### Question:
LinkedListIndexedCollection extends Collection { @Override public boolean contains(Object value) { return indexOf(value) != VALUE_NOT_FOUND_RETURN_VALUE; } LinkedListIndexedCollection();  LinkedListIndexedCollection(Collection other); @Override int size(); @Override boolean contains(Object value); @Override boolean remove(Object value); @Override Object[] toArray(); @Override void forEach(Processor processor); @Override void add(Object value); Object get(int index); @Override void clear(); void insert(Object value, int position); int indexOf(Object value); void remove(int index); @Override String toString(); static final int VALUE_NOT_FOUND_RETURN_VALUE; }### Answer:
@Test void testContainsWithEmptyCollection() { assertFalse(createCollectionWithNElements(0).contains(new Object())); }
@Test void testContainsWithNull() { assertFalse(createCollectionWithNElements(5).contains(null)); }