public static void main(String[] args) {

    var mammoth = new Mammoth();
    mammoth.observe();
    mammoth.timePasses();
    mammoth.observe();
    mammoth.timePasses();
    mammoth.observe();
  }
@Test
  void shouldExecuteWithoutException() {
    assertDoesNotThrow(() -> App.main(new String[]{}));
  }