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Foundations of TDD in TypeScript and Jest: The Principles

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Overview

This course introduces Test-Driven Development (TDD) for TypeScript projects, covering the Red-Green-Refactor workflow, TDD mindset, and setup with Jest. Learn best practices like SOLID principles and dependency injection, and explore TDD's impact on code quality and speed compared to traditional approaches.

Syllabus

Unit 1: Introduction to TDD: What, Why, and How

Write a Test, Watch It Fail
Make the Test Pass
Refactor for Readability and Clarity

Unit 2: Generalizing Solutions with Test Driven Development

Write another failing test
Make it pass again
Refactor to use parameterized tests

Unit 3: The TDD Mindset: Thinking in Tests

Defining the first test for Shopping Cart totals
Make it pass
Write another failing test
Make the Cart Total Function Work
Refactor Your Cart Total Function
Make it Red
Make it Green
Refactor!

Unit 4: Setting Up and Mastering Testing in TypeScript with Jest

Understanding Jest
Use some matchers
Manage repetitive setup with beforeEach
Group tests with nested describe() blocks
Expect an exception
Write an async test

Unit 5: Managing Dependencies in TDD with TypeScript

Write your first failing test
Make it pass
Refactor
Write a test that expects logging (Red)
Make the tests pass
Refactor the UserManager Class

Unit 6: AAA Pattern in TDD with TypeScript

Refactor Tests with AAA Pattern

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