tests

A set of rules for writing tests, which are small programs that check whether code behaves correctly. It keeps tests short, focused, and consistent with the surrounding test file.

In plain words
What is it for?
Use it when adding or changing tests: choose clear names, reuse existing fixtures, follow the file's structure, and keep each test focused on one behavior.
Why use it?
It reduces duplicated test logic, unnecessary setup, and tests that are hard to understand or maintain. It also prevents adding snapshots or private-method tests without a reason.

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/inboxpraveen/minimize-cursor-cost/tests
Clone the repo
git clone --depth 1 https://github.com/inboxpraveen/Minimize-Cursor-Cost

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 283 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.00283
Opus 5 $0.00000 $0.00142
Sonnet 5 $0.00000 $0.00057
Haiku 4.5 $0.00000 $0.00028

Measured yesterday against content hash fcfaa275ffa7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tests 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 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.

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.

lean-cursor/.cursor/rules/tests.mdc · 34 lines

What it actually says

Test File Rules

Output discipline

  • Write the minimum test that proves the behavior
  • No "describe the purpose" comments — test names are the documentation
  • Don't repeat the implementation logic inside the test

Test naming

  • Match the naming style already in the file
  • Prefer: it("returns X when Y") over it("test case 1")
  • Don't rename existing tests

Mocks

  • Reuse existing mock factories/fixtures — don't create new ones unless missing
  • Inline small mock data; reference fixtures for large data
  • Show only the mock lines that changed

When adding tests

  • Add to the existing describe block if one exists — don't create a new one
  • Follow the existing Arrange/Act/Assert structure (or Given/When/Then)
  • One assertion focus per test — don't bundle unrelated assertions

Never

  • Don't add snapshot tests unless asked
  • Don't test private methods unless asked
  • Don't add setup/teardown unless required for the new test
  • Don't regenerate passing tests while adding new ones
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 · 34 lines · 0 tokens per session scan A fcfaa275ffa7

Subscribe to this mod's changes

tests is a cursor rule published in the GitHub repository inboxpraveen/Minimize-Cursor-Cost (6 stars, last pushed 16d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 283 tokens. 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.