---
title: "JavaScript Testing Patterns - Air Market"
description: "You have JavaScript or TypeScript code and no real tests behind it, or a test setup nobody wants to touch. This helps you write the tests, stand up the tooling, and stub out the parts you don't want…"
canonical: "https://airmarket.ai/app/javascript-testing-patterns"
---

[Air Market](/) / [Developer Tools](/category/devtools) / JavaScript Testing Patterns

Skill by [Seth Hobson](/@wshobson)

# JavaScript Testing Patterns

Get your JavaScript covered by tests you can trust

## What this does

You have JavaScript or TypeScript code and no real tests behind it, or a test setup nobody wants to touch. This helps you write the tests, stand up the tooling, and stub out the parts you don't want to call for real. Reach for it when you're adding tests, starting a project's test setup, or writing tests before the code.

### Top 3 things it does for you

- Write unit tests for a component
- Set up a test suite from scratch
- Mock out a dependency

## Information

**JavaScript Testing Patterns at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Seth Hobson](/@wshobson) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 27 KB |
| Licence | MIT |
| Repository | [wshobson/agents](https://github.com/wshobson/agents/tree/ece811f23310a37ceb43496dbac0e244fe6845b6/plugins/javascript-typescript/skills/javascript-testing-patterns) |
| GitHub stars | 39,077 (as of Nov 2026) |
| Installs | 21,161, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of JavaScript Testing Patterns and recorded 0 findings and 2 flagged items. AIR's verdict: **safe**.

**What JavaScript Testing Patterns's check was run against**

|  |  |
| --- | --- |
| Commit | ece811f23310a37ceb43496dbac0e244fe6845b6 |
| Content hash | 45dc519b71c4e2d60ca7c089bbe83d94c8ba16ae8b8b7e32114639e9c1fe517b |
| Files read | [Browse the files at this exact commit](https://github.com/wshobson/agents/blob/ece811f23310a37ceb43496dbac0e244fe6845b6/plugins/javascript-typescript/skills/javascript-testing-patterns/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for JavaScript Testing Patterns](/security/javascript-testing-patterns)

## About JavaScript Testing Patterns

Covers testing JavaScript and TypeScript at every level: unit tests, integration tests, and end-to-end tests, using Jest, Vitest, and Testing Library.

It also handles the scaffolding around the tests - mocking, fixtures, and the test infrastructure itself - and supports test-driven and behavior-driven workflows where the test comes first.

## What's inside

- SKILL.md - instructions
- references/advanced-testing-patterns.md - reference

## Questions

### Is JavaScript Testing Patterns safe to install?

AIR scanned this exact version of JavaScript Testing Patterns and recorded 0 findings and 2 flagged items. AIR's verdict: safe. The verdict is named by the content that was read, at commit ece811f23310, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/javascript-testing-patterns.

### How do I install JavaScript Testing Patterns?

Open https://airmarket.ai/app/javascript-testing-patterns on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/wshobson/agents/tree/ece811f23310a37ceb43496dbac0e244fe6845b6/plugins/javascript-typescript/skills/javascript-testing-patterns. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Seth Hobson](/@wshobson)

---

Canonical URL: <https://airmarket.ai/app/javascript-testing-patterns>