### Question:
ValidatingArgumentSet implements ArgumentSet { @Override public List<String> getAll() { return argumentSet.getAll(); } ValidatingArgumentSet(ArgumentSet argumentSet); @Override String get(int index); @Override int length(); @Override List<String> getAll(); @Override boolean isEmpty(); @Override boolean has(String argument); @Override String join(); @Override String[] toArray();  }### Answer:
@Test public void getAll() { validatingArguments.getAll(); verify(delegate).getAll(); }