Module 17: Testing

MODULE 17 · 3 LESSONS

Build a fast confidence pyramid across units, integrations, components and critical user journeys.

Project checkpoint: Create a CI-ready test suite for CourseFlow's enrollment path.

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Module 17 learning loopA four-step visual showing test pyramid, arrange act assert, test doubles, database isolation.Module 17 learning loop1Test Pyramid2Arrange Act Assert3Test Doubles4Database Isolation

Module 17 learning loop

  1. 1Test Pyramid
  2. 2Arrange Act Assert
  3. 3Test Doubles
  4. 4Database Isolation
Module 17 learning loop: a practical sequence used in this lesson.

What this module changes in your work

  • Test behavior at the smallest useful boundary and integrate real dependencies where risk justifies it.
  • Protect a few revenue- or mission-critical journeys in real browsers without making CI brittle.
  • Use test pyramid, arrange act assert, test doubles in one coherent implementation.
  • Complete this evidence-backed checkpoint: Create a CI-ready test suite for CourseFlow's enrollment path.

Lessons

PROJECT CHECKPOINT

Turn testing into evidence

Create a CI-ready test suite for CourseFlow's enrollment path.

  • Write acceptance criteria for test pyramid before implementation.
  • Keep the change small enough that a reviewer can connect it to the intended behavior.
  • Use the most direct check available for arrange act assert and save the result.
  • Record one decision you would keep and one you would revisit after feedback.

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