End-to-end tests with the official MongoDB Node.js driver

These exercise mongo-light from a real driver over TCP: full CRUD, query operators, aggregation, error codes, concurrent clients, and crash recovery.

Setup

cd tests/e2e
npm init -y >/dev/null
npm install mongodb

Run

Start the server, then run the suites against it (defaults to port 27020):

zig build
zig-out/bin/mongo-light --port 27020 --db /tmp/ml-e2e.log &

node tests/e2e/e2e.js          # CRUD + operators + aggregate + errors (29 checks)
node tests/e2e/e2e2.js concurrent   # 8 clients: 4 writers + 4 readers (2 checks)
node tests/e2e/e2e2.js crash-a      # write 50 docs, then kill -9 the server
node tests/e2e/e2e2.js crash-b      # restart and verify all 50 survived

e2e2.js concurrent is safe to repeat against a running server (it drops its collection first); crash-a/crash-b are two halves of one scenario.