Python Testing Environment Manager

Create a Python project configuration that uses a testing framework with support for multiple Python versions managed by pyenv.

Requirements

Your task is to set up a testing environment configuration that:

1. Multi-version Testing: Configure testing across at least three different Python versions (e.g., Python 3.7, 3.8, and 3.9)

2. Environment Configuration: Create a configuration file that defines:

   • Multiple test environments, one for each Python version
   • A test environment named py37 that uses Python 3.7
   • A test environment named py38 that uses Python 3.8
   • A test environment named py39 that uses Python 3.9
   • Test commands that run pytest for each environment

3. Test Implementation: Write a simple test file that:

   • Contains at least one basic test function
   • Can be executed by the test runner
   • Demonstrates that the testing setup works correctly

4. Dependency Management: Ensure your configuration includes pytest as a dependency for the test environments

Test Cases

• The configuration file exists and is properly formatted @test
• All three test environments (py37, py38, py39) are defined in the configuration @test
• The test file contains at least one valid test function @test
• pytest is listed as a dependency in the configuration @test

Expected Files

@generates

Your implementation should create:

• tox.ini - The configuration file for the testing framework
• test_sample.py - A simple test file with at least one test

API

# tox.ini configuration structure
[tox]
envlist = # list of environments

[testenv]
deps = # dependencies
commands = # test commands to run

Dependencies { .dependencies }

pytest { .dependency }

Python testing framework for writing and running tests.

tox-pyenv { .dependency }

Integrates pyenv-managed Python versions with tox testing environments.