Python Code for Automation using BDD

Python is a powerful tool for automating tasks, and when paired with Behavior-Driven Development (BDD), it becomes even more effective. BDD allows teams to collaborate closely by writing tests in a human-readable format.

Using Python with BDD, testers can describe behavior in plain language, translating directly into executable tests.

In this article, I’ll show you an example Python code which uses BDD for automation. The example code automatically opens the chrome browser and navigates to the specified URL.

The following is the BDD code, on example of how you could write a Behavior-Driven Development (BDD) test using a framework like Cucumber and Selenium to test opening a browser window and navigating to Google.

Feature: Open and navigate to Google

  Scenario: User opens a browser window and navigates to Google
    Given the user opens a browser window
    When the user navigates to "https://www.google.com"
    Then the user should see the Google homepage

Let’s implement the step definitions using Python and Selenium.

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from behave import given, when, then
import time

@given('the user opens a browser window')
def open_browser(context):
    context.driver = webdriver.Chrome()  # You can use any other browser driver as per your preference

@when('the user navigates to "{url}"')
def navigate_to_url(context, url):
    context.driver.get(url)
    time.sleep(2)  # Adding a brief pause for demonstration purposes

@then('the user should see the Google homepage')
def verify_google_homepage(context):
    assert "Google" in context.driver.title

    # Optionally, you can check for other elements on the page to confirm the navigation
    # For example:
    # assert context.driver.find_element_by_name("q").is_displayed()  # Checking if the search bar is displayed

    context.driver.quit()

Make sure you have the necessary dependencies installed (selenium, behave, and the appropriate browser driver such as ChromeDriver). My code sets up a basic BDD scenario using Cucumber syntax and implements the step definitions in Python using Selenium for browser automation.

Let’s understand how to run the Python code with BDD.

1. Make sure you have Python installed on your system. Then install the necessary libraries using pip. You also need to download the appropriate WebDriver for your browser (e.g., ChromeDriver for Google Chrome).

pip install selenium behave

2. Copy the feature code into a file with the `.feature` extension, for example, `google.feature`.

3. Copy the Python step definitions code into a Python file, for example, `steps.py`.

4. Open a terminal or command prompt, navigate to the directory containing your feature file and step definitions file, and run the following command:

behave

This command will execute the BDD test using the feature file and step definitions in the current directory. If everything is set up correctly, you should see the browser open, navigate to Google, and the test should pass.

Writing automation code is simple, if you are using the Python + BDD combination.

Python Code for Automation using BDD

Related Articles