The simplest test is an ordinary Java program with the usual static main method. If the test fails, it should throw an exception; if it succeeds, it should return normally.
Here's an example:
/* @test 1.1 97/10/12
@bug 1234567
@summary Make sure that 1 != 0
*/
public class OneZero {
public static void main(String[] args) throws Exception {
if (1 == 0) {
throw new Exception("1 == 0");
}
}
}
This test could be run on its own with the command
<build>/bin/java OneZero