Include value from Exception.stacktrace if available (#30)

Author: mpkorstanje

CHANGELOG.md

@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added 
+- Include value from Exception.stacktrace if available ([#30](https://github.com/cucumber/cucumber-junit-xml-formatter/pull/30), M.P. Korstanje)
+
 ### Fixed
 - Do not overwrite results of retried tests ([#29](https://github.com/cucumber/cucumber-junit-xml-formatter/pull/29), M.P. Korstanje)
 

java/pom.xml

@@ -51,7 +51,7 @@
         <dependency>
             <groupId>io.cucumber</groupId>
             <artifactId>messages</artifactId>
-            <version>[21.0.1,25.0.0)</version>
+            <version>[24.0.0,25.0.0)</version>
         </dependency>
 
         <dependency>

java/src/main/java/io/cucumber/junitxmlformatter/XmlReportWriter.java

@@ -100,8 +100,10 @@ private void writeNonPassedElement(EscapingXmlStreamWriter writer, TestCaseStart
         Optional<String> message = result.getMessage();
         Optional<String> exceptionType = result.getException().map(Exception::getType);
         Optional<String> exceptionMessage = result.getException().flatMap(Exception::getMessage);
+        Optional<String> exceptionStackTrace = result.getException().flatMap(Exception::getStackTrace);
 
-        if (message.isPresent()) {
+        boolean hasMessageOrStackTrace = message.isPresent() || exceptionStackTrace.isPresent();
+        if (hasMessageOrStackTrace) {
             writer.writeStartElement(elementName);
         } else {
             writer.writeEmptyElement(elementName);
@@ -113,13 +115,21 @@ private void writeNonPassedElement(EscapingXmlStreamWriter writer, TestCaseStart
         if (exceptionMessage.isPresent()) {
             writer.writeAttribute("message", exceptionMessage.get());
         }
-        if (message.isPresent()) {
-            writer.newLine();
-            writer.writeCData(message.get());
-            writer.newLine();
+        if (hasMessageOrStackTrace) {
+            if (exceptionStackTrace.isPresent()) {
+                writer.newLine();
+                writer.writeCData(exceptionStackTrace.get());
+                writer.newLine();
+            } else {
+                // Fall back to message for older implementations
+                // that put the stack trace in the message
+                writer.newLine();
+                writer.writeCData(message.get());
+                writer.newLine();
+            }
         }
 
-        if (message.isPresent()) {
+        if (hasMessageOrStackTrace) {
             writer.writeEndElement();
         }
         writer.newLine();