests using Robot Framework's higher-level keywords that utilize SeleniumLibrary keywords internally. This is illustrated by the following example where SeleniumLibrary keywords like Input Text are primarily used by higher-level keywords like Input Username.

.. code:: robotframework

*** Settings ***
Documentation     Simple example using SeleniumLibrary.
Library           SeleniumLibrary

*** Variables ***
${LOGIN URL}      http://localhost:7272
${BROWSER}        Chrome

*** Test Cases ***
Valid Login
    Open Browser To Login Page
    Input Username    demo
    Input Password    mode
    Submit Credentials
    Welcome Page Should Be Open
    [Teardown]    Close Browser

*** Keywords ***
Open Browser To Login Page
    Open Browser    ${LOGIN URL}    ${BROWSER}
    Title Should Be    Login Page

Input Username
    [Arguments]    ${username}
    Input Text    username_field    ${username}

Input Password
    [Arguments]    ${password}
    Input Text    password_field    ${password}

Submit Credentials
    Click Button    login_button

Welcome Page Should Be Open
    Title Should Be    Welcome Page

The above example is a slightly modified version of an example in a demo project_ that illustrates using Robot Framework and SeleniumLibrary. See the demo for more examples that you can also execute on your own machine. For more information about Robot Framework test data syntax in general see the Robot Framework User Guide_.

Extending SeleniumLibrary

Before creating your own library which extends the SeleniumLibrary, please consider would the extension be also useful also for general usage. If it could be useful also for general usage, please create a new issue describing the enhancement request and even better if the issue is backed up by a pull request.

If the enhancement is not generally useful, example solution is domain specific, then the SeleniumLibrary offers public APIs which can be used to build its own plugins and libraries. Plugin API allows us to add new keywords, modify existing keywords and modify the internal functionality of the library. Also new libraries can be built on top of the SeleniumLibrary. Please see extending documentation_ for more details about the available methods and for examples how the library can be extended.

Community

If the provided documentation is not enough, there are various community channels available:

  • robotframework-users_ mailing list
  • #seleniumlibrary and #seleniumlibrary-dev channels in Robot Framework Slack community_
  • Robot Framework forum_ has channel for SeleniumLibrary.
  • SeleniumLibrary issue tracker_ for bug reports and concrete enhancement requests
  • Other community channels_ including paid support

Versions

SeleniumLibrary has over the years lived under SeleniumLibrary and Selenium2Library names and different library versions have supported different Selenium and Python versions. This is summarized in the table below and the History_ section afterwards explains the project history a bit more.

================================== ========================== ========================== =============== Project Selenium Version Python Version Comment ================================== ========================== ========================== =============== SeleniumLibrary 2.9.2 and earlier Selenium 1 and 2 Python 2.5-2.7 The original SeleniumLibrary using Selenium RC API. Selenium2Library 1.8.0 and earlier Selenium 2 and 3 Python 2.6-2.7 Fork of SeleniumLibrary using Selenium WebDriver API. SeleniumLibrary 3.0 and 3.1 Selenium 2 and 3 Python 2.7 and 3.3+ Selenium2Library renamed and with Python 3 support and new architecture. SeleniumLibrary 3.2 Selenium 3 Python 2.7 and 3.4+ Drops Selenium 2 support. SeleniumLibrary 4.0 Selenium 3 Python 2.7 and 3.4+ Plugin API and support for event friging webdriver. SeleniumLibrary 4.1 Selenium 3 Python 2.7 and 3.5+ Drops Python 3.4 support. SeleniumLibrary 4.2 Selenium 3 Python 2.7 and 3.5+ Supports only Selenium 3.141.0 or newer. SeleniumLibrary 4.4 Selenium 3 and 4 Python 2.7 and 3.6+ New PythonLibCore and dropped Python 3.5 support. SeleniumLibrary 5.0 Selenium 3 and 4 Python 3.6+ Python 2 and Jython support is dropped. SeleniumLibrary 5.1 Selenium 3 and 4 Python 3.6+ Robot Framework 3.1 support is dropped. Selenium2Library 3.0 Depends on SeleniumLibrary Depends on SeleniumLibrary Thin wrapper for SeleniumLibrary 3.0 to ease transition. ================================== ========================== ========================== ===============

History

SeleniumLibrary originally used the Selenium Remote Controller (RC) API. When Selenium 2 was introduced with the new but backwards incompatible WebDriver API, SeleniumLibrary kept using Selenium RC and separate Selenium2Library using WebDriver was forked. These projects contained mostly the same keywords and in most cases Selenium2Library was a drop-in replacement for SeleniumLibrary.

Over the years development of the old SeleniumLibrary stopped and also the Selenium RC API it used was deprecated. Selenium2Library was developed further and replaced the old library as the de facto web testing library for Robot Framework.

When Selenium 3 was released in 2016, it was otherwise backwards compatible with Selenium 2, but the deprecated Selenium RC API was removed. This had two important effects:

  • The old SeleniumLibrary could not anymore be used with new Selenium versions. This project was pretty much dead.
  • Selenium2Library was badly named as it supported Selenium 3 just fine. This project needed a new name.

At the same time when Selenium 3 was released, Selenium2Library was going through larger architecture changes in order to ease future maintenance and to make adding Python 3 support easier. With all these big internal and external changes, it made sense to rename Selenium2Library back to SeleniumLibrary. This decision basically meant following changes:

  • Create separate repository for the old SeleniumLibrary_ to preserve its history since Selenium2Library was forked.
  • Rename Selenium2Library project and the library itself to SeleniumLibrary_.
  • Add new Selenium2Library_ project to ease transitioning from Selenium2Library to SeleniumLibrary.

Going forward, all new development will happen in the new SeleniumLibrary project.

.. _Robot Framework: https://robotframework.org .. _Selenium: https://www.seleniumhq.org/ .. _SeleniumLibrary: https://github.com/robotframework/SeleniumLibrary .. _Selenium2Library: https://github.com/robotframework/Selenium2Library .. _Old SeleniumLibrary: https://github.com/robotframework/OldSeleniumLibrary .. _pip: http://pip-installer.org .. _PyPI: https://pypi.python.org/pypi/robotframework-seleniumlibrary .. _GitHub: https://github.com/robotframework/SeleniumLibrary .. _Keyword Documentation: https://robotframework.org/SeleniumLibrary/SeleniumLibrary.html .. _Python: https://python.org .. _PyPy: https://pypy.org .. _Jython: https://jython.org/ .. _IronPython: https://ironpython.net/ .. _demo project: https://github.com/robotframework/WebDemo .. _Robot Framework User Guide: https://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html .. _Robot Framework installation instructions: https://github.com/robotframework/robotframework/blob/master/INSTALL.rst .. _robotframework-users: https://groups.google.com/group/robotframework-users .. _extending documentation: https://github.com/robotframework/SeleniumLibrary/blob/master/docs/extending/extending.rst .. _Slack community: https://robotframework-slack-invite.herokuapp.com .. _Robot Framework forum: https://forum.robotframework.org/ .. _issue tracker: https://github.com/robotframework/SeleniumLibrary/issues .. _Other community channels: https://robotframework.org/#community

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