Chapter 5 / 11 : separate test for initialize().
Chapter 5 / 12
Chapter 5 / 13 : strict order.
Chapter 5 / 13 : output parameter.
Chapter 5 / 13 : reordered tests.
Chapter 5 / 15

(chapter 5 /14 contains no significant changes).
Chapter 5 / 15 : refactor shared_ptr.
Chapter 5 / 15 : ...or like this.
Chapter 5 / 16