selenium-automation

Create a BasePage class wrapping WebDriverWait and common actions like click and text entry, then subclass it per page with locators as class attributes. Tests instantiate page objects and call high-level methods like login(), keeping test code separate from locator logic.

Use explicit waits via WebDriverWait with expected conditions such as element_to_be_clickable or visibility_of_element_located. Avoid time.sleep() and prefer explicit waits over implicit waits for handling dynamic content reliably.

ID is the most reliable locator, followed by name and CSS selectors. Use XPath for complex relationships like sibling traversal, and avoid fragile selectors based on deep structural paths or classes that change frequently.

Yes, add the --headless argument to Chrome options for headless execution, which speeds up runs. Use pytest-xdist for parallel test execution and Selenium Grid for distributing tests across browsers and machines.

Use the Select class for dropdowns with select_by_visible_text or select_by_value. Switch to alerts via driver.switch_to.alert to accept or dismiss, and use driver.switch_to.frame() for frames, returning with switch_to.default_content().

Flakiness usually comes from hard-coded sleeps, brittle selectors, or race conditions with dynamic content. Replace sleeps with explicit waits, capture screenshots on failure with driver.save_screenshot(), and inspect page source when elements are not found.