GitHub Actions: How to run test inside container - docker

Question

I wanted to run django test cases inside container.
I am able to pull private image from docker hub. but when I ran command to test, It is failed to run.
Anyone tried running test cases inside the container.
jobs:
test:
container:
image: abcd
credentials:
username: "<username>"
password: "<password>"
steps:
- uses: actions/checkout#v2
- name: Display Python version
run: |
python -m pip install --upgrade pip
pip install -r requirements/dev.txt
- name: run test
run: |
python3 manage.py test

Answer 1

In my experience, I found out that using GitHub's container instruction causes more confusion than simply running whatever you want on the runner itself, as if you are running it on your own machine.
A big majority of the tests I am running on GitHub actions are running in containers, and some require private DockerHub images.
I always do this:
Create a docker-compose.yml for development use, so I can test things locally.
Usually in CI, you might want slightly different things in your docker-compose (for example, no volume mappings) - if this is the case, I am creating another docker-compose.yml in a .ci subfolder.
My docker-compose.yml contains a test service, that runs whatever test (or test suite) I want.
Here is a sample GitHub actions file I am using:
name: Test
on:
pull_request:
push: { branches: master }
jobs:
test:
name: Run test suite
runs-on: ubuntu-latest
env:
COMPOSE_FILE: .ci/docker-compose.yml
DOCKER_USER: ${{ secrets.DOCKER_USER }}
DOCKER_PASS: ${{ secrets.DOCKER_PASS }}
steps:
- name: Checkout code
uses: actions/checkout#v2
- name: Login to DockerHub
run: docker login -u $DOCKER_USER -p $DOCKER_PASS
- name: Build docker images
run: docker-compose build
- name: Run tests
run: docker-compose run test
Of course, this entails setting up the two mentioned secrets, but other than that, I found this method to be:
Reliable
Portable (I switched from Travis CI with the same approach easily)
Compatible with dev environment
Easy to understand and reproduce both locally and in CI