background

a large $group expression seems to break and no longer group

reproducing

A docker compose configuration is setup to create 6.0.16 and 6.0.17 instances of mongo. The tests service (behind a profile) will execute the same set of inserts, query and validation steps against each instance.

Expected outcome

• 4 documents are created
• aggregation creates a single output document

start the mongo instances

docker compose up -d

execute the test script

docker compose run tests