Pytest Gen Agent Skill

by github

Generate comprehensive pytest tests - use when generating tests, creating test suites, or testing Python code

338 tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

2768

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/github/copilot-cli-for-beginners --skill pytest-gen

The instruction itself

4 sections, as written by the author

Pytest Generation Skill

When generating tests, follow this structure.

Test Organization

Group tests by function under test
Use @pytest.mark.parametrize for multiple inputs
Use fixtures for shared setup
Follow arrange/act/assert pattern

Coverage Requirements

Happy path (expected usage)
Edge cases (empty strings, None, boundary values)
Error cases (invalid input, file not found, wrong types)
Integration (functions working together)

Template

import pytest
from module_under_test import function_to_test


@pytest.fixture
def sample_data():
    """Provide shared test data."""
    return {"key": "value"}


class TestFunctionName:
    """Tests for function_name."""

    def test_happy_path(self, sample_data):
        result = function_to_test(valid_input)
        assert result == expected_output

    def test_empty_input(self):
        result = function_to_test("")
        assert result == expected_for_empty

    @pytest.mark.parametrize("input_val,expected", [
        ("valid", True),
        ("", False),
        (None, False),
    ])
    def test_various_inputs(self, input_val, expected):
        assert function_to_test(input_val) == expected

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How to use it

Copy the folder

Take github/pytest-gen from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.