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m

mitch

10/12/2020, 11:52 PM
@sam qq just to clarify my understanding, am i right to understand that spring listener will try to boot up spring before each spec class that summons the bean autowiring?
s

sam

10/13/2020, 12:22 AM
not sure what you mean by boot up string (my knowledge of spring isn't amazing) but it will ask spring to "populate" the bean yes, or it will ask spring to create the bean if it's a constructor injected one
m

mitch

10/13/2020, 12:23 AM
right. yeah i think i understand that similarly because i was reading the code and it does try to create an application context for each spec class
i was asking because my colleague asked me that question so i might cross-check with the expert 😆
s

sam

10/13/2020, 12:24 AM
It creates a
TestContextManager
for each spec
That's what the junit support does too
m

mitch

10/13/2020, 12:25 AM
i guess their q is something like this is it
spec 1 -- application context 1

spec 2 -- application context 2

spec 3 -- application context 3
or does that TestContextManager caches the context such that
spec 1 -- application context 1

spec 2 -- application context 1

spec 3 -- application context 1
s

sam

10/13/2020, 12:26 AM
The manager itself is freshly created for each spec. I'm not sure if it's sharing the beans behind the scenes or creating fresh beans to be used by itself.
I'm trying to find the junit one to see what that does
So in junit4 it would create a new TestContextManager for each SpringJUnit4ClassRunner, but I don't know if the runner itself is cached between classes.
m

mitch

10/13/2020, 12:29 AM
hmm interesting. thanks @sam i was kinda hoping that it’s doing the first one (creating fresh ones) but we might investigate this. Spring has so much mutable references under the hood.. if it’s akka i might be able to reason about it quite a bit.
s

sam

10/13/2020, 12:30 AM
JUnit5 stores the manager in the extension store so I guess in junit5 its shared
m

mitch

10/13/2020, 12:30 AM
ha!
in kotest we’re creating them fresh
s

sam

10/13/2020, 12:30 AM
yes
m

mitch

10/13/2020, 12:30 AM
nice
s

sam

10/13/2020, 12:30 AM
in kotest, the manager is created per class, same as junit 4
5 shares the manager
t

thanksforallthefish

10/13/2020, 5:51 AM
you sure? creating a fresh context per class would mean in most situation (unless graalvm) your tests would be really really slow. pretty sure the context is shared, but will double check as soon as I am on the project using kotest (which unfortunately is in 2 weeks)
I mean, the code really seems to recreate a manager for each spec, but experience seems to disagree
ok, if you look a bit deeper, the context is cached by Spring itself, but disclaimer, it is Spring code, it tends to be well written but complex, I might read it wrong (
TestContextManager
->
BootstrapUtils
)
s

sam

10/13/2020, 8:44 AM
Makes sense. Spring does love its global state