#jest

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Jest Testing: Unit Test Guide

Metadata Block SEO Title: Jest Testing: Unit Test Complete Guide for 2025 Meta Description: Master Jest unit testing with modern TypeScript patterns, async testing strategies, and production-grade examples for scalable JavaScript applications. Primar...

Feb 129 min read

AKAbish Kamranabishkamran.hashnode.dev

Designing a Scalable UI Automation Setup with Playwright — Part 1: Tech Stack Overview

Introduction Producing and using modern web applications has become increasingly complex. UI changes are common and document-driven processes / workflows are becoming increasingly dynamic due to increased use of automation technology. As part of a pr...

Jan 63 min read

RRicharichak.hashnode.dev

🧪 Complete Jest & React Testing Library Guide

Table of Contents Why Testing Matters Jest Basics Setup & Configuration Writing Your First Test React Testing Library Essentials Real-World Testing Scenarios Mocking in Depth Common Mistakes & Best Practices Interview Questions Testing File...

Jan 432 min read

JHJordan Hindozenchantlive.hashnode.dev

Part 6: Productionization - Tests & Infrastructure

Previously: Solved the hybrid persistence architecture. Dexie for client, Prisma for server, sync between them. Now: Time to build the generation infrastructure and make this production-ready. The Test-First Pivot After two architectural crises (Copi...

Jan 411 min read

TPThisura Pererathisuraperera.hashnode.dev

Integration Testing in React Using Jest and React Testing Library

When a React project grows, components stop living alone. They share data through props, context, routing, and API calls. That’s exactly when we start seeing those “works on my machine” bugs after deployment. The problem is usually not a single compo...

Dec 30, 20255 min read

APAlfredo Perezalfredo-perez.dev

Create Reliable Unit Tests with Claude Code

So you’re using Claude Code to generate tests and it’s creating 45 test files that check if setTimeout works. Yeah, that’s not what we want. And that’s in the best-case scenario. In the worst case? The tests don’t even run. Claude might use Jasmine i...

Dec 27, 202513 min read

SPSaswata Palsaswata.hashnode.dev

Why I Chose Vitest Over Jest: 10x Faster Tests & Native ESM Support

Why I Chose Vitest Over Jest: 10x Faster Tests & Native ESM Support Ever waited 20 seconds for your tests to run, only to realize you made a typo? Yeah, me too. That's why I ditched Jest. After migrating my React component library to Vitest, my tests...

Dec 4, 202521 min read

AGAyush Guptacommunity.keploy.io

Jest Mock: How to Mock a Provider in JavaScript Testing

Whether for frontend or backend, testing is a key aspect of building trustworthy JavaScript applications. For example, when writing code that relies on external modules or services such as APIs, databases, or configuration providers, mocking can allo...

Oct 10, 202513 min read

RPRodolfo Perottonicodingisnotenough.hashnode.dev

Adopting shallow tests in unit tests for cleaner & predictive tests

This article is mostly focused in React Native & @testing-library/react-native. I often recommend individual contributors and their respective teams to adopt shallow testing in their unit tests. The benefits are not clear at first, so I thought I'd ...

Sep 11, 20253 min read

CMCathal Mac Donnachacathalmacdonnacha.com

Fixing Slow & Flaky Frontend Tests

After noticing a spike in failing Jest builds, I decided to investigate and found that slow and flaky tests were the main culprits. In this article, I go through some tips I discovered for making slow or flaky tests faster and more reliable. There ar...

Sep 8, 202510 min read

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#jest

Jest Testing: Unit Test Guide

Designing a Scalable UI Automation Setup with Playwright — Part 1: Tech Stack Overview

🧪 Complete Jest & React Testing Library Guide

Part 6: Productionization - Tests & Infrastructure

Integration Testing in React Using Jest and React Testing Library

Create Reliable Unit Tests with Claude Code

Why I Chose Vitest Over Jest: 10x Faster Tests & Native ESM Support

Jest Mock: How to Mock a Provider in JavaScript Testing

Adopting shallow tests in unit tests for cleaner & predictive tests

Fixing Slow & Flaky Frontend Tests

#jest

Search Hashnode

#jest

Jest Testing: Unit Test Guide

Designing a Scalable UI Automation Setup with Playwright — Part 1: Tech Stack Overview

🧪 Complete Jest & React Testing Library Guide

Part 6: Productionization - Tests & Infrastructure

Integration Testing in React Using Jest and React Testing Library

Create Reliable Unit Tests with Claude Code

Why I Chose Vitest Over Jest: 10x Faster Tests & Native ESM Support

Jest Mock: How to Mock a Provider in JavaScript Testing

Adopting shallow tests in unit tests for cleaner & predictive tests

Fixing Slow & Flaky Frontend Tests