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testing

Implement behavior-driven testing patterns through public APIs.

1|Updated Mar 22, 2026
Search Tags:#code quality#testing#BDD#behavior-driven#test patterns
One-click install
npx skills add https://github.com/mikemyl/verified-development --skill testing-mikemyl
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: testing
Source: https://github.com/mikemyl/verified-development/tree/main/skills/testing
Command: npx skills add https://github.com/mikemyl/verified-development --skill testing-mikemyl

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill unit provides guidance on behavior-driven testing patterns and best practices, helping developers write more effective and maintainable tests.

Core Features & Use Cases

  • Behavior-Driven Testing: Encourages testing behavior rather than implementation details for better coverage and maintainability.
  • Actor-BDD Craft Rules: Offers language-neutral guidelines for crafting tests using Behavior-Driven Development (BDD) principles.
  • Mutation-Aware Test Planning: Suggests strategies for identifying gaps in test coverage using mutation analysis.
  • Test Through Public API Only: Promotes testing behavior through public APIs to ensure tests remain valid during refactoring.
  • Coverage Through Behavior: Emphasizes that validation code should be tested through its behavior, not implementation details.
  • Test Factory Pattern: Provides guidelines for creating test data with factory functions to ensure fresh state and maintainability.
  • No 1:1 Mapping Between Tests and Implementation: Advocates for not creating test files that mirror implementation files to ensure tests remain independent of implementation changes.

Quick Start

Load the 'testing' skill to implement behavior-driven testing patterns in your project.

Frequently Asked Questions about testing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write behavior-driven tests that focus on behavior over implementation?▼

Testing through public APIs validates external behavior without coupling tests to internal implementation details. This approach ensures tests remain valid during refactoring and improves long-term code maintainability.

What is the best way to manage test data in behavior-driven development?▼

Using factory functions for test data creation ensures a fresh state for each test run. This test factory pattern provides maintainable data generation, avoiding the pitfalls of shared or static test fixtures.

Why should I avoid a 1:1 mapping between test files and implementation files?▼

Avoiding a 1:1 file mapping ensures tests remain independent of implementation changes. This practice encourages testing behavior through public APIs rather than mirroring structural implementation details, improving test resilience.

How do I find gaps in my test coverage using mutation analysis?▼

Mutation-aware test planning identifies coverage gaps by intentionally modifying code to see if existing tests fail. This strategy highlights untested behavior paths and strengthens overall code quality assurance.

Can I use behavior-driven testing patterns for any programming language?▼

Yes, behavior-driven testing patterns utilize language-neutral guidelines for crafting tests. These BDD principles focus on validating behavior through public APIs, making them applicable across different programming languages and tech stacks.

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