Running tests on Grid in Selenium Python - Framework Patterns

Framework Mode - Running tests on Grid

Folder Structure

selenium-python-grid-project/
├── tests/
│   ├── test_login.py
│   └── test_search.py
├── pages/
│   ├── login_page.py
│   └── search_page.py
├── utils/
│   ├── grid_driver.py
│   └── helpers.py
├── config/
│   ├── config.yaml
│   └── credentials.yaml
├── reports/
│   └── test_report.html
├── conftest.py
└── requirements.txt

Test Framework Layers

• Driver Layer: utils/grid_driver.py manages Selenium WebDriver setup to connect with Selenium Grid nodes remotely.
• Page Objects: pages/ contains classes representing web pages with element locators and actions.
• Tests: tests/ holds test scripts using pytest that call page objects and driver layer.
• Utilities: utils/helpers.py has helper functions like waits, screenshots, or logging.
• Configuration: config/config.yaml stores environment URLs, browser types, and Grid hub address; credentials.yaml stores user data securely.
• Fixtures: conftest.py defines pytest fixtures to initialize and quit remote WebDriver sessions using Grid.
• Reports: reports/ stores test execution reports for review.

Configuration Patterns

• Environment Config: Use config/config.yaml to define URLs for dev, staging, and production environments.
• Browser & Grid Hub: Specify browser type (e.g., chrome, firefox) and Selenium Grid hub URL in config file.
• Credentials: Store sensitive data like usernames and passwords in config/credentials.yaml and load securely.
• Dynamic Setup: Use pytest command line options or environment variables to select environment and browser at runtime.
• Example snippet from config.yaml:

  environments:
    dev:
      url: "http://dev.example.com"
    staging:
      url: "http://staging.example.com"
    production:
      url: "http://prod.example.com"
  browser: "chrome"
  grid_hub: "http://localhost:4444/wd/hub"
  

Test Reporting and CI/CD Integration

• Use pytest plugins like pytest-html to generate readable HTML reports saved in reports/.
• Integrate test runs with CI/CD pipelines (e.g., GitHub Actions, Jenkins) to run tests on Grid automatically on code changes.
• Configure CI to start Selenium Grid hub and nodes or connect to a cloud Grid service before tests run.
• Publish test reports as build artifacts or send notifications on failures.

Best Practices

• Use Page Object Model: Keep locators and page actions separate from tests for easy maintenance.
• Explicit Waits: Use explicit waits to handle dynamic page elements instead of fixed sleeps.
• Parameterize Tests: Allow browser and environment selection via config or command line to run tests flexibly on Grid.
• Isolate Tests: Ensure tests do not depend on each other to run safely in parallel on Grid nodes.
• Clean Up: Always quit remote WebDriver sessions to free Grid resources.

Self Check

Where in this folder structure would you add a new page object class for the "User Profile" page?

Key Result

Use a layered Selenium Python framework with Page Objects and pytest fixtures to run tests remotely on Selenium Grid.