Mongoose aggregation query fails in Jest/Mockgoose test, works elsewhere

Question

I\'m trying to create some tests for my Mongoose models, and I can\'t figure out how to get the Jest/Mockgoose test to pass for a shorthand query/aggregation pipeline (see b

Answer 1

I have faced similar kind of problem and after researching a lot I found that that it was due to older version of mongoose as earlier versions are not compatible with breaking changes in MongoDB 3.6 and above.

I upgraded mongoose version one by one and I found that it works perfectly fine with mongoose version 4.12.2 or above (mongoose@4.12.2).

You can upgrade your mongoose version by running following command:

npm install mongoose@4.12.2