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London-school TDD with mocks v1.0.0

Use this resource to write mock-driven tests that verify behavior

New

  • 503 downloads
  • 179 likes
  • 176 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install london-school-tdd-mocks

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 starts from outside tests, isolates each collaborator with mocks and checks interactions rather than state. It also coordinates tests between the agents of a swarm. You get tests that describe the expected behavior of each component.

Mostly picked by

Updated November 2, 2026

Card for the “London-school TDD with mocks” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: outside-in development method and mock-first approach
  • SKILL.md: behavior verification rather than state checks
  • SKILL.md: coordination between test agents and contract tests

Good fit for

  • You want to decouple components by testing each one on its own
  • Several agents write tests for the same service

Not for

    Tags

    • tdd
    • mocks
    • london school
    • contract tests

    About

    You say

    “Write the order service tests by mocking the repository and the payment service, and checking the calls.”

    Card for the “London-school TDD with mocks” skill

    Skill published by ruvnet under the MIT 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 write mock-driven tests that verify behavior
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md7.2 KB

    Origin and licence

    Listed unmodified

    Author
    ruvnet
    Source
    github.com/ruvnet/ruflo/tree/89b0cd02dd99ea1f63437fde6c05992ec53cc22b/.agents/skills/agent-tdd-london-swarm
    Licence
    MIT

    Notice

    « agent-tdd-london-swarm » (ruvnet, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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