testing-rules

testing-rules is a cursor rule for Cursor from dobryakov/cursor-rules. It costs 287 tokens per session, scanned A, original, MIT.

A set of testing instructions for software projects that use Docker, a tool for running applications in isolated containers.

In plain words
What is it for?
Running unit, API, end-to-end, browser, performance, SDK, and client tests; rebuilding test containers, applying migrations, and debugging test failures.
Why use it?
It gives coding agents a consistent way to run tests in the right containers instead of on the developer’s computer, while checking common setup problems first.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit Running unit, API, end-to-end, browser, performance, SDK, and client tests; rebuilding test containers, applying migrations, and debugging test failures.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/dobryakov/cursor-rules/testing-rules
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/dobryakov/cursor-rules

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for testing-rules

README.md
[![agentmods](https://agentmods.dev/badge/rules/dobryakov/cursor-rules/testing-rules/github.svg)](https://agentmods.dev/rules/dobryakov/cursor-rules/testing-rules)
Your own site
<a href="https://agentmods.dev/rules/dobryakov/cursor-rules/testing-rules"><img src="https://agentmods.dev/badge/rules/dobryakov/cursor-rules/testing-rules/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for testing-rules

Your own site · 80×15
<a href="https://agentmods.dev/rules/dobryakov/cursor-rules/testing-rules"><img src="https://agentmods.dev/badge/rules/dobryakov/cursor-rules/testing-rules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 287 This file is loaded in full into every session.
When invoked 287 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00287 $0.00287
Opus 5.5 $0.00115 $0.00115
Sonnet 5.5 $0.00057 $0.00057
Haiku 4.5 $0.00029 $0.00029

Measured 1mo ago against content hash 2613318e5415, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

testing-rules scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

en/rules/testing-rules.mdc · 19 lines

What it actually says

Testing Strategy

  • Do not run tests on the host! Run tests inside docker containers.
  • After completing each task, run the relevant automated tests, including browser and performance tests whenever possible.
  • Choose the environment according to the type of tests: put unit tests inside the service container, put API and e2e tests in separate test containers. Make sure to add the tests dir to the image.
  • Connect test containers to the main docker-compose.yml.
  • Before starting tests, check if the test container needs to be rebuilt and migrations applied.
  • If the project includes an SDK or software clients, they must be covered by separate tests.
  • If using Playwright, make sure you have browsers installed to the test container.
  • If using Playwright, consider to use proper "FROM" image (for example, debian-based node.js image) in the Dockerfile before building test container.
  • When calling docker compose logs with tail, use proper syntax: docker compose logs --tail 10 <container name>.
  • It is recommended to include tests dir to the container as volumes in docker-compose.yml to re-run the tests without re-building the image.
  • Always try first to debug the errors/warnings by running the corresponding tests. Add the tests if its needed.
  • After fixing every bug, write tests to cover it, and run them.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 19 lines · 287 tokens per session scan A 2613318e5415

Subscribe to this mod's changes

testing-rules is a cursor rule published in the GitHub repository dobryakov/cursor-rules (2 stars, last pushed 4mo ago), licensed MIT. It adds 287 tokens to every session, about $0.0011 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.