What is the main purpose of using the Page Object pattern in web interface test automation?

The Page Object pattern is used in web interface test automation to improve readability, maintainability, and reusability of test code.

Main goals:

• Abstract interactions with a web page into a separate class (page object).
• Hide details of locators and actions with interface elements.
• Make tests more understandable and less dependent on UI changes.

For example, instead of writing code to find and click a button in each test, a page class is created with methods reflecting user actions:

class LoginPage:
    def __init__(self, driver):
        self.driver = driver
        self.username_input = "#username"
        self.password_input = "#password"
        self.login_button = "#login"

    def login(self, username, password):
        self.driver.find_element_by_css_selector(self.username_input).send_keys(username)
        self.driver.find_element_by_css_selector(self.password_input).send_keys(password)
        self.driver.find_element_by_css_selector(self.login_button).click()

Tests use this class, which simplifies maintenance and improves code structure.