Series

Testing for Confidence

Choosing evidence, boundaries, doubles, contracts, and mutations that can expose the defects that matter.

  1. Coverage Tells You What Ran, Not What Your Tests Would Catch
  2. Choose the Test Boundary from the Defect
  1. A Mock Fortress Tests a Call Script
  2. An Interface Does Not Make a Fake Substitutable
  3. A Surviving Mutant Is a Question, Not a Score
  4. A Characterization Test Is a Boundary, Not a Recording
  5. A Design Is Good for a Change, Not in Isolation