I am creating a parallel Flutter unit test on GitLab CI to avoid 60 minutes run-time limit.
The initial command was
flutter test --machine --coverage ./lib > test-report.jsonl
The process took around 59 minutes because we have a lot of unit tests.
In order to reduce the CI pipeline time, I modify the pipeline to be parallel using flutter shard and GitLab CI parallel feature.
The command is like this
flutter test \
--total-shards $CI_NODE_TOTAL \
--shard-index $( expr $CI_NODE_INDEX - 1 ) \
--machine \
--coverage \
--coverage-path coverage/lcov.info-$( expr $CI_NODE_INDEX - 1 ) \
./lib \
> test-report.jsonl-$( expr $CI_NODE_INDEX - 1 )
However, all the parallel jobs still run more than a 60-minute time limit.
What did I miss or how to debug it?