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## Test-Driven Development (TDD)
#### Summary for node.js development
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### Introduction to TDD
Importance of Testing in Web Development
Overview of Testing Types: Unit, Integration, End-to-End
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### Unit Testing
Definition: Testing individual components or pieces of code in isolation.
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Key Points:
* Tests the smallest parts of an application
* Ensures that each unit works as intended
* Often done by developers
* Examples: Functions, methods, classes.
Tools & Frameworks: Mocha, Jest (for Node.js)
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### Integration Testing
Definition: Testing combined units or modules to ensure they work together.
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Key Points:
* Bridges the gap between unit testing and end-to-end testing.
* Tests the interaction between integrated units.
* Helps identify issues in the interfaces and interaction between modules.
*
Tools & Frameworks: Supertest, Chai (for Node.js)
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### End-to-End Testing
Definition: Testing the complete flow of an application from start to finish.
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Key Points:
* Mimics real user scenarios and interactions.
* Tests the application in its entirety.
* Validates the integrated components in a real-world scenario.
Tools & Frameworks: Cypress, Selenium
---
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