### Question:
WrappingSimpleCollection implements SimpleCollection<E> { @Override public int size() { return delegateCollection.size(); } WrappingSimpleCollection(Collection<E> delegateCollection); @Override int size(); @Override boolean isEmpty(); @Override Iterator<E> iterator(); @Override Iterator<E> structuralIterator(); @Override Stream<E> stream();  }### Answer:
@Test public void size() { assertEquals(3, simpleCollection.size()); }