From ea25a561c57cba63c5581aefa21f92ffd7386244 Mon Sep 17 00:00:00 2001
From: Matthias Baesken <mbaesken@openjdk.org>
Date: Tue, 3 Jan 2023 15:26:10 +0000
Subject: [PATCH] 8299520: TestPrintXML.java output error messages in case
 compare fails

Reviewed-by: mgronlun
---
 test/jdk/jdk/jfr/tool/TestPrintXML.java | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/test/jdk/jdk/jfr/tool/TestPrintXML.java b/test/jdk/jdk/jfr/tool/TestPrintXML.java
index d32dc3236ae..c8d60166d4c 100644
--- a/test/jdk/jdk/jfr/tool/TestPrintXML.java
+++ b/test/jdk/jdk/jfr/tool/TestPrintXML.java
@@ -132,6 +132,8 @@ public class TestPrintXML {
             Map<String, Object> xmlMap = (Map<String, Object>) xmlObject;
             List<ValueDescriptor> fields = re.getFields();
             if (fields.size() != xmlMap.size()) {
+                System.err.println("Size of fields of recorded object (" + fields.size() +
+                                   ") and reference (" + xmlMap.size() + ") differ");
                 return false;
             }
             for (ValueDescriptor v : fields) {
@@ -154,6 +156,7 @@ public class TestPrintXML {
                     expectedValue = Long.toUnsignedString(re.getLong(name));
                 }
                 if (!compare(expectedValue, xmlValue)) {
+                    System.err.println("Expcted value " + expectedValue + " differs from " + xmlValue);
                     return false;
                 }
             }
@@ -163,10 +166,14 @@ public class TestPrintXML {
             Object[] array = (Object[]) eventObject;
             Object[] xmlArray = (Object[]) xmlObject;
             if (array.length != xmlArray.length) {
+                System.err.println("Array length " + array.length + " differs from length " +
+                                   xmlArray.length);
                 return false;
             }
             for (int i = 0; i < array.length; i++) {
                 if (!compare(array[i], xmlArray[i])) {
+                    System.err.println("Array element " + i + "(" + array[i] +
+                                       ") differs from element " + xmlArray[i]);
                     return false;
                 }
             }
@@ -174,7 +181,11 @@ public class TestPrintXML {
         }
         String s1 = String.valueOf(eventObject);
         String s2 = (String) xmlObject;
-        return s1.equals(s2);
+        boolean res = s1.equals(s2);
+        if (! res) {
+            System.err.println("Event object string " + s1 + " differs from " + s2);
+        }
+        return res;
     }
 
     static class XMLEvent {