### Question:
DefaultValueOnErrorDecorator extends AbstractDecoratorCommand<R> implements CanonCommand<R> { @Override public Optional<R> getOpt() { try { return getDelegate().getOpt(); } catch (Exception e) { return Optional.ofNullable(defaultValue); } } DefaultValueOnErrorDecorator(final CanonCommand<R> delegate);  DefaultValueOnErrorDecorator(final CanonCommand<R> delegate, final R defaultValue);  DefaultValueOnErrorDecorator(final FakeClassArgument fake, final DefaultValueOnErrorDecorator<R> toCopy); @Override R get(); @Override Optional<R> getOpt();  }### Answer:
@Test void getOpt() { final DefaultValueOnErrorDecorator<String> decorator = new DefaultValueOnErrorDecorator<>(command); decorator.run(); Assertions.assertTrue(decorator.getOpt().isPresent()); Assertions.assertEquals("value", decorator.getOpt().get()); }