The rise of object-oriented (00) software development seems to have helped improve software quality, but it has not, of course, eliminated all possibility of error. Thus, software testing is at least as important today as it ever has been. Testing, as a centerpiece of quality assurance efforts, only increases in value as society becomes more and more reliant on software. Testing 00 components and even 00 systems is not very difficult once you know how to do it. But until now there have been few accounts of how to do it well and none that adequately characterize testing across the life cycle...