testing

Project-specific Vitest rules for writing and running tests in Caliber. Vitest is a JavaScript and TypeScript test runner.

In plain words
What is it for?
Use them when adding or updating tests, choosing test files, mocking files or child processes, checking coverage, or testing language-model configuration and behavior.
Why use it?
They provide the repository’s test commands and conventions, including mocked language-model calls and isolated environment variables. This reduces the chance that tests contact real providers or interfere with one another.

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/caliber-ai-org/ai-setup/testing
Clone the repo
git clone --depth 1 https://github.com/caliber-ai-org/ai-setup

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 194 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00000 $0.00194
Opus 5 $0.00000 $0.00097
Sonnet 5 $0.00000 $0.00039
Haiku 4.5 $0.00000 $0.00019

Measured yesterday against content hash 2f657a75c504, 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 1 finding 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 yesterday.

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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- Use `vi.mock()` for `fs`, `child_process` · `vi.mocked()` for type-safe assertions
.cursor/rules/testing.mdc · 13 lines

What it actually says

  • Vitest config: vitest.config.ts · Setup: src/test/setup.ts
  • Run all: npm run test · Single: npx vitest run src/scoring/__tests__/accuracy.test.ts
  • Coverage: npm run test:coverage (v8 provider)
  • LLM calls globally mocked in src/test/setup.ts — never call real providers
  • Use vi.mock() for fs, child_process · vi.mocked() for type-safe assertions
  • Tests colocated: src/llm/__tests__/config.test.ts tests src/llm/config.ts
  • Pattern: describebeforeEach(vi.clearAllMocks)it with expect
  • Environment vars: save in beforeEach, restore in afterEach
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. yesterday First seen · 13 lines · 0 tokens per session scan A 2f657a75c504

Subscribe to this mod's changes

testing is a cursor rule published in the GitHub repository caliber-ai-org/ai-setup (1,255 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 194 tokens. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.