### Question:
ObservableBuffer extends ObservableListBase<E> implements Queue<E> { @Override public E peek() { return myQueue.peekLast(); } ObservableBuffer(final int capacity); @Override boolean offer(final E element); @Override boolean add(final E e); @Override E remove(); @Override E poll(); @Override E element(); @Override E peek(); @Override E get(final int index); @Override int size(); @Override void clear();  }### Answer:
@Test public void testPeekEmpty() { assertNull(myObservableBuffer.peek()); }