Parallel test running. Documentation, recommendations.

[Kostanos]

Hi, I'm playing with parallel test running.
My main goal is to speed up the tests.
In my case, 70 tests, mostly client-side.
Running without parallel and with parallel 2 or 4 processes, has no changes to the test execution time at all (2 minutes in my case).

I guess, one of the reason is running only one meteor instance, one browser instance?

Is there any recommendations, documentation about how can tests be optimized to run in parallel.

[apendua]

@Kostanos How exactly you're using the parallel test runner?

[Kostanos]

gagarin -p 2

Actually I just realized, I used it wrong, but now half of my tests are failing.
They share the DB right? so, if I use the same fixture in two parallel tests, and one of the tests changing it, the second one will fail because this change also will affect it, no?

[apendua]

@Kostanos You are right. If you want to run them in parallel you will need to make sure that each test is operating on a separate database. But in fact, this is the default behavior so if you are experiencing these problems it probably means that you've turned it off. Correct?

[Kostanos]

I didn't changed any settings regarding using DB, I didn't even knew they exists.

So I run the tests with default settings.

[apendua]

@Kostanos If that's the case then I don't see a reason the test may be failing. Sometimes I got timeout errors if I use too many parallel instances because my processor cannot handle it. Are your errors messages specific to your tests or maybe they look like internal Gagarin errors?