Day 1: Introduction to Test-Driven Development (TDD) and Unit Testing

Session 1: Understanding Test-Driven Development (TDD)

• What is TDD, and why is it important?
• Differences between unit tests, integration tests, and functional tests
• TDD workflow: Red-Green-Refactor

Session 2: Writing Unit Tests for Backend Applications

• Setting up a testing environment for Node.js (Jest), Python (Pytest/Unittest), or Ruby (RSpec)
• Writing test cases for functions, models, and controllers
• Using assertions and test matchers effectively

Session 3: Hands-on Lab – Writing Unit Tests for a Simple Backend Application

• Setting up a test suite in Node.js, Django, Flask, or Ruby on Rails
• Writing basic unit tests for data models and functions

Day 2: Mocking, Stubbing, and Integration Testing

Session 1: Mocking and Stubbing for Isolated Testing

• What is mocking, and why is it used in testing?
• Using mock objects, fakes, and spies to isolate dependencies
• Implementing mocking frameworks (e.g., Jest, unittest.mock, RSpec Mocks)

Session 2: Integration Testing for APIs and Databases

• Testing API endpoints using Supertest (Node.js), Django TestClient, or Flask-Testing
• Validating database transactions using in-memory databases (SQLite, MockDB, or PostgreSQL)
• Implementing test data factories and fixtures

Session 3: Hands-on Lab – Writing Mocked Unit Tests and Integration Tests

• Creating mocked services and testing API interactions
• Implementing end-to-end integration tests for a backend application

Day 3: Continuous Testing, CI/CD, and Performance Testing

Session 1: Automating Tests with CI/CD Pipelines

• Setting up GitHub Actions, GitLab CI/CD, or Jenkins for automated testing
• Running tests before deployment in a CI/CD workflow
• Handling test failures and rollback strategies

Session 2: Load and Performance Testing for Backend APIs

• Using tools like Locust, k6, or JMeter for performance testing
• Measuring API response times and optimizing slow endpoints
• Implementing stress testing for high-traffic scenarios

Session 3: Hands-on Lab – Setting Up CI/CD Pipelines and Running Performance Tests

• Integrating automated tests into a CI/CD pipeline
• Running performance benchmarks on backend APIs

Day 4: Debugging, Refactoring, and Best Practices in TDD

Session 1: Debugging and Fixing Failing Tests

• Understanding test reports and failure logs
• Debugging common issues in test-driven applications
• Refactoring code based on test results

Session 2: Best Practices for TDD in Backend Development

• Writing clean and maintainable test cases
• Organizing test files and project structures
• Following best practices for backend TDD in large applications

Session 3: Hands-on Lab – Debugging and Improving Test Coverage

• Fixing failing tests and improving test reliability
• Increasing test coverage with functional and regression tests