Automated App Testing Using Appium With TestNG [Tutorial]

Base test class

package com.lambdatest.appium.sample;
 
import static java.text.MessageFormat.format;
 
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
 
import com.lambdatest.appium.sample.enums.Environment;
import com.lambdatest.appium.sample.utils.Swipe;
import io.appium.java_client.AppiumDriver;
import io.appium.java_client.MobileElement;
import io.appium.java_client.remote.AndroidMobileCapabilityType;
import io.appium.java_client.remote.AutomationName;
import io.appium.java_client.remote.MobileCapabilityType;
import io.appium.java_client.service.local.AppiumDriverLocalService;
import io.appium.java_client.service.local.AppiumServiceBuilder;
import io.appium.java_client.service.local.flags.GeneralServerFlag;
import org.openqa.selenium.Capabilities;
import org.openqa.selenium.remote.CapabilityType;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.ITestContext;
import org.testng.annotations.AfterTest;
 
// 1.
public class BaseTest<D extends AppiumDriver<MobileElement>> {
   // 2.
   protected static final String LT_KEY  = System.getenv ("LT_ACCESS_KEY");
   protected static final String LT_USER = System.getenv ("LT_USERNAME");
 
   // 3.
   protected D                        driver;
   protected AppiumDriverLocalService service;
   protected Swipe<D>                 swipe;
   protected WebDriverWait            wait;
 
   // 4.
   @AfterTest (alwaysRun = true)
   public void tearDown (final ITestContext context) {
       if (Environment.valueOf (context.getCurrentXmlTest ()
           .getParameter ("environment")) == Environment.CLOUD) {
           final var status = (context.getFailedTests ()
               .size () > 0) ? "failed" : "passed";
           this.driver.executeScript (format ("lambda-status={0}", status));
       }
       this.driver.quit ();
       if (this.service != null && this.service.isRunning ()) {
           this.service.stop ();
       }
   }
 
   // 5.
   protected Capabilities getOptions (final Environment environment, final String platform, final String deviceName,
       final String version, final String appKey) {
       final var app = environment == Environment.CLOUD
                       ? System.getenv (appKey)
                       : System.getProperty ("user.dir") + appKey;
       final DesiredCapabilities capabilities = new DesiredCapabilities ();
       capabilities.setCapability (CapabilityType.PLATFORM_NAME, platform);