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Chai
ASecurityChai BDD/TDD assertion library reference for JavaScript testing. Covers expect/should/assert styles, deep equality, type checks, string/array/object matchers, error assertions, chai-as-promised, chai-http for API testing, sinon-chai, and custom assertions.
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- Added September 7, 2026
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[](https://www.skillsdirectory.com/skills/bytesagain-chai)---
name: chai
version: 1.0.0
description: >
Chai BDD/TDD assertion library reference for JavaScript testing.
Covers expect/should/assert styles, deep equality, type checks,
string/array/object matchers, error assertions, chai-as-promised,
chai-http for API testing, sinon-chai, and custom assertions.
author: BytesAgain
homepage: https://bytesagain.com
source: https://github.com/bytesagain/ai-skills
tags: [chai, testing, assertion, bdd, tdd, javascript, mocha]
---
# Chai Reference
BDD/TDD assertion library for JavaScript.
## Commands
| Command | Description |
|---------|-------------|
| `intro` | Overview, styles, plugins |
| `expect` | Expect API, matchers |
| `advanced` | Errors, promises, HTTP, custom |
Files in this skill
- SKILL.md
- scripts/script.sh
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