Robust Programs

Robust Programs

1. Software

   • Software must be maintainable; able to be updated after release and must be easy to understand, using comments & indents.
   • There are 2 types of test; Iterative (as you go) and Terminal (final).
     • Iterative happens during development, making it easier to debug programs.
     • Terminal happens at the end of the development cycle. It is a designed test that often tests every module in every way (Normal, Extreme & Erroneous).

2. Test Data

   • There are 3 types of Test Data. Normal, Extreme and Erroneous.
     • Normal; correct data. For example, in a range of 1 to 5, 3.
     • Extreme; correct data bordering the range of acceptability. For example, in a range of 1 to 5, 1 or 5.
     • Erroneous; incorrect data. For example, in a range of 1 to 5, 0 or 6.

3. Errors

   • There are 3 types of Error. Runtime, Syntax & Logic.
     • Runtime;

4. Data Validation/Verification

   • Data Validation; checks data is sensible rather than correct. For example, in range.
   • Data Verification; checks data is accurate. For example, presence checks or confirmation.