JUnit.org Resources for Test Driven Development

Hi,
I have a properties file which has initialised many variables as constants there.It has no method.Now since this file is huge i want to split this file according to the functionalities in which they are used.am trying to create junit test for this file..But since there is no method in my source file..I have wrote test cases in main method..While running RAD is throwing error as no tests found

public class PropsTest extends TestCase {
private final Props uut = new Props();
private static String fldName = null;
private static String fldVal = null;
public static void main(String args[]) {

// get all fields from props
Field fieldlist[] = Props.class.getDeclaredFields();

}
}