---
title: "TDD & Unit Testing in Modern JavaScript workshop"
url: "https://www.artofunittesting.com/tdd-in-js.md"
canonical: "https://www.artofunittesting.com/tdd-in-js"
tags: []
author: "Roy Osherove"
description: "The Art of Unit Testing, 3rd Edition, by Roy Osherove (Manning): readable, maintainable, trustworthy unit tests. Plus hands-on TDD workshops in C#, JavaScript, Java and Kotlin."
usage: "Licensed under CC BY 4.0 — reuse, quote and adapt with attribution (Roy Osherove, link to the original page)."
license: "https://creativecommons.org/licenses/by/4.0/"
---

# TDD & Unit Testing in Modern JavaScript workshop

Hands-on workshop · 3 days · with Roy Osherove

# The Art of Unit Testing & TDD in Modern JavaScript

 ![](https://www.artofunittesting.com/img/c/js.png)

[Book training](https://forms.gle/jQSx5KoXvrVA1JCK7)[Other languages](https://www.artofunittesting.com/languages)

## The Problem

Unit testing, done badly, can hurt your project more than it helps. In some cases, it may lead to project schedule delays, and unhappy developers due to huge maintenance problems. But when unit testing is done right, it can help the project and developers’ confidence immensely. The challenge is - how do you do it in a way that is helping, rather than hurting your project?

## Objective

**Specifically designed for the new age of modern JavaScript in 2020**, In this coding-packed training workshop we will learn essential test driven skills and techniques for writing unit tests in a readable, maintainable and trustworthy fashion, so that we can feel more confident in our code, make it simpler, and save ourselves time in debugging and maintaining our code base. we will also look at some code design issues that hurt testability.

1. Learn how to write readable, maintainable, trustworthy unit tests using Javascript and node.js,
2. Learn how to refactor code, and SOLID design concepts.
3. Learn the principles of Test Driven Development, and develop new features using TDD.
4. Learn how to Pair Program, and experience it throughout the course
5. Learn about mocks, stubs, spies & fakes, and the difference between them
6. Learn about testing frameworks such as jest and Jasmine, and isolation (mocking) frameworks like sinon & jest mocks.

## Pre-Requisites

- The course will benefit both backend (node.js) developers and frontend (Angular, React, Vue etc..) developers with at least a year’s experience developing with [JavaScript ES2015 syntax knowledge](https://github.com/lukehoban/es6features#readme)
- No knowledge of typescript is required, but drills can be executed in typescript if you find it useful.
- VS Code, IntelliJ, Webstorm or other JS enabled IDEs with JavaScript or Typescript enabled plugins
- JS [ES2015 syntax](https://github.com/lukehoban/es6features#readme) knowledge

## Agenda

### Day 1: Beginnings (09:00-16:00)

1. Units, entry points & exit points.
2. The first unit test & a continuous testing environment
3. Jest basics & Drills
4. Writing readable, maintainable tests
5. Test Driven Development Introduction
6. String Calculator,Password Verifier Kata Drills
7. Value based, State Based and Interaction Based Tests
8. Drills

### Day 2: Mocks & Stubs (09:00-16:00)

1. Understanding Fakes, Spies Mocks and Stubs
2. Hand Written Fakes, Stubs and Mocks
3. Faking Time & Drills
4. Faking other dependencies & Drills
5. Jest.fn, jest.spyOn and other creatures
6. Drills, Drills, Drills

### Day 3: Diving Deeper (09:00-16:00)

1. Async in Tests & Drills
2. Legacy Refactorings
3. Faking whole modules & Drills
4. Unit Testing Good Practices
5. Code Review Drills

## Bring this workshop to your team

Send Roy a message with your team size, dates and location (or remote).

[Book training](https://forms.gle/jQSx5KoXvrVA1JCK7)


---

## About the author

**Roy Osherove**: Senior Solutions Architect at AWS working on AI for production and AI-driven development; author of The Art of Unit Testing and Elastic Leadership, with about 20 years of consulting and training on unit testing, TDD, team leadership and continuous delivery.

### Sites

- [RobotPaper](https://robotpaper.ai/): This blog: AI patterns and anti-patterns, AI and coding agents, and engineering leadership.
- [osherove.com](https://osherove.com): Roy's personal site. Author of The Art of Unit Testing and Elastic Leadership; consulting and training on unit testing, TDD, team leadership and continuous delivery, plus about 20 years of blog posts.
- [The Art of Unit Testing](https://www.artofunittesting.com): The Art of Unit Testing, 3rd Edition (Manning): readable, maintainable, trustworthy unit tests, plus TDD workshops in C#, JavaScript, Java and Kotlin.
- [5whys.com](https://www.5whys.com): Roy's writing on software team leadership: self-organizing teams, surviving chaos, learning mode and the Elastic Leadership model.
- [Pipeline Driven](https://pipelinedriven.org): Continuous delivery and DevOps practices: build patterns, pipeline-friendly testing, DevOps metrics and enterprise DevOps.
- [Elastic Leadership](https://www.elasticleadership.com): Elastic Leadership, Roy's framework for software team leaders (survival, learning and self-organizing modes).

### Social

- X: https://x.com/royosherove
- LinkedIn: https://www.linkedin.com/in/osherove/

### Contact

- Contact form: https://forms.gle/jQSx5KoXvrVA1JCK7

### License

Licensed under CC BY 4.0 — reuse, quote and adapt with attribution (Roy Osherove, link to the original page). License: https://creativecommons.org/licenses/by/4.0/