Non-Functional Inputs

Source

Problem

Some things that affect the software are not under the control of your code or any of the libraries you are using.

Examples

  • Context switching between threads
  • Network errors

Solution

  • Minimize the use of code that relies on these inputs.
  • If possible, put something between you and the external system and inject faults to test the SUT.
From Udacity's Software Testing course Unit I.