The gitlab-ci job does not fail but the test does - docker

Question

I need a failed test in my pipeline to fail the job so that I can have control over it. The problem is that the tests are being run in a "docker in docker" so the job doesn't fail because the container did run correctly, but the test doesn't return an error code (even if one fails).
The script "docker:test" run my test suit in a container and my pipeline is like:
image: docker:dind #Alpine
stages:
- install
- test
# - build
- deploy
env:
stage: install
script:
- chmod +x ./setup_env.sh
- ./setup_env.sh
artifacts:
paths:
- .env
expire_in: 1 days
tests:
stage: test
before_script:
- docker rm extractos-bancarios-test || true
script:
- apk add --update nodejs npm
- npm run docker:test
- docker cp extractos-bancarios-test:/usr/src/coverage .
- docker cp extractos-bancarios-test:/usr/src/junit.xml .
cache:
paths:
- coverage/
artifacts:
when: always
paths:
- coverage/
reports:
junit:
- junit.xml
# docker image:
# stage: build
# script:
# - npm run docker:build
remove .env:
stage: deploy
script:
- rm .env
pages:
stage: deploy
script:
- mkdir .public
- cp -r coverage/* .public
- mv .public public
artifacts:
paths:
- public
# only:
# - main
And my npm script is:
"docker:test": "npm i && tsc && docker build -t extractos-bancarios-test --target test . && docker run -d --name extractos-bancarios-test extractos-bancarios-test && docker logs -f extractos-bancarios-test >> logs.log",
I need to fail the pipeline when a test fails while using docker in docker

Answer 1

I was able to solve the problem on my own and I leave it documented so that no one wastes as much time as I did.
For the container inside the first container to fail, I needed it to return an exit code 1 when there is an error in the report. So I added a conditional with a grep in the scripts section of my .gitlab-ci.yml:
tests:
stage: test
before_script:
- docker rm extractos-bancarios-test || true
- rm junit.xml || true
- rm -r coverage || true
script:
- apk add --update nodejs npm
- npm run docker:test
- docker cp extractos-bancarios-test:/usr/src/coverage .
- docker cp extractos-bancarios-test:/usr/src/junit.xml .
- if grep '<failure' junit.xml; then exit 1; else exit 0; fi
cache:
paths:
- coverage/
artifacts:
when: always
paths:
- coverage/
reports:
junit:
- junit.xml