producing robust programs

producing robust programs

1. defensive design

   • protection against unexpected user inputs
     • makes sure it is sensible and reasonable
   • maintainability
     • reducing the chance of introducing coding mistakes/bugs
     • comments
     • indentation
     • formatting
   • minimising/ removing bugs
     • iterative testing
       • test code as you code it
     • final testing
       • to customer
     • test plans made up of
       • the test data
       • the reason for the test
       • the expected outcome
       • the actual result (which is added later- after development)
   • authentication
     • only allow certain users and potentially limiting the access of various parts of the system
     • update their password regularly
     • complex passwords
     • limit login attempts