InternalCallVerifier BooleanVerifier EqualityVerifier HybridVerifier 

@Test public void testExecuteWithArg() throws Exception {
  final CommandLine cl=new CommandLine(testScript);
  cl.addArgument("BAR");
  final int exitValue=exec.execute(cl);
  assertEquals("FOO..BAR",baos.toString().trim());
  assertFalse(exec.isFailure(exitValue));
}