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20. Unit Testing

• 20.1. Introduction: Unit Testing
• 20.2. Checking Assumptions With assert
  • 20.2.1. Designing Defensive Functions
  • 20.2.2. The assert Statement
  • 20.2.3. More on assert and Preconditions
• 20.3. Testing Functions
  • 20.3.1. Automated Unit Tests
  • 20.3.2. Automated Unit Tests with assert
  • 20.3.3. Unit Tests can have bugs
• 20.4. Designing Testable Functions
  • 20.4.1. Design by Contract
• 20.5. Writing Unit Tests
  • 20.5.1. Specification-Based Testing
• 20.6. Test-First Development
  • 20.6.1. Benefits of Test-First Development
• 20.7. Testing with pytest
  • 20.7.1. Organizing pytest Functions
  • 20.7.2. Using pytest
  • 20.7.3. Understanding pytest Failure Reports
  • 20.7.4. Integrated Unit Testing with pytest
• 20.8. Glossary
• 20.9. Exercises

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