Hello, pytest-docker-compose!

This is a small app for getting acquainted with the pytest-docker-compose plugin.

Deploying with Docker

1. docker build -t hello-pdc .
2. docker network create --driver=bridge hello-pdc
3. docker run --rm --name app --net hello-pdc -d -p 5000:80 hello-pdc

You can access the app on http://localhost:5000/ however the counter won't work because Redis isn't running.

To spin up a Redis instance and connect the app, do the following:

1. docker run --rm --name redis --net hello-pdc -d redis:alpine

Now if you go to http://localhost:5000/ you should see that the counter will now increment as you refresh the page.

To stop the containers from running:

1. docker stop app redis

For more information, refer to Dockerfile in this repository.

Deploying with docker-compose

We only had to deploy two containers, but it ended up being a fair amount of work — there were several moving parts and lots of command-line options to keep track of!

docker-compose makes the whole process considerably easier:

1. docker-compose up

This will spin up the app and redis containers and configure everything correctly. After running the above command, you can view the app on http://localhost:5000/ and the counter will work straightaway.

Press Control-C to bring the containers back down.

For more information, refer to docker-compose.yml in this repository.

Running Unit Tests

Important

This project was written & tested using Python 3.6 — other versions of Python might work, but we never tried.

1. (optional but highly recommended) Create a new virtualenv.
2. pip install -e '.[test-runner]'
3. python setup.py test

This runs the unit tests in unit_tests/counter_test.py. Both tests should pass.

Running Integration Tests

Because integration tests take considerably longer to run, they are not enabled by default. Instead, you will need to use the pytest command explicitly.

Note: the ``pytest`` command was installed when you ran ``pip install`` in the previous step.

1. docker-compose down
2. pytest integration_tests/homepage_test.py

This runs the integration tests in integration_tests/homepage_test.py. Both tests should pass.