Ensure xdocs correctly generated with relative xml entities

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@114101 13f79535-47bb-0310-9956-ffa450edef68

xdoc/src/plugin-test/maven.xml

@@ -6,6 +6,13 @@
   </goal>
   
   <goal name="test-xdoc">
-    <!--<attainGoal name="xdoc"/>-->
+    <attainGoal name="xdoc"/>
+
+    <j:set var="expectedFile" 
+      value="${maven.docs.dest}/test.html"/>
+    <util:file var="file" name="${expectedFile}" />
+    <j:if test="${!(file.exists())}">
+      <fail>${expectedFile} not generated</fail>
+    </j:if>
   </goal>
 </project>