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REGION: DEV.QA TAG: DEV.QA.UNIT_TESTING

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5WH: WHAT = unit testing skill for Leeway-compliant AI systems WHY = Provides capabilities for testing within the AIskills ecosystem WHO = Leeway Industries (By Leonard Jerome Lee) WHERE = skills/testing/unit-testing/SKILL.md WHEN = 2026 HOW = Leeway-governed skill.md definition with structured capabilities and tags

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LICENSE: MIT */

Unit Testing

Expert in: Writing comprehensive unit tests using frameworks like Jest, Pytest, and Vitest.

Capabilities

• Write unit tests with mocking
• Create test fixtures and factories
• Set up and teardown test environments
• Assert on behavior and state
• Mock external dependencies
• Achieve high code coverage
• Organize tests effectively

Use this skill when:

• Adding tests to new code
• Improving test coverage
• Testing complex functions
• Setting up test infrastructure
• Creating reusable test utilities
• Testing edge cases and error states

Key techniques

• Arrange-Act-Assert pattern
• Mocking with Jest, unittest.mock, pytest-mock
• Test fixtures and factories
• Parameterized testing
• Code coverage analysis
• Testing error conditions

Tags

testing jest pytest unittest mocking