This question is from book "Introduction to Software Testing(edition 2)" by Ammann and Offutt. It is taken from Chapter 6, Section 6.4 exercise 2 of the book.

Question is:

(Challenging!) It is possible to modify an ArrayList without using the remove() method and yet have a subsequent call to remove() fail to throw ConcurrentModificationException. Develop a (failing!) JUnit test that exhibits this behavior.