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pytest-gen

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by github · part of github/copilot-cli-for-beginners

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

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🧩 One of 4 skills in the github/copilot-cli-for-beginners package — works on its own, and pairs well with its siblings.

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

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This is the exact playbook injected into your agent when the skill activates — shown here so you can audit it before installing. You don't need to read it to use the skill.

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

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

Template

Copy & paste — that's it
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