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Unit tests with Jest v1.0.0

Use this resource to write focused Jest unit tests for business logic

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  • 337 downloads
  • 116 likes
  • 190 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install jest-unit-tests-rule

First time: connect the CLI with

npx --yes palatekit@latest login

Cursor checks whether the project uses TypeScript, then writes Jest tests for business logic and utility functions: dependencies mocked before imports, valid, invalid and edge-case inputs, grouped in describe blocks. It caps the number of tests per file.

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Updated November 2, 2026

Card for “Unit tests with Jest”

Details

Works in
Install guides
Generates with
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Licence
CC0-1.0

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What you get

  • The .mdc file (in English): testing guidance, a mock example and naming conventions
  • A reminder to limit tests to critical cases

Good fit for

  • A pricing function that needs safeguarding
  • A TypeScript project with no tests yet

Not for

    Tags

    • jest
    • unit tests
    • typescript

    About

    You say

    “Write unit tests for this VAT calculation function.”

    Card for “Unit tests with Jest”

    Rule published by PatrickJS under the CC0-1.0 license, delivered in its original version.

    Show more

    How to use it

    1. Copy the .mdc file into your project's .cursor/rules/ folder
    2. Ask Cursor to write focused Jest unit tests for business logic
    3. Adjust the rule to your conventions

    Content preview

    Files

    • jest-unit-tests-rule.mdc3.9 KB
    • LICENSE6.5 KB
    • NOTICE-PALATEKIT.md0.5 KB

    Origin and licence

    Listed unmodified

    Author
    PatrickJS
    Source
    github.com/PatrickJS/awesome-cursorrules/blob/b044f956f021b6e8877f16781bcfc466a6a120e9/rules/jest-unit-testing-cursorrules-prompt-file.mdc
    Licence
    CC0-1.0

    Notice

    « jest-unit-testing-cursorrules-prompt-file » (PatrickJS, CC0-1.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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