MockSimple in = new MockSimple(100, "Hello, world!");
File file = save(f1, Arrays.asList(in));
List<MockSimpleWithLong> results = load(f2, file);
assertThat(results, hasSize(1));
MockSimpleWithLong out = results.get(0);
assertThat(out.number, is(new LongOption()));
assertThat(out.string, is(in.string));
}