@Test public void testNumLinkedListSize() { NumLinkedList list = new NumLinkedList(); assertEquals( "Method SIZE should return 0, when list is constructed by default constructor.", 0, list.size()); list.add(1.0); list.add(2.0); list.add(3.0); assertEquals( "Method SIZE should return the size of the list, " + "i.e. the number of elements, in the sequence.", 3, list.size()); }