Sadly I don t think something like `MinSize` is possible for kotlinlang #kotest

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Title

s

simon.vergauwen

06/11/2020, 12:09 PM

Sadly I don’t think something like

MinSize

is possible for

Arb<List<A>>

etc, which is also what I’m looking for in combination with

minSuccessful

. This way I could easily reduce the stress of the test suite depending on where it runs, or depending on what platform it runs when moving to MPP.

s

sam

06/11/2020, 6:54 PM

By stress are you wanting to chang the number of tests basically, depending on env ?

s

simon.vergauwen

06/11/2020, 6:55 PM

Yes, I’d like to configure iterations for

checkAll

and potentially also depth of

Arb.list

or similar. I’m writing property based tests for the new Arrow streaming library, and controlling depth and iterations allows for a much more powerful test suite.

Without killing my local dev machine or free CI 😄

s

sam

06/11/2020, 6:56 PM

There is support for iterations and minSuccess and maxFailures. You could set the iteration count via a sys prop ?

Or set it but have a default

s

simon.vergauwen

06/11/2020, 6:57 PM

Oh I must have missed that.

s

sam

06/11/2020, 6:57 PM

There's several overloads on checkAll. One takes iterations, another takes iterations and PropTestConfig

data class PropTestConfig(
   val seed: Long? = null,
   val minSuccess: Int = Int.MAX_VALUE,
   val maxFailure: Int = 0,
   val shrinkingMode: ShrinkingMode = ShrinkingMode.Bounded(1000),
   val iterations: Int? = null,
   val listeners: List<PropTestListener> = listOf()
)

that should have all the options you need

s

simon.vergauwen

06/11/2020, 6:58 PM

Yes, I should be able to find my way through that! Thanks.

I’ll share the test suites as soon as I publicly PR them. I also have

Arb

for

Array

etc which we might want to PR upstream to kotest

s

sam

06/11/2020, 6:59 PM

Yes please that would be great

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