quartz/content/notes/testing.md

title	tags
testing	cosc202

testing

• most software will contain bugs
• bug severity if not always equivalent to bug priority
• testing is seeking out bugs
• some test types
  • unit tests
  • integration tests ⇒ check units work together
  • end-to-end tests ⇒ check behaviour of whole program

1 Limitations

• testing every code path is impossible

  • halting problem - cant fully analyse code using code
  • proved by alan turing in 1936

• good test design focuses on key cases to pass and fail

• not probe interaction between units

  • this should be done by integration testing

• testing may afffect behaviour of code

  • testing framework may affect the order of esecution
  • testing framework may change execution speed