Code coverage in gitlab CI/CD

Question

I used Docker-dind to build and test my python code. I confused how to run coverage in gitlab-ci between two following options.

1) Gitlab has coverage by itself [here]

2) I follow python's coverage tutorial and create my own coverage with following:

 coverage:
  stage: test
  script:
      - docker pull $CONTAINER_TEST_IMAGE
      - docker run $CONTAINER_TEST_IMAGE python -m coverage run tests/tests.py
      - docker run $CONTAINER_TEST_IMAGE python -m coverage report -m

When gitlab throws an exception No data to report.:

I guess coverage report command can not access/find .coverage file in the container.

---

So my question is What is the elegant way to run coverage in this situation?

Answer 1

since const's answer has already made the first part easier i.e to get the coverage details, I have tried solve how to get reports?

This is given by Gitlab coverage doc. So your coverage job must be written like this

 coverage:
  stage: test
  script:
      - docker pull $CONTAINER_TEST_IMAGE
      - docker run $CONTAINER_TEST_IMAGE /bin/bash -c "python -m coverage run tests/tests.py && python -m coverage report -m"
  coverage: '/TOTAL.+ ([0-9]{1,3}%)/'

the regex was mentioned in mondwan blog

Addon

If you add the below line in your README.md file you will get a nice badge(in master README.md) that captures your coverage details.

[![coverage report](https://gitlaburl.com/group_name/project_name/badges/master/coverage.svg?job=unittest)](https://gitlaburl.com/group_name/project_name/commits/master)