### Question:
PrimitiveLongList implements PrimitiveLongCollection { @Override public boolean isEmpty() { return size == 0; } PrimitiveLongList();   PrimitiveLongList( int size ); void add( long element ); long get( int position ); @Override boolean isEmpty(); @Override void clear(); @Override int size(); @Override void close(); @Override PrimitiveLongIterator iterator(); @Override void visitKeys( PrimitiveLongVisitor<E> visitor ); long[] toArray();  }### Answer:
@Test void newListIsEmpty() { assertTrue( new PrimitiveLongList().isEmpty() ); assertTrue( new PrimitiveLongList( 12 ).isEmpty() ); }