python-testing-patterns

python-testing-patterns is a skill for Claude Code, Codex from bugrabilge/bilge-development-kit. It costs 38 tokens per session (263 once invoked), scanned A, original, MIT.

A guide to testing Python software with pytest, a Python testing tool, including test-driven development (TDD), where tests are written before the code they check.

In plain words
What is it for?
Use it to create unit and integration tests, fixtures, mocks, parameterized cases, property-based tests, CI test runs, and tests for failing behavior.
Why use it?
It helps catch regressions and make tests repeatable when code uses databases, APIs, external services, asynchronous tasks, or concurrency.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to create unit and integration tests, fixtures, mocks, parameterized cases, property-based tests, CI test runs, and tests for failing behavior.

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Install with agentmods
npx agentmods add skills/bugrabilge/bilge-development-kit/python-testing-patterns
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.

Any agent
npx skills add bugrabilge/bilge-development-kit --skill python-testing-patterns
Clone the repo
git clone --depth 1 https://github.com/bugrabilge/bilge-development-kit

Made for: Claude Code, Codex.

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 python-testing-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/bugrabilge/bilge-development-kit/python-testing-patterns/github.svg)](https://agentmods.dev/skills/bugrabilge/bilge-development-kit/python-testing-patterns)
Your own site
<a href="https://agentmods.dev/skills/bugrabilge/bilge-development-kit/python-testing-patterns"><img src="https://agentmods.dev/badge/skills/bugrabilge/bilge-development-kit/python-testing-patterns/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 python-testing-patterns

Your own site · 80×15
<a href="https://agentmods.dev/skills/bugrabilge/bilge-development-kit/python-testing-patterns"><img src="https://agentmods.dev/badge/skills/bugrabilge/bilge-development-kit/python-testing-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 263 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00038 $0.00263
Opus 5.5 $0.00015 $0.00105
Sonnet 5.5 $0.00008 $0.00053
Haiku 4.5 $0.00004 $0.00026

Measured 1mo ago against content hash 143614329105, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-testing-patterns 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.

Origin

Copies of this mod

4 near-identical copies found in the catalogue:

skills/python-testing-patterns/SKILL.md · 40 lines

What it actually says

Python Testing Patterns

Comprehensive guide to implementing robust testing strategies in Python using pytest, fixtures, mocking, parameterization, and test-driven development practices.

Use this skill when

  • Writing unit tests for Python code
  • Setting up test suites and test infrastructure
  • Implementing test-driven development (TDD)
  • Creating integration tests for APIs and services
  • Mocking external dependencies and services
  • Testing async code and concurrent operations
  • Setting up continuous testing in CI/CD
  • Implementing property-based testing
  • Testing database operations
  • Debugging failing tests

Do not use this skill when

  • The task is unrelated to python testing patterns
  • You need a different domain or tool outside this scope

Instructions

  • Clarify goals, constraints, and required inputs.
  • Apply relevant best practices and validate outcomes.
  • Provide actionable steps and verification.
  • If detailed examples are required, open resources/implementation-playbook.md.

Resources

  • resources/implementation-playbook.md for detailed patterns and examples.
Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 40 lines · 38 tokens per session scan A 143614329105

Subscribe to this mod's changes

python-testing-patterns is a skill published in the GitHub repository bugrabilge/bilge-development-kit (10 stars, last pushed 6mo ago), licensed MIT. It adds 38 tokens to every session and 263 once invoked, about $0.0002 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 2026-09-03.

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