If I do ```someArb take 10 toList ``` and then feed it to da

Question

If I do ```someArb take 10 toList ``` and then feed it to data test s `forAll` it only makes me one test face with head bandage

sam · Answer

there s 200 data tests now

sam · Answer

which one are you using

dave08 · Answer

```suspend fun lt T Any gt ContainerContext forAll ts List lt T gt test suspend T gt Unit ```

sam · Answer

so the new one from 4 5+

dave08 · Answer

4 6

sam · Answer

what is toList doing

sam · Answer

is it making a list of t or a list of a single element of list t

dave08 · Answer

I guess converting the sequence from arb s take to a list

sam · Answer

here is a funky example

sam · Answer

```withData p q a gt withData listOf r s b gt withData sequenceOf x y c gt a + b + c shouldHaveLength 3 results add a + b + c ```

sam · Answer

so it should all be working

sam · Answer

The docs have been updated for 4 6 <https kotest io docs framework datatesting data driven testing html>

dave08 · Answer

I don t have withData I think I might have some kind of caching problem

dave08 · Answer

But Intellij shows me

sam · Answer

its in `kotest framework datatest`

sam · Answer

but that should be coming in automatically

sam · Answer

yeah its not

sam · Answer

damn that s an oversight

sam · Answer

I d add that module yourself

sam · Answer

the DD testing is way better now

sam · Answer

it does proper nesting and everything

dave08 · Answer

Well still the same problem still only have one sample generated

sam · Answer

what if you do `withData listOf 1 2 a gt `

dave08 · Answer

Puzzling I have to step out right now but I tried that using arb to generate to singles into a list and still got one test I m using instancePerLeaf and `it` inside the withData block

sam · Answer

try pasting it in exactly what I put just to rule out the data test framework

sam · Answer

instance per leaf might be the issue

sam · Answer

yes now I think about it it definitely is

dave08 · Answer

But I need it so that my test setup can be reinitialized is it supposed to work

sam · Answer

not for data tests

sam · Answer

as they re dynamic so it can t find them again on the next pass

dave08 · Answer

Well at least it should fail with a proper error message

sam · Answer

agreed

dave08 · Answer

PerTest would still work with data tests

dave08 · Answer

If so it could be suggested as a replacement in the error

sam · Answer

no that won t work either probably

sam · Answer

just single instance

dave08 · Answer

Oh Then it might be nice to have some kind of memoized construct like in spek To reinitialize setup since that s one of the reasons why i use InstancePerLeaf all the time

sam · Answer

it wouldn t help with data tests

sam · Answer

If you want to create a ticket I will look into what can be done for 5 0

dave08 · Answer

Ok I ll try to remember tomorrow when I get to work thanks

christophsturm · Answer

if each context invocation uses the same random seed it would always create the same tests that could be an easy fix

dave08 · Answer

< sam> Does `beforeTest` work with data tests

sam · Answer

Yes

dave08 · Answer

kotlin UninitializedPropertyAccessException lateinit property requestSequence has not been initialized

dave08 · Answer

```lateinit var requestSequence Sequence lt InitializeAccountRequest gt init isolationMode = IsolationMode SingleInstance describe Initialization of account beforeTest registrationState = setupRegistrationState RegistrationState arbValid single requestSequence = InitializeAccountRequest arb odooDevice id oroAccount id take 10 withData requestSequence request gt ```

sam · Answer

The nested before test might be causing a bug

sam · Answer

It should work I m afk atm will check soon

dave08 · Answer

Yeah when I take it out of describe it works

sam · Answer

Probably easy fix

dave08 · Answer

Can I use beforeContainer to setup before each data set

sam · Answer

Yes

dave08 · Answer

Oh boy I suppose that withData grabs all the values from the sequence BEFORE it runs the test

dave08 · Answer

Since it seems that when I assert the state of the repos in the lateinit var already change and they all fail

dave08 · Answer

So beforeContainer doesn t help at all in such a case

dave08 · Answer

And should withData contain `it`s or is it a test in itself < sam>

sam · Answer

withData makes the tests for you

sam · Answer

its basically like doing forEach with a test it inside

dave08 · Answer

Oh so asserting multiple named assertions isn t possible then I usually put the Arrange and Act in a `context` and Assert in a bunch of `it`s to verify multiple assertions on the state coming out of the Act

sam · Answer

you can add further nests tests

sam · Answer

```withData listOf 1 2 a gt context set me up it run me ```

dave08 · Answer

So basically the same as ```it context it ``` and that works

sam · Answer

well not tried it but I don t see why it wouldn t

dave08 · Answer

only when surrounded by `context` Also maybe that s what caused my previous problems <https kotlinlang slack com archives CT0G9SD7Z p1621951379106600 thread ts=1621871119 093600 amp cid=CT0G9SD7Z>

dave08 · Answer

the beforeContainer might not be doing the initialisation properly when doing that

dave08 · Answer

And w o nesting no it inside withData I get a funny lt init gt on a failing test

dave08 · Answer

Using < CAR7KJ96J|strikt> for assertions that seem to work nicely with kotest so far

sam · Answer

yes if you wanted to use them

sam · Answer

Kotest s assertions are richer

sam · Answer

you can use both together

dave08 · Answer

But why the lt init gt

sam · Answer

you might have an error outside of the test I don t knnow

sam · Answer

and yes withData will materialize the full list

dave08 · Answer

Which makes it impossible to use lateinit vars in the class s context with SingleInstance and still make sure they have the same state when asserting

sam · Answer

I think you can do what you want

dave08 · Answer

I m a bit stuck with the setup part here face with head bandage

sam · Answer

Do you have a full example

dave08 · Answer

I ll try to DM part of it