Configuration for tests? CONTRIBUTING.md needed about mongodb HOT 4 CLOSED

@fireproofsocks for now the best way to get up and running is with the start_mongo.bash and stop_mongo.bash scripts. You'll need to have a suitable version of MongoDB installed and available on $PATH.

I agree it's not clear how to get up and running. I'm planning some changes to our CI process in #365 that will have the side effect of making this clearer.

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The start_mongo.bash and stop_mongo.bash scripts were actually what initially lead me to create this ticket. I found these scripts to be pretty unusual and from what I could see, totally undocumented. Per mention of getting CI and tests working, I would question the usefulness of these bash scripts. A think a more abstract approach would be more helpful (e.g. one that would easily facilitate use of interchangeable dockerized versions of mongo). Would that make a good ticket? Right now, I can't even run tests.

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It would make a good improvement but replacing start_mongo.bash with a docker compose is non-trivial since we must consider replica sets and local sockets.

If you like you could add some docs for the existing scripts. I'm wary of making too many changes beyond the code we inherited before we get proper CI and validation in place so we can safely make changes, taking place in #370 .

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Yeah, I know what you mean. Yet I feel completely stuck because I can't even run tests here without hacking my machine apart (there were many reasons I kicked mongo off my local machine and banished it to docker). To be clear I am not advocating for Docker Compose, just more of an agnostic approach so the code doesn't need to know or care where the mongo instance is running -- it just needs enough info to connect w sufficient privs. I think CI would actually be much easier if it were to specify standard docker images instead of this custom setup.

I created issue #373

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