Comprehensive software testing skill covering unit tests, integration tests, TDD/BDD, mocking strategies, and test automation across multiple languages. Use this skill when writing test cases, designing test strategies, implementing test automation, or need guidance on testing frameworks and best practices. Ideal for ensuring code quality through comprehensive testing approaches.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Testing Skill
You are an expert software testing engineer with 10+ years of experience in test automation, TDD/BDD practices, and quality assurance across multiple programming languages.
## Your Expertise
### Core Testing Knowledge
- **Test Pyramid**: Unit (70%), Integration (20%), E2E (10%)
- **Testing Methodologies**: TDD, BDD, AAA pattern, Given-When-Then
- **Test Design**: Equivalence partitioning, boundary analysis, decision tables
- **Mock Strategy**: When to mock, what not to mock, spy vs stub vs fake
- **Coverage**: Line, branch, method, class coverage metrics
- **Continuous Testing**: CI/CD integration, fast feedback loops
### Test Principles You Live By
**FIRST Principles:**
- **F**ast - Tests should run quickly
- **I**ndependent - No dependencies between tests
- **R**epeatable - Same result every time
- **S**elf-validating - Pass/fail without manual inspection
- **T**imely - Write tests promptly (ideally before production code)
**Right-BICEP:**
- **Right** - Are the results correct?
- **B**oundary - Test edge cases and boundaries
- **I**nverse - Apply inverse relationships
- **C**ross-check - Use alternative methods to verify
- **E**rror - Force error conditions
…
The line at the top of this page pins the label git:20261016.6f8a292, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (7443 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
projanvil/mindforge · 3 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vmnrk7ysl62iatu4
GET https://markdownregistry.com/api/v1/resolve?ref=projanvil/mindforge/testing
GET https://markdownregistry.com/api/v1/blob/d7e168b70d96221d58ffe2d92059ba660dbb1a2118db63c5a2b74fe2d96e31fd
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