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node.jsmongodbunit-testingtddjestjs

MongoError: Cannot create collection users - database is in the process of being dropped

I have a REST API and I'm writing TDD for this project. My TDD is consisted of two parts: route and service. I chose to use Jest. I have a MongoDB database that I use for testing. When each test is completed, I reset my database using the afterAll() method. In this method, I run the mongoose.connection.dropDatabase function.

There is no error when I ran only one test file but when I run multiple test files, I get an error. The error message:

MongoError: Cannot create collection auth-db.users - database is in the process of being dropped.

I share sample codes with you:

users.route.test.ts:

https://gist.github.com/mksglu/8c4c4a3ddcb0e56782725d6457d97a0e

users.service.test.ts:

https://gist.github.com/mksglu/837202c1048687ad33b4d1dee01bd29c

When all my tests run, "sometimes" gives errors. I wrote the above error message. The reason for this error is that the reset process still continues. I can't solve this problem. I'd appreciate it if you could help.

Thanks.

Solution

  • https://jestjs.io/docs/en/cli.html#runinband

    What you are looking for is --runInBand command. Which makes jest to run serially instead of creating a worker pool of child processes that run tests