Additional waiting for testHyperLink NPE error #559

This commit adds a waiting time to ensure value is received prior
invoking getHyperLink method as there is a possibility for throwing NPE

Fixes : #559

Author: SougandhS

org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/core/LineTrackerTests.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2018 IBM Corporation and others.
+ * Copyright (c) 2000, 2024 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -181,6 +181,14 @@ public void testHyperLink() throws Exception {
 	    try {
 			ConsoleLineTracker.setDelegate(this);
 			fTarget = launchAndTerminate("ThrowsNPE");
+			long startTime = System.nanoTime();
+			long timeOut = 6000 * 1_000_000;
+			while (ConsoleLineTracker.getDocument() == null) {
+				if (System.nanoTime() - startTime > timeOut) {
+					break;
+				}
+				Thread.sleep(200);
+			}
 			getHyperlink(0, ConsoleLineTracker.getDocument());
 	    } finally {
 	        ConsoleLineTracker.setDelegate(null);