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Selenium webdriver step library for behave BDD testing

Project description

behave-webdriver

behave-webdriver is a step library intended to allow users to easily write selenium webdriver tests with the behave BDD testing framework. Inspired by the webdriverio/cucumber-boilerplate project.

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For more details, see the behave-webdriver documentation

https://raw.githubusercontent.com/spyoungtech/behave-webdriver/master/docs/_static/behave-webdriver.gif

Installation

Installation is easy via pip. The install will require behave and selenium.:

pip install behave-webdriver

Using webdrivers

Selenium requires that you provide executables for the webdriver you want to use. Further, unless you specify the path to the binary explicitly, selenium expects that this executable is in PATH. See these driver installation notes for more details.

Usage

Basic usage of this library with behave requires the following steps:

  1. import the step implementations
  2. set the behave_driver attribute on the behave context in your environment.py file.
  3. write your feature file
  4. run behave

Importing the step implementations

In order for your feature file steps to match our step implementations, behave needs to find them in your project. This is as simple as importing our step definitions into your own step implementation file.

# features/steps/webdriver_example.py
from behave_webdriver.steps import *

For more information about step implementations, see the behave tutorial.

Set behave_driver in the environment

Our step implementations specifically look at the behave context for a behave_driver attribute to use to run your tests. In order for that to work, you’ll have to provide this attribute in your environment.py file.

# features/environment.py
import behave_webdriver

def before_all(context):
    context.behave_driver = behave_webdriver.Chrome()

def after_all(context):
    # cleanup after tests run
    context.behave_driver.quit()

The webdriver classes provided by behave-webdriver inherit from selenium’s webdriver classes, so they will accept all same positional and keyword arguments that selenium accepts.

Some webdrivers, such as Chrome, provide special classmethods like Chrome.headless which instantiates Chrome with options to run headless. This is useful, for example in headless testing environments.

def before_all(context):
    context.behave_driver = behave_webdriver.Chrome.headless()

Using a fixture

New in 0.1.1

You may also find it convenient to use a fixture to setup your driver as well. For example, to use our fixture with Firefox

from behave_webdriver.fixtures import fixture_browser
def before_all(context):
    use_fixture(fixture_browser, context, webdriver='Firefox')

This will also ensure that the browser is torn down at the corresponding cleanup point.

Writing the feature file

# my-minimal-project/features/myFeature.feature
Feature: Sample Snippets test
As a developer
I should be able to use given text snippets

Scenario: open URL
    Given the page url is not "http://webdriverjs.christian-bromann.com/"
    And   I open the url "http://webdriverjs.christian-bromann.com/"
    Then  I expect that the url is "http://webdriverjs.christian-bromann.com/"
    And   I expect that the url is not "http://google.com"


Scenario: click on link
    Given the title is not "two"
    And   I open the url "http://webdriverjs.christian-bromann.com/"
    When  I click on the link "two"
    Then  I expect that the title is "two"

Run behave

Then run the tests, just like any other behave test

behave

You should then see an output as follows:

Feature: Sample Snippets test # features/myFeature.feature:2
  As a developer
  I should be able to use given text snippets
  Scenario: open URL                                                          # features/myFeature.feature:6
    Given the page url is not "http://webdriverjs.christian-bromann.com/"     # ../../behave_webdriver/steps/given.py:136 0.012s
    And I open the url "http://webdriverjs.christian-bromann.com/"            # ../../behave_webdriver/steps/given.py:10 1.414s
    Then I expect that the url is "http://webdriverjs.christian-bromann.com/" # ../../behave_webdriver/steps/then.py:102 0.007s
    And I expect that the url is not "http://google.com"                      # ../../behave_webdriver/steps/then.py:102 0.007s

  Scenario: click on link                                          # features/myFeature.feature:13
    Given the title is not "two"                                   # ../../behave_webdriver/steps/given.py:81 0.006s
    And I open the url "http://webdriverjs.christian-bromann.com/" # ../../behave_webdriver/steps/given.py:10 0.224s
    When I click on the link "two"                                 # ../../behave_webdriver/steps/when.py:21 0.622s
    Then I expect that the title is "two"                          # ../../behave_webdriver/steps/then.py:10 0.006s

1 feature passed, 0 failed, 0 skipped
2 scenarios passed, 0 failed, 0 skipped
8 steps passed, 0 failed, 0 skipped, 0 undefined
Took 0m2.298s

Advanced usage; extending behave-webdriver

behave-webdriver is designed with you in-mind. You are free to extend the behavior of our webdriver classes to suit your unique needs. You can subclass our webdriver classes, use a custom selenium webdriver, write your own mixin, or use a mixin somebody else provides for selenium.

Example: selenium-requests

selenium-requests is a preexisting project that adds functionality of the popular requests library to selenium. It is simple to use selenium-requests with behave-webdriver. The following, and other examples, are available in the repo examples directory and in the full documentation.

# examples/selenium-requests/features/environment.py
from selenium import webdriver # or any custom webdriver
from behave_webdriver.driver import BehaveDriverMixin
from seleniumrequests import RequestMixin # or your own mixin

class BehaveRequestDriver(BehaveDriverMixin, RequestMixin, webdriver.Chrome):
    pass

def before_all(context):
    context.behave_driver = BehaveRequestDriver()
# examples/selenium-requests/features/steps/selenium_steps.py
from behave import *
from behave_webdriver.steps import *
from urllib.parse import urljoin

@given('I send a {method} request to the page "{page}"')
def send_request_page(context, method, page):
    url = urljoin(context.base_url, page)
    context.response = context.behave_driver.request(method, url)

@then('I expect the response text contains "{text}"')
def check_response_text_contains(context, text):
    assert text in context.response.text
# examples/selenium-requests/features/selenium-requests.feature
Feature: Using selenium-requests
  As a developer
  I should be able to extend behave-webdriver with selenium-requests

  Scenario: use selenium-requests with behave-webdriver
    # use a behave-webdriver step
    Given the base url is "http://127.0.0.1:8000"
    # use your own steps using selenium-requests features
    Given I send a GET request to the page "/"
    Then I expect the response text contains "<h1>DEMO APP</h1>"

Assuming you’re in the repository root (and have the demo app running) just run like any other project with behave

Results ✨

(behave-webdriver) $ behave examples/selenium-requests/features

DevTools listening on ws://127.0.0.1:12646/devtools/browser/1fe75b44-1c74-49fa-8e77-36c54d50cd24
Feature: Using selenium-requests # examples/selenium-requests/features/requests.feature:1
  As a developer
  I should be able to extend behave-webdriver with selenium-requests
  Scenario: use selenium-requests with behave-webdriver          # examples/selenium-requests/features/requests.feature:6
    Given the base url is "http://127.0.0.1:8000"                # behave_webdriver/steps/actions.py:162
    Given I send a GET request to the page "/"                   # examples/selenium-requests/features/steps/selenium_steps.py:11
    Then I expect the response text contains "<h1>DEMO APP</h1>" # examples/selenium-requests/features/steps/selenium_steps.py:17

1 feature passed, 0 failed, 0 skipped
1 scenario passed, 0 failed, 0 skipped
3 steps passed, 0 failed, 0 skipped, 0 undefined
Took 0m1.385s

Getting help ⛑

If you have any unanswered questions or encounter any issues, please feel welcome to raise an issue. We recognize that testers come in all different shapes, sizes, and backgrounds. We welcome any and all questions that may arise from using this library.

Contributing

Contributions are very much welcomed! If you have ideas or suggestions, please raise an issue or submit a PR.

List of step definitions 📝

We support all the steps supported by webdriverio/cucumber-boilerplate. We also support some additional niceties and plan to add more step definitions.

Given Steps 👷

  • I open the site "([^"]*)?"
  • I open the url "([^"]*)?"
  • I have a screen that is ([\d]+) by ([\d]+) pixels
  • I have a screen that is ([\d]+) pixels (broad|tall)
  • I have closed all but the first (window|tab)
  • I pause for (\d+)*ms
  • a (alertbox|confirmbox|prompt) is( not)* opened
  • the base url is "([^"]*)?"
  • the checkbox "([^"]*)?" is( not)* checked
  • the cookie "([^"]*)?" contains( not)* the value "([^"]*)?"
  • the cookie "([^"]*)?" does( not)* exist
  • the element "([^"]*)?" contains( not)* the same text as element "([^"]*)?"
  • the element "([^"]*)?" is( not)* ([\d]+)px (broad|tall)
  • the element "([^"]*)?" is( not)* empty
  • the element "([^"]*)?" is( not)* enabled
  • the element "([^"]*)?" is( not)* positioned at ([\d]+)px on the (x|y) axis
  • the element "([^"]*)?" is( not)* selected
  • the element "([^"]*)?" is( not)* visible
  • the element "([^"]*)?"( not)* contains any text
  • the element "([^"]*)?"( not)* contains the text "([^"]*)?"
  • the element "([^"]*)?"( not)* matches the text "([^"]*)?"
  • the page url is( not)* "([^"]*)?"
  • the title is( not)* "([^"]*)?"
  • the( css)* attribute "([^"]*)?" from element "([^"]*)?" is( not)* "([^"]*)?"
  • there is (an|no) element "([^"]*)?" on the page

When Steps ▶️

  • I open the site "([^"]*)?"
  • I open the url "([^"]*)?"
  • I accept the (alertbox|confirmbox|prompt)
  • I add "{value}" to the inputfield "{element}"
  • I clear the inputfield "{element}"
  • I click on the button "{element}"
  • I click on the element "{element}"
  • I click on the link "{link_text}"
  • I close the last opened (tab|window)
  • I delete the cookie "{cookie_key}"
  • I dismiss the (alertbox|confirmbox|prompt)
  • I doubleclick on the element "{element}"
  • I drag element "{from_element}" to element "{to_element}"
  • I enter "([^"]*)?" into the (alertbox|confirmbox|prompt)
  • I focus the last opened (tab|window)
  • I move to element "{element}" with an offset of {x_offset:d},{y_offset:d}
  • I move to element "{element}"
  • I pause for {milliseconds:d}ms
  • I press "{key}"
  • I scroll to element "{element}"
  • I select the option with the (text|value|name) "([^"]*)?" for element "([^"]*)?"
  • I select the {nth} option for element "{element}"
  • I set "{value}" to the inputfield "{element}"
  • I set a cookie "{cookie_key}" with the content "{value}"
  • I submit the form "{element}"

Then Steps ✔️

  • I expect the screen is ([\d]+) by ([\d]+) pixels
  • I expect a new (window|tab) has( not)* been opened
  • I expect that a (alertbox|confirmbox|prompt) is( not)* opened
  • I expect that a (alertbox|confirmbox|prompt)( not)* contains the text "([^"]*)?"
  • I expect that checkbox "([^"]*)?" is( not)* checked
  • I expect that cookie "([^"]*)?"( not)* contains "([^"]*)?"
  • I expect that cookie "([^"]*)?"( not)* exists
  • I expect that element "([^"]*)?" (has|does not have) the class "([^"]*)?"
  • I expect that element "([^"]*)?" becomes( not)* visible
  • I expect that element "([^"]*)?" does( not)* exist
  • I expect that element "([^"]*)?" is( not)* ([\d]+)px (broad|tall)
  • I expect that element "([^"]*)?" is( not)* empty
  • I expect that element "([^"]*)?" is( not)* enabled
  • I expect that element "([^"]*)?" is( not)* focused
  • I expect that element "([^"]*)?" is( not)* positioned at ([\d]+)px on the (x|y) axis
  • I expect that element "([^"]*)?" is( not)* selected
  • I expect that element "([^"]*)?" is( not)* visible
  • I expect that element "([^"]*)?" is( not)* within the viewport
  • I expect that element "([^"]*)?"( not)* contains any text
  • I expect that element "([^"]*)?"( not)* contains the same text as element "([^"]*)?"
  • I expect that element "([^"]*)?"( not)* contains the text "([^"]*)?"
  • I expect that element "([^"]*)?"( not)* matches the text "([^"]*)?"
  • I expect that the path is( not)* "([^"]*)?"
  • I expect that the title is( not)* "([^"]*)?"
  • I expect that the url is( not)* "([^"]*)?"
  • I expect that the( css)* attribute "([^"]*)?" from element "([^"]*)?" is( not)* "([^"]*)?"
  • I expect the url "([^"]*)?" is opened in a new (tab|window)
  • I expect the url to( not)* contain "([^"]*)?"
  • I wait on element "([^"]*)?"(?: for (\d+)ms)*(?: to( not)* (be checked|be enabled|be selected|be visible|contain a text|contain a value|exist))*

Acknowledgements ❤️

Special thanks to the authors and contributors of the webdriverio/cucumber-boilerplate project

Special thanks to the authors and contributors of behave

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