@Test
public void testJar() throws IOException {

  File file = new File(TEST_DIR, "classpath.jar");
  Classpath.main(new String[] { "--jar", file.getAbsolutePath() });
  assertTrue(stdout.toByteArray().length == 0);
  assertTrue(stderr.toByteArray().length == 0);
  assertTrue(file.exists());
  assertJar(file);
}