@Test
public void getJar() throws Exception
{

  final JarHelper jarHelper = new JarHelper();
  assertNull("System jar is null", jarHelper.getJar(Class.class));
  String jar = jarHelper.getJar(JarHelper.class);
  assertNotNull("JarHelper jar is not null", jar);
  assertSame(jar, jarHelper.getJar(JarHelper.class));
  jar = jarHelper.getJar(JarHelperTest.class);
  assertNotNull("JarHelperTest jar is not null", jar);
  assertSame(jar, jarHelper.getJar(JarHelperTest.class));
}