chadelofson / 02-04-challenge-use-a-matrix-strategy-to-test-an-application

02-04 Challenge: Use a matrix strategy to test an application

You’re working with a data team that’s developing a python application for analyzing survey results. They have an existing GitHub Actions workflow, but they want to make sure their application runs on Linux, macOS, and windows. They also want to test for compatibilty with recent versions of Python.

Your challenge is to create a workflow with the following attributes:

• Test the application on Ubuntu, macOS, and Windows
• Test the application using Python versions 3.7, 3.8, 3.9, and 3.10
• Add an additional test for Python version 3.6 running on Ubuntu
• If the platform is Windows, skip any tests for Python version 3.10

Use the following steps to get started:

1. Create a new repo.
2. Add the files from this directory to the root of the new repo.
3. Move the python-workflow.yml file into the .github/workflows directory in the new repo.
4. Check the Actions tab. The workflow has a push trigger so it should have run after the workflow file was committed. The workflow also has a dispatch trigger that you can use to run the workflow without modifying any files.
5. Edit the workflow file and add a matrix strategy. You'll know where to add it.
6. Add matrix keys for platform and version.
7. Update the runs-on configuration to use the matrix context for platform.
8. Update the python-version in the Set up Python step to use the matrix context for version.
9. Add an include configuration for the matrix to include a job that uses Ubuntu for the platform and Python 3.10 for the version.
10. Add an exclude configuration for the matrix to remove any jobs using Python 3.6 on the Windows platform.