.addEqualityGroup(Optional.of(Long.valueOf(42)), reserialize(Optional.of(Long.valueOf(42))))
        .testEquals();
  }

  public void testToString_absent() {
    assertEquals("Optional.absent()", Optional.absent().toString());
  }

  public void testToString_present() {
    assertEquals("Optional.of(training)", Optional.of("training").toString());
  }