Outline:

1. Recap: Defining our own objects
   • self and instance variables
   • example: MultiSidedDie
   • __str__ method
2. Bottom-up implementation
   • unit testing
   • test-driven development: Exercise 1, part a
3. Example: Map class
4. Looking ahead
   • Assignment #7
   • Project Proposal

Explore after class:

5. Test-driven development
   • more types of tests: Exercise 1, parts b-d

Reading assignment (to be completed by the next class):

• Error handling: Zelle section 7.4 (pp. 223-227)
• Bottom-up implementation and unit testing: Zelle section 9.4 (pp. 301-303)
• Defining classes: Zelle sections 10.2-10.5 (pp. 314-336)