Travel & Airline with Selenium

import org.testng.annotations.*;
import org.openqa.selenium.*;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import java.util.Map;
import org.openqa.selenium.support.ui.*;
import java.time.Duration;
import static org.openqa.selenium.support.ui.ExpectedConditions.*;

// Locators in this suite: By.id ×7 · By.name ×7 · By.xpath ×6 · By.cssSelector ×1 · data-testid ×9
public class SkyWaysBookingTest {
  static final String BASE = "https://www.practiceqaautomation.com";
  WebDriver driver;
  WebDriverWait wait;

  // Small helpers: every action takes a By and waits for its element first (no Thread.sleep).
  By tid(String id) { return By.cssSelector("[data-testid='" + id + "']"); }
  WebElement ready(By by) { return centre(wait.until(elementToBeClickable(by))); }
  void click(By by) { ready(by).click(); }
  WebElement nth(String id, int n) { return centre(wait.until(numberOfElementsToBeMoreThan(tid(id), n)).get(n)); }
  void clickNth(String id, int n) { nth(id, n).click(); }
  // Scroll to the middle of the screen first: Selenium only scrolls an element to the edge,
  // where a sticky header or a fixed bottom bar can cover it (ElementClickInterceptedException).
  WebElement centre(WebElement e) {
    ((JavascriptExecutor) driver).executeScript("arguments[0].scrollIntoView({block: 'center', inline: 'nearest'})", e);
    return e;
  }
  void type(By by, String text) { ready(by).sendKeys(text); }
  void select(By by, String value) { new Select(ready(by)).selectByValue(value); }
  void check(By by) { WebElement e = ready(by); if (!e.isSelected()) e.click(); }
  void expectText(By by, String text) { wait.until(textToBePresentInElementLocated(by, text)); }
  void expectVisible(By by) { wait.until(visibilityOfElementLocated(by)); }
  void expectNthText(String id, int n, String text) {
    wait.until(d -> d.findElements(tid(id)).size() > n && d.findElements(tid(id)).get(n).getText().contains(text));
  }

  @BeforeMethod
  public void setUp() {
    ChromeOptions options = new ChromeOptions();
    // Turn off Chrome's "Save password?" and "password found in a data breach" pop-ups: after a
    // login they take the keyboard and mouse away from the page, so later typing and clicks are lost.
    options.setExperimentalOption("prefs", Map.of(
        "credentials_enable_service", false,
        "profile.password_manager_enabled", false,
        "profile.password_manager_leak_detection", false));
    driver = new ChromeDriver(options);
    wait = new WebDriverWait(driver, Duration.ofSeconds(10));
  }

  @AfterMethod(alwaysRun = true)
  public void tearDown() { driver.quit(); }

  @Test
  public void booksAOnewayFlightForTwo() {
    driver.get(BASE + "/apps/flights");
    click(By.xpath("//button[normalize-space()='One way']"));
    type(By.id("from-city"), "Mum");
    click(tid("from-option-bom"));
    type(By.id("to-city"), "Del");
    click(tid("to-option-del"));
    clickNth("depart-day", 1);
    click(tid("passengers-toggle"));
    click(tid("adults-inc"));
    click(By.xpath("//button[normalize-space()='Done']"));
    expectText(tid("passengers-summary"), "2 adults");
    select(By.name("cabin-class"), "economy");
    click(By.xpath("//button[normalize-space()='Search flights']"));
    wait.until(urlContains("/apps/flights/results"));
    check(By.id("stops-0"));
    click(By.xpath("//button[normalize-space()='cheapest']"));
    clickNth("select-flight", 0);
    click(tid("fare-flex"));
    wait.until(urlContains("/apps/flights/passengers"));
    select(By.name("pax-0-title"), "mr");
    type(By.name("pax-0-first"), "Amir");
    type(By.id("pax-0-last"), "Khan");
    select(By.name("pax-1-title"), "ms");
    type(By.id("pax-1-first"), "Sara");
    type(By.name("pax-1-last"), "Khan");
    type(By.id("contact-email"), "amir@example.com");
    type(By.name("contact-phone"), "9876543210");
    click(By.xpath("//button[normalize-space()='Continue to seats']"));

    // Each pick auto-advances to the next traveller
    click(By.cssSelector("[data-testid^=\"seat-\"][data-status=\"available\"]"));
    click(By.cssSelector("[data-testid^=\"seat-\"][data-status=\"available\"]"));
    click(By.xpath("//button[normalize-space()='Continue to payment']"));
    type(By.id("card-number"), "4242424242424242");
    type(By.cssSelector("[placeholder='MM/YY']"), "1230");
    type(By.name("card-cvv"), "123");
    click(tid("pay-flight"));
    expectVisible(tid("ticket-confirmed"));
    expectText(tid("ticket-passengers"), "Sara Khan");
  }
}