Simplified the Test Server startup

Removed the counting latch as Jetty will only start if it's not already running, so the latch was redundant. The stop wasn't being called anyway (which is good - we want the same server to run throughout the test session, vs restarting for each test class).

Also ensure the server binds only to localhost, vs to 0.0.0.0.

Fixes #1822

src/test/java/org/jsoup/integration/ConnectTest.java

@@ -12,7 +12,6 @@
 import org.jsoup.parser.HtmlTreeBuilder;
 import org.jsoup.parser.Parser;
 import org.jsoup.parser.XmlTreeBuilder;
-import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
@@ -41,11 +40,6 @@ public static void setUp() {
  echoUrl = EchoServlet.Url;
  }
 
- @AfterAll
- public static void tearDown() {
- TestServer.stop();
- }
-
  @Test
  public void canConnectToLocalServer() throws IOException {
  String url = HelloServlet.Url;

src/test/java/org/jsoup/integration/SessionIT.java

@@ -3,11 +3,9 @@
 import org.jsoup.Connection;
 import org.jsoup.Jsoup;
 import org.jsoup.UncheckedIOException;
-import org.jsoup.integration.servlets.EchoServlet;
 import org.jsoup.integration.servlets.FileServlet;
 import org.jsoup.integration.servlets.SlowRider;
 import org.jsoup.nodes.Document;
-import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
@@ -23,11 +21,6 @@ public static void setUp() {
  TestServer.start();
  }
 
- @AfterAll
- public static void tearDown() {
- TestServer.stop();
- }
-
  @Test
  public void multiThread() throws InterruptedException {
  int numThreads = 20;

src/test/java/org/jsoup/integration/SessionTest.java

@@ -8,7 +8,6 @@
 import org.jsoup.nodes.Document;
 import org.jsoup.parser.Parser;
 import org.jsoup.select.Elements;
-import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
@@ -24,11 +23,6 @@ public static void setUp() {
  TestServer.start();
  }
 
- @AfterAll
- public static void tearDown() {
- TestServer.stop();
- }
-
  private static Elements keyEls(String key, Document doc) {
  return doc.select("th:contains(" + key + ") + td");
  }

src/test/java/org/jsoup/integration/TestServer.java

@@ -5,12 +5,11 @@
 import org.eclipse.jetty.servlet.ServletHandler;
 import org.jsoup.integration.servlets.BaseServlet;
 
-import java.util.concurrent.atomic.AtomicInteger;
+import java.net.InetSocketAddress;
 
 public class TestServer {
- private static final Server jetty = new Server(0);
+ private static final Server jetty = new Server(new InetSocketAddress("localhost", 0));
  private static final ServletHandler handler = new ServletHandler();
- private static AtomicInteger latch = new AtomicInteger(0);
 
  static {
  jetty.setHandler(handler);
@@ -21,26 +20,10 @@ private TestServer() {
 
  public static void start() {
  synchronized (jetty) {
- int count = latch.getAndIncrement();
- if (count == 0) {
- try {
- jetty.start();
- } catch (Exception e) {
- throw new IllegalStateException(e);
- }
- }
- }
- }
-
- public static void stop() {
- synchronized (jetty) {
- int count = latch.getAndDecrement();
- if (count == 0) {
- try {
- jetty.stop();
- } catch (Exception e) {
- throw new IllegalStateException(e);
- }
+ try {
+ jetty.start(); // jetty will safely no-op a start on an already running instance
+ } catch (Exception e) {
+ throw new IllegalStateException(e);
  }
  }
  }

src/test/java/org/jsoup/nodes/FormElementTest.java

@@ -7,7 +7,6 @@
 import org.jsoup.integration.servlets.EchoServlet;
 import org.jsoup.integration.servlets.FileServlet;
 import org.jsoup.select.Elements;
-import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
@@ -27,11 +26,6 @@ public static void setUp() {
  TestServer.start();
  }
 
- @AfterAll
- public static void tearDown() {
- TestServer.stop();
- }
-
  @Test public void hasAssociatedControls() {
  //"button", "fieldset", "input", "keygen", "object", "output", "select", "textarea"
  String html = "<form id=1><button id=1><fieldset id=2 /><input id=3><keygen id=4><object id=5><output id=6>" +

src/test/java/org/jsoup/nodes/PositionTest.java

@@ -1,12 +1,8 @@
 package org.jsoup.nodes;
 
 import org.jsoup.Jsoup;
-import org.jsoup.integration.TestServer;
-import org.jsoup.integration.servlets.EchoServlet;
 import org.jsoup.integration.servlets.FileServlet;
 import org.jsoup.parser.Parser;
-import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
@@ -145,16 +141,6 @@ class PositionTest {
  assertEquals("6,1:80-6,17:96", comment.sourceRange().toString());
  }
 
- @BeforeAll
- static void setUp() {
- TestServer.start();
- }
-
- @AfterAll
- static void tearDown() {
- TestServer.stop();
- }
-
  @Test void tracksFromFetch() throws IOException {
  String url = FileServlet.urlTo("/htmltests/large.html"); // 280 K
  Document doc = Jsoup.connect(url).parser(TrackingParser).get();