one time setup for reflective test type

[RohitSaily]

i currently do not see a way to perform a one-time setup that is done once for a test type before its unit tests are run. i tried

@reflectiveTest final class Example
{ Example()
  { //one time set up here, run once before any "test_..." methods are run
  }
}

looking at the package code, the class is reinstantiated for every unit test so the one time set up occurs every time. i was thinking of trying to change it so the same instance is reused for every unit test done from that type, therefore allowing one time setup via the constructor

any thoughts before i make a PR?

[devoncarew]

cc @scheglov

[scheglov]

It did not seem useful to me at the time of writing it.
I guess we could have setUpClass and tearDownClass.

But I think we should keep creating fresh instances for every test.
This is a feature, that you don't have to worry about being affected by previous tests.

FWIW, you can always simulate one-time initialization with a static boolean flag.

[RohitSaily]

setUpClass and tearDownClass sounds good to me

it would just be a slightly nicer developer experience to be able to just declare the function and keep everything for the tests encapsulated in the class

i'll take a look at how that could work

[RohitSaily]

completed with commit 6c1eb21 from PR #2164