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#0
Learn Jest - Pre-Requisites Skills & Environment Setup
This opening episode makes sure you have the basic JavaScript skills, an understanding of testing concepts, and the software you need, such as Node.js, a package manager, and an editor. You will also set up a project directory and verify your first Jest installation.
August 10, 2026
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#1
Learn Jest - History, Background & Why to Choose Jest
This episode traces Jest's birth at Facebook, its main advantages such as zero configuration, snapshot testing, and built-in mocking, and provides a thorough comparison with Mocha, Jasmine, Ava, and Vitest to help you choose the right tool.
August 10, 2026
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#2
Learn Jest - Core Concepts & Architecture
This episode dissects Jest's internal architecture: the test runner, assertion library, and mocking engine, plus the test lifecycle from setup, execution, to teardown, as well as the rules for discovering test files and the structure of basic configuration.
August 10, 2026
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#3
Learn Jest - Installation & Basic Configuration
This episode guides you step by step through adding Jest to Node.js and TypeScript projects, writing test scripts in package.json, organizing folder structure and test file naming, and thoroughly understanding Jest's CLI output.
August 10, 2026
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#4
Learn Jest - Writing Unit Tests
This core episode teaches unit test structure: declaring with test and describe, basic matchers such as toBe, toEqual, toContain, and toBeTruthy, the setup teardown lifecycle with beforeEach and friends, and how to test pure functions and edge cases.
August 10, 2026
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#5
Learn Jest - Mocking & Spying
This episode opens up Jest's mocking engine: creating fake functions with jest.fn and jest.spyOn, distinguishing manual mocks from automatic mocks, replacing modules with jest.mock, and controlling implementations and reset behavior.
August 10, 2026
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#6
Learn Jest - Asynchronous Testing
This episode equips you with techniques for testing async code: handling promises with the resolves and rejects matchers, the async/await pattern, done-based callbacks, and controlling time with fake timers so tests are fast and deterministic.
August 10, 2026
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#7
Learn Jest - Snapshot Testing
This episode covers snapshot testing: the concept of comparing serialized output, using toMatchSnapshot, updating snapshots safely through version control, and applying it to React components and serialized output.
August 10, 2026
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#8
Learn Jest - Testing React & UI Components
This episode teaches React component testing: integration with React Testing Library, rendering components and inspecting DOM output, testing events, props, state changes, and async UI, and combining snapshot testing for components.
August 10, 2026
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#9
Learn Jest - TypeScript & Babel Support
This episode covers Jest's support for TypeScript: running tests with ts-jest or Babel, configuring the right transform, mapping module aliases, and testing typed code without sacrificing speed.
August 10, 2026
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