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testing-python

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Write and evaluate effective Python tests using pytest. Use when writing tests, reviewing test code, debugging test failures, or improving test coverage. Covers test design, fixtures, parameterization, mocking, and async testing.

tasks/fix-build-agentops/environment/skills/testing-python/SKILL.md

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# Writing Effective Python Tests

## Core Principles

Every test should be **atomic**, **self-contained**, and test **single functionality**. A test that tests multiple things is harder to debug and maintain.

## Test Structure

### Atomic unit tests

Each test should verify a single behavior. The test name should tell you what's broken when it fails. Multiple assertions are fine when they all verify the same behavior.

```python
# Good: Name tells you what's broken