testing

A set of rules for writing and organizing software tests. It covers test names and structure, mocking outside services, code coverage, edge cases, and test speed.

In plain words
What is it for?
Use it when creating or changing tests, especially when deciding where test files belong, how to name them, what to mock, and which success and error cases to cover.
Why use it?
It gives AI-assisted development consistent expectations for tests and reduces duplicated, slow, or incomplete test coverage.

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/davidl71/project-management-automation/testing
Clone the repo
git clone --depth 1 https://github.com/davidl71/project-management-automation

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 380 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 $0.00380
Opus 5 $0.00000 $0.00190
Sonnet 5 $0.00000 $0.00076
Haiku 4.5 $0.00000 $0.00038

Measured yesterday against content hash 52537a907737, 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 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.

.cursor/rules/testing.mdc · 52 lines

What it actually says

Testing Rules

Test Organization

File Structure

  • One test file per tool/module: project_management_automation/tools/automation_opportunities.pytests/test_automation_opportunities.py
  • Dedicated files for shared utilities: Shared network utilities → tests/test_utils_network.py
  • Avoid duplicate tests: Never duplicate the same test in multiple files

Naming Conventions

  • Use descriptive test names: test_find_automation_opportunities_success (not test_success)
  • Include context in names to prevent duplicates across files
  • Group related tests into test classes: TestAutomationOpportunitiesTool

See: Test Organization Guidelines

Test Structure

  • Use descriptive test names
  • Follow Arrange-Act-Assert pattern
  • One assertion per test when possible
  • Group related tests into test classes

Mocking

  • Mock external dependencies
  • Use dependency injection for testability
  • Reset mocks between tests

Coverage

  • Aim for >80% code coverage
  • Cover edge cases and error paths
  • Test both happy and unhappy paths

Performance

  • Keep tests fast (<1s each)
  • Use fixtures for expensive setup
  • Run tests in isolation

Running Tests

  • Always use uv run pytest to run tests
  • Never use pip install or manual virtual environments
  • Example: uv run pytest tests/ -v

Checking for Duplicates

  • Run uv run python scripts/check_duplicate_test_names.py before committing
  • Ensure no duplicate test names across different files
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 · 52 lines · 0 tokens per session scan A 52537a907737

Subscribe to this mod's changes

testing is a cursor rule published in the GitHub repository davidl71/project-management-automation (1 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 380 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.