mbigras / pytest-infrastructure

This repository illustrates testing infrastructure.

pytest-infrastructure

Illustrates testing infrastructure.

Overview

Inspired by terratest. You create infrastructure, test the infrastructure, and tear it down. Terratest uses golang and terraform. This repository illustrates the same idea with python, vagrant, and ansible. Also there is a docker test.

This is what happens when you type make test:

• A vagrant machine is launched
• Tests are performed by running commands.
• The vagrant machine is torn down
• A docker image is built
• A docker container is created and started
• Tests are performed by running commands and issuing requests
• The docker container is removed

Quickstart

make setup
make test

Pytest interesting points

• A test passes if the command succeeds and fails if the command fails.
• A fixture is used to create a vagrant machine at the start of the test module and tear it down at the end.
• If a command fails then an exception is raised. This is the mechanism for marking a test as a failure. The raised exception tells pytest the test failed. If no exception is raised then pytest marks the test as passing. This avoids adding assert result.returncode == 0 after every test.