Fix: Read replicas connection settings replaced by master settings (continuation)

[stevenhansel]

Based on the previous pull request for fixing #1963

This PR adds the unit test to check if MikroORM is initialized with replicas, when getting the connection with the params of read, it should return the configuration with the replicas db configuration.

[B4nan]

Are the tests passing for you locally? Because I see you did the very same change as in the old PR but many tests were failing.

[stevenhansel]

@B4nan Sometimes i do get an error like database_name of x is not found when running all the tests. So, I thought that those tests were failing because of my testing setup or something else. I also tried testing only on the unit tests that I made, and they worked perfectly fine.

Do you have any hints regarding why those errors are showing? because I also tried running the tests in the master branch, and all the tests passed.

[B4nan]

Well, CI tests are not passing, and they were not passing with the previous PR too, so this will be most probably something wrong with the change you made in code. I don't have any hints, the tests should create databases automatically.

Or it might as well be some other part of code that just relied on the old (and buggy) behaviour.

[stevenhansel]

Well, CI tests are not passing, and they were not passing with the previous PR too, so this will be most probably something wrong with the change you made in code. I don't have any hints, the tests should create databases automatically.

Or it might as well be some other part of code that just relied on the old (and buggy) behaviour.

I will investigate further on what's causing this and find a fix

[B4nan]

Let me know if you struggle with that, I can take a look locally too. I'd expect it will be something in the DatabaseDriver.createReplicas method.

Or even something with the MySQL tests that are using read replicas.

[B4nan]

fixed via #2152