testing

A set of rules for writing and running Go tests. It recommends tests beside the code they cover, Go's standard testing package, table-driven tests for multiple cases, and names such as TestMethodName_Scenario.

In plain words
What is it for?
Use it to add tests, run all or selected Go packages, check for race conditions, and choose appropriate test error handling. It is intended for developers working in Go codebases.
Why use it?
It gives a project a consistent way to check behavior and find regressions. It also keeps tests focused on public behavior while isolating external systems such as hardware or shell commands.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/autonomous-ai/autonomous-os/testing
Clone the repo
git clone --depth 1 https://github.com/autonomous-ai/autonomous-os

Made for: Cursor.

Per session 202 This file is loaded in full into every session.
When invoked 202 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00202 $0.00202
Opus 5 $0.00101 $0.00101
Sonnet 5 $0.00040 $0.00040
Haiku 4.5 $0.00020 $0.00020

Measured 2d ago against content hash b9ac33acce96, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

testing 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 2d 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.

.cursor/rules/testing.mdc · 30 lines

What it actually says

Testing Rules

Test Files

  • Test files live next to the code they test: internal/led/engine_test.go
  • Use standard testing package — no external test frameworks
  • Table-driven tests preferred for multiple cases

Running Tests

go test ./...                    # All tests
go test ./internal/led/...       # Single package
go test -run TestFunctionName    # Single test
go test -v ./...                 # Verbose output
go test -race ./...              # Race detector

Conventions

  • Test function names: TestMethodName_Scenario (e.g. TestEncodeColors_BufferLength)
  • Use t.Errorf or t.Fatalf — not panic or log.Fatal in tests
  • Test exported behavior, not internal implementation details
  • Mock external dependencies (shell commands, hardware), not internal services
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. 2d ago First seen · 30 lines · 202 tokens per session scan A b9ac33acce96

Subscribe to this mod's changes

testing is a cursor rule published in the GitHub repository autonomous-ai/autonomous-os (247 stars, last pushed 2d ago), licensed Apache-2.0. It adds 202 tokens to every session, about $0.0010 per session on Opus 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 2026-08-30.