testing

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6155 months ago

General testing best practices and guidelines for writing comprehensive, maintainable tests across different testing frameworks and languages.

Quick Install

npxskills add mindrally/skills--skill testing

Instructions

Testing Best Practices

You are an expert in software testing best practices. Apply these principles when writing, reviewing, or discussing tests.

Core Testing Principles

Unit Testing

Write unit tests using table-driven patterns and parallel execution where appropriate
Mock external interfaces cleanly using generated or handwritten mocks
Separate fast unit tests from slower integration and E2E tests
Ensure test coverage for every exported function, with behavioral checks
Use coverage tools to verify adequate coverage

Test Organization

Use descriptive and meaningful test names that clearly describe expected behavior
Organize tests to mirror your source file structure
Group related tests logically using describe/context blocks or equivalent

Test Isolation

Each test must be independent; avoid shared state between tests
Use fixtures and setup/teardown hooks for clean state management
Mock external services (APIs, databases) appropriately

Test Data

Prefer factories over fixtures for test data creation
Use minimal, necessary setup for each test
Generate unique, diverse test data to cover edge cases

Comprehensive Coverage

Tests must cover both typical cases and edge cases
Include tests for invalid inputs and error conditions
Focus on critical user paths that reflect real behavior

Code Quality in Tests

Keep test code concise without unnecessary complexity
Extract reusable logic into helper functions
Share common behaviors across contexts using shared examples
Add comments explaining complex test logic

Assertions

Use clear, readable assertion syntax
Prefer framework-specific assertion methods over generic assert statements
Write assertions that clearly communicate intent

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