### Question:
TwoDigitYearLocalDateConverter implements Converter<LocalDate, LocalDate> { @CheckForNull @Override public Result<LocalDate> convertToModel(@CheckForNull LocalDate value, ValueContext context) { if (value == null) { return Result.ok(null); } else { return Result.ok(TwoDigitYearUtil.convert(value)); } }  @CheckForNull @Override Result<LocalDate> convertToModel(@CheckForNull LocalDate value, ValueContext context); @Override LocalDate convertToPresentation(LocalDate value, ValueContext context);  }### Answer:
@Test public void testConvertToModel_FourDigitYear_NoConversion() { assertThat((converter.convertToModel(LocalDate.of(2039, 12, 31), context)) .getOrThrow(s -> new AssertionError(s)), is(LocalDate.of(2039, 12, 31))); }
@Test public void testConvertToModel_NullValue() { assertNull((converter.convertToModel(null, context)) .getOrThrow(s -> new AssertionError(s))); }
@Test public void testConvertToModel_MaxTwoDigitYear() { LocalDate date = LocalDate.of(39, 12, 31); assertThat((converter.convertToModel(date, context)) .getOrThrow(s -> new AssertionError(s)), is(TwoDigitYearUtil.convert(date))); }