Module 07: Testing Fundamentals
Duration: 2-3 hours | Difficulty: Beginner
Before writing tests, you need to understand why testing matters, what types of tests exist, and how to balance your testing strategy.
What You'll Learn
- Why testing is essential for professional software
- The testing pyramid and optimal test distribution
- Different types of tests and when to use each
- Test anatomy and best practices
- How SpecWeave integrates testing into development
The Testing Reality
Without Tests
Day 1: "It works on my machine!"
Day 30: "Who broke the login?"
Day 60: "I'm afraid to touch this code"
Day 90: "Let's rewrite everything"
With Tests
Day 1: "All 50 tests pass ✓"
Day 30: "Tests caught the regression before deploy"
Day 60: "Safe to refactor - tests verify behavior"
Day 90: "Confident to add features - tests protect us"
Module Lessons
| Lesson | Topic | Duration |
|---|---|---|
| 07.1 Why Testing Matters | The cost of bugs, benefits of testing | 30 min |
| 07.2 The Testing Pyramid | Unit, integration, E2E distribution | 45 min |
| 07.3 Test Anatomy | Structure of a good test | 45 min |
| 07.4 Testing with SpecWeave | BDD scenarios, quality gates | 45 min |
Key Concept: The Testing Pyramid
/\ E2E Tests (10%)
/ \ - Slow, expensive
/----\ - Test complete workflows
/ \
/ Integ \ Integration Tests (20%)
/ 20% \ - Test component interaction
/------------\ - Moderate speed
/ \
/ Unit 70% \ Unit Tests (70%)
/ \ - Fast, cheap
-------------------- - Test isolated functions
Follow this pyramid for a balanced, maintainable test suite.
Prerequisites
Before starting:
- ✅ Completed Parts 1-2
- ✅ Built a project with SpecWeave
- ✅ Comfortable with JavaScript functions
Let's Begin
Ready to understand why testing transforms software quality?