What testing patterns and approaches have you applied in your practice?

In testing practice, I have applied the following templates and approaches:

• Page Object Pattern: for UI testing, to separate the interaction logic with interface elements from the tests themselves.
• Data-Driven Testing: running tests with different data sets to verify various scenarios.
• Behavior-Driven Development (BDD): writing tests in a format understandable by business analysts and developers, for example, using Cucumber.
• Test Automation Pyramid: balancing between unit tests, integration tests, and UI tests to optimize coverage and speed.
• Continuous Integration: automatically running tests on each commit for quick regression detection.

Example of a Page Object in Java for Selenium:

public class LoginPage {
    private WebDriver driver;

    private By usernameField = By.id("username");
    private By passwordField = By.id("password");
    private By loginButton = By.id("login");

    public LoginPage(WebDriver driver) {
        this.driver = driver;
    }

    public void enterUsername(String username) {
        driver.findElement(usernameField).sendKeys(username);
    }

    public void enterPassword(String password) {
        driver.findElement(passwordField).sendKeys(password);
    }

    public void clickLogin() {
        driver.findElement(loginButton).click();
    }
}