gnomock VS dbcleaner

https://github.com/orlangure/gnomock does this pretty well, but I liked your solution too, it is neat.

gnomock https://github.com/orlangure/gnomock - like testcontainers

Try gnomock (https://github.com/orlangure/gnomock). It creates a mongodb container with a random port which you can use from your go tests. See project readme for an example (it uses postgres but it is very similar to mongodb).

You could check out Gnomock (https://github.com/orlangure/gnomock). It offers a different approach than what you asked, but maybe it'll suit your use case. It allows to easily setup a real DB like postgres in a docker container and then delete ot when tests are done.

It is not hard to isolate and stub a database the problem is you will not catch a lot of errors, e.g. writing a 40 char string into a VCHAR(10), DateTime conversations, ...

In Ruby on Rails it is quite common to use a real database in the unit tests. Even before containers came out and it is still fast (yes, less than 1 second).

In rails you use the same database instance for all the tests, so you do not have spin up a database instance for every case. Instead you use a database cleaner.

There also exists a JS implementation: https://github.com/khaiql/dbcleaner