From eb0ff1679bcfa05c90346a2b2562e27731197cd1 Mon Sep 17 00:00:00 2001
From: Jan Lahoda <jan.lahoda@oracle.com>
Date: Tue, 11 Nov 2025 19:17:15 +0100
Subject: [PATCH] Preventing an NPE for compact source files inside test roots.

---
 .../netbeans/modules/junit/ui/actions/TestClassInfoTask.java  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/java/junit.ui/src/org/netbeans/modules/junit/ui/actions/TestClassInfoTask.java b/java/junit.ui/src/org/netbeans/modules/junit/ui/actions/TestClassInfoTask.java
index d73a7f403ce8..82d09fdee26e 100644
--- a/java/junit.ui/src/org/netbeans/modules/junit/ui/actions/TestClassInfoTask.java
+++ b/java/junit.ui/src/org/netbeans/modules/junit/ui/actions/TestClassInfoTask.java
@@ -127,7 +127,9 @@ private static void collect(CompilationInfo info, TreePath clazz, List<TreePath>
         Trees trees = info.getTrees();
         Elements elements = info.getElements();
         TreeUtilities treeUtilities = info.getTreeUtilities();
-        int clazzPreferred = treeUtilities.findNameSpan((ClassTree) clazz.getLeaf())[0];
+        int[] classNameSpan = treeUtilities.findNameSpan((ClassTree) clazz.getLeaf());
+        int clazzPreferred = classNameSpan != null ? classNameSpan[0]
+                                                   : (int) trees.getSourcePositions().getStartPosition(clazz.getCompilationUnit(), clazz.getLeaf());
         TypeElement typeElement = (TypeElement) trees.getElement(clazz);
         TypeElement testcase = elements.getTypeElement(TESTCASE);
         NestedClass nc = getNestedClass(info, typeElement);