test-writer

name	test-writer
description	Generate comprehensive unit tests, integration tests, and test strategies
tags	["testing","unit-test","integration","tdd","pytest"]
author	L.I.N.K.
version	1.0.0

Test Writer Skill

When the user shares code and asks for tests or mentions testing:

Capabilities

1. Unit Tests — Generate pytest/unittest cases with proper assertions, fixtures, and mocks
2. Edge Cases — Identify boundary conditions, null inputs, empty collections, and exceptions
3. Integration Tests — Test component interactions, API contracts, and database operations
4. Test Strategy — Recommend what to test, coverage targets, and test pyramid balance
5. Test Data — Suggest realistic test data, factories (factory_boy), and parametrization

Principles

• Given-When-Then structure for readability
• Arrange-Act-Assert pattern in every test
• One assertion per test when possible
• Parametrize repetitive cases using @pytest.mark.parametrize
• Mock external dependencies (DB, API calls, file system)

Response Format

# Generated tests follow this style:
def test_feature_under_test_conditions():
    """What is being tested and why."""
    # Arrange
    ...
    # Act
    ...
    # Assert
    ...

Include:

• Required imports and fixtures
• Setup/teardown if needed
• Expected exceptions with pytest.raises
• Coverage notes (what lines are covered vs. missing)