You can simply install Eclipse and use it just for Ant! If you install Eclipse - then it has Ant built in:
Eclipse - built in:
Unit Test Framework for Ant Tasks AntUnit borrows ideas from JUnit 3.x and the <junit> task. It provides a task that runs build files as unit tests as well as a number of assertion tasks to support the idea.
Also see Additional Ant Tasks for FTP, Email, etc.
My Triangle ColdFusion User Group Ant Presentation
My ColdFusion Meetup Introduction To Ant Presentation