Explain the differences between the Page Factory and Page Object Model approaches in automated testing

Page Object Model (POM) is a design pattern in test automation that involves creating classes representing pages of an application. These classes describe the page elements and methods to interact with them. This improves the readability and maintainability of tests.

Page Factory is an extension of POM, provided, for example, in Selenium, which simplifies the initialization of page elements using annotations (@FindBy). Page Factory automatically initializes web elements when the page object is created, reducing boilerplate code.

Main differences:

• POM is a concept, a pattern that can be implemented in various ways.
• Page Factory is a specific implementation of POM using annotations and lazy initialization of elements.

Example with Page Factory in Java:

public class LoginPage {
    @FindBy(id = "username")
    private WebElement usernameInput;

    @FindBy(id = "password")
    private WebElement passwordInput;

    @FindBy(id = "loginBtn")
    private WebElement loginButton;

    public LoginPage(WebDriver driver) {
        PageFactory.initElements(driver, this);
    }

    public void login(String user, String pass) {
        usernameInput.sendKeys(user);
        passwordInput.sendKeys(pass);
        loginButton.click();
    }
}