<project name="testCondition">    <target name="test">        <condition property="condition">            <istrue value="true"/>                            </condition>        <antcall target="isTrue"></antcall>        <antcall target="isFalse"></antcall>            </target>    <target name="isTrue" if="condition">        <echo>is ture</echo>    </target>    <target name="isFalse" unless="condition">        <echo>is false</echo>    </target></project>