@Test 
public void testUnmarshallFileWithValidation() {

  try {
    Parameters p = Parameters.unmarshall(new File(ParametersTest.class.getClassLoader().getResource("simple.xml").getPath()), PARAMETERS_SCHEMA);
    assertEquals(p.get("A").toString(), "B");
    assertEquals(p.get("C").toString(), "D");
  } catch(Exception e) {
    fail();
  }
}