use isfileselected in test instead of the pathconvert hack

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277089 13f79535-47bb-0310-9956-ffa450edef68

src/etc/testcases/taskdefs/signjar.xml

@@ -37,22 +37,13 @@
     <touch file="signtest.jar" datetime="06/28/2000 2:02 pm"/>
     <signjar jar="signtest.jar" alias="testonly" keystore="testkeystore" storepass="apacheant" 
     	preservelastmodified="true"/>
-    <!-- Currently there is no condition for testing the date of file - so
-         use a selector -->
-    <pathconvert property="signtest.jar.prop" targetos="unix">
-      <path>
-        <fileset dir="." includes="signtest.jar">
-          <date datetime="06/28/2000 2:02 pm" when="equal"/>
-        </fileset>
-      </path>
-      <mapper>
-        <flattenmapper/>
-      </mapper>
-    </pathconvert>
+
     <fail message="preserveLastModified did not preserve the last modified time">
       <condition>
         <not>
-          <equals arg1="signtest.jar" arg2="signtest.jar"/>
+          <isfileselected file="signtest.jar">
+            <date datetime="06/28/2000 2:02 pm" when="equal"/>
+          </isfileselected>
         </not>
       </condition>
     </fail>