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Testing an Effect app with layers v1.0.0

Use this resource to test an Effect application with mock layers

New

  • 345 downloads
  • 221 likes
  • 110 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install effect-testing-mock-layers

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent writes the tests of an Effect application: Effect.gen in tests, test layers (mocked, stateful or spies) and expected-error or recovery scenarios. You get unit and integration tests for your services.

Mostly picked by

Updated November 2, 2026

Card for the “Testing an Effect app with layers” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
Apache-2.0

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What you get

  • SKILL.md: tests with Effect.gen, success and failure cases
  • SKILL.md: mock layers, spy layers and error tests

Good fit for

  • Your Effect services depend on an external API that is hard to call in tests
  • You want to verify recovery after an error

Not for

    Tags

    • effect
    • testing
    • mock
    • typescript

    About

    You say

    “Write an Effect test for fetchUser with a mock layer and a network error case.”

    Card for the “Testing an Effect app with layers” skill

    Skill published by thebushidocollective under the Apache-2.0 license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to test an Effect application with mock layers
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE3.8 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md14.6 KB

    Origin and licence

    Listed unmodified

    Author
    thebushidocollective
    Source
    github.com/thebushidocollective/han/tree/19caa51d5fd144ef6b2764f2332f4c856aa5d1af/plugins/frameworks/effect/skills/effect-testing
    Licence
    Apache-2.0

    Notice

    « effect-testing » (thebushidocollective, Apache-2.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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