Passing AntUnit test for PR 54967

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1482674 13f79535-47bb-0310-9956-ffa450edef68

src/tests/antunit/taskdefs/zip-test.xml

@@ -169,4 +169,17 @@
       <unzip src="${output}/test.zip" dest="${output}/expand"/>
       <au:assertFileExists file="${output}/expand/test1.txt"/>
     </target>
+
+    <target name="testUpdateZipWithDuplicateEntries"
+            description="https://issues.apache.org/bugzilla/show_bug.cgi?id=54967">
+      <mkdir dir="${input}/"/>
+      <touch file="${input}/test1.txt"/>
+      <mkdir dir="${output}"/>
+      <zip destfile="${output}/test.zip" basedir="${input}">
+        <fileset dir="${input}"/>                                          
+      </zip>                                                                  
+      <zip destfile="${output}/test.zip" update="true">
+        <fileset dir="${basedir}" includes="build.xml"/>                    
+      </zip>
+    </target>
 </project>