@Test
void concatIterators()
{
CountingResource resource = new CountingResource();
PrimitiveLongResourceIterator first = PrimitiveLongResourceCollections.iterator( resource, 1, 2 );
PrimitiveLongResourceIterator second = PrimitiveLongResourceCollections.iterator( resource, 3, 4 );
PrimitiveLongResourceIterator concat = PrimitiveLongResourceCollections.concat( first, second );
assertContent( concat, 1, 2, 3, 4 );
concat.close();
assertEquals( 2, resource.closeCount(), "all concatenated iterators are closed" );
}