TestUtils.java

package io.appium.java_client;

import org.openqa.selenium.Dimension;
import org.openqa.selenium.Point;
import org.openqa.selenium.TimeoutException;
import org.openqa.selenium.WebElement;

import javax.annotation.Nullable;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.UnknownHostException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.Duration;
import java.util.function.Supplier;

public class TestUtils {
 private TestUtils() {
 }

 public static String getLocalIp4Address() throws SocketException, UnknownHostException {
 // https://stackoverflow.com/questions/9481865/getting-the-ip-address-of-the-current-machine-using-java
 try (final DatagramSocket socket = new DatagramSocket()) {
 socket.connect(InetAddress.getByName("8.8.8.8"), 10002);
 return socket.getLocalAddress().getHostAddress();
 }
 }

 public static Path resourcePathToAbsolutePath(String resourcePath) {
 URL url = ClassLoader.getSystemResource(resourcePath);
 if (url == null) {
 throw new IllegalArgumentException(String.format("Cannot find the '%s' resource", resourcePath));
 }
 try {
 return Paths.get(url.toURI()).toAbsolutePath();
 } catch (URISyntaxException e) {
 throw new IllegalArgumentException(e);
 }
 }

 public static void waitUntilTrue(Supplier<Boolean> func, Duration timeout, Duration interval) {
 long started = System.currentTimeMillis();
 RuntimeException lastError = null;
 while (System.currentTimeMillis() - started < timeout.toMillis()) {
 lastError = null;
 try {
 Boolean result = func.get();
 if (result != null && result) {
 return;
 }
 //noinspection BusyWait
 Thread.sleep(interval.toMillis());
 } catch (RuntimeException | InterruptedException e) {
 if (e instanceof InterruptedException) {
 throw new RuntimeException(e);
 } else {
 lastError = (RuntimeException) e;
 }
 }
 }
 if (lastError != null) {
 throw lastError;
 }
 throw new TimeoutException(String.format("Condition unmet after %sms timeout", timeout.toMillis()));
 }

 public static Point getCenter(WebElement webElement) {
 return getCenter(webElement, null);
 }

 public static Point getCenter(WebElement webElement, @Nullable Point location) {
 Dimension dim = webElement.getSize();
 if (location == null) {
 location = webElement.getLocation();
 }
 return new Point(location.x + dim.width / 2, location.y + dim.height / 2);
 }
}