Fix flaky test

[stuebingerb]

DataLoaderTest > multiple layers of data loaders() FAILED
    org.opentest4j.AssertionFailedError at DataLoaderTest.kt:656

This might also become a "fix incorrect dataloader implementation" task.

[stuebingerb]

From a failed run:

DataLoaderTest > multiple layers of data loaders() FAILED
    org.opentest4j.AssertionFailedError: expected:<6> but was:<4>
        at app//com.apurebase.kgraphql.DataLoaderTest.multiple_layers_of_data_loaders$lambda$0(DataLoaderTest.kt:656)

Having fewer invocations is completely unexpected.

[stuebingerb]

Standard out from some runs:

Failed run 1:
DataLoaderTest > multiple layers of data loaders() STANDARD_OUT
    == Running [B] loader with keys: [Testing 1, Testing 2, Testing 3] ==
    == Running [children] loader with keys: [Testing 1, Testing 2, Testing 3] ==
    == Running [B] loader with keys: [Buzz, Høgni, Fizz, World, Jógvan, Hello] ==
    == Running [children] loader with keys: [Høgni, Buzz, Fizz, World, Jógvan, Hello] ==
    == Running [children] loader with keys: [HøgniNest-1, HøgniNest-0, BuzzNest-1, BuzzNest-0, HelloNest-1, HelloNest-0, FizzNest-1, WorldNest-1, WorldNest-0, JógvanNest-0, JógvanNest-1, FizzNest-0] ==
    == Running [children] loader with keys: [HøgniNest-1Nest-1, HøgniNest-1Nest-0, JógvanNest-1Nest-1, JógvanNest-1Nest-0, FizzNest-0Nest-1, FizzNest-0Nest-0, HøgniNest-0Nest-0, HøgniNest-0Nest-1, BuzzNest-1Nest-0, BuzzNest-1Nest-1, BuzzNest-0Nest-1, BuzzNest-0Nest-0, HelloNest-1Nest-1, HelloNest-1Nest-0, HelloNest-0Nest-1, FizzNest-1Nest-1, WorldNest-1Nest-1, HelloNest-0Nest-0, WorldNest-0Nest-1, FizzNest-1Nest-0, WorldNest-1Nest-0, WorldNest-0Nest-0, JógvanNest-0Nest-1, JógvanNest-0Nest-0] ==
    == Running [B] loader with keys: [HøgniNest-1, HøgniNest-0, BuzzNest-1, BuzzNest-0, HelloNest-1, HelloNest-0, FizzNest-1, WorldNest-1, WorldNest-0, JógvanNest-0, JógvanNest-1, FizzNest-0, HøgniNest-1Nest-0, HøgniNest-1Nest-1, JógvanNest-1Nest-1, FizzNest-0Nest-1, JógvanNest-1Nest-0, FizzNest-0Nest-0, HøgniNest-0Nest-1, HøgniNest-0Nest-0, BuzzNest-1Nest-1, BuzzNest-1Nest-0, BuzzNest-0Nest-1, BuzzNest-0Nest-0, HelloNest-1Nest-1, HelloNest-1Nest-0, HelloNest-0Nest-0, HelloNest-0Nest-1, FizzNest-1Nest-1, FizzNest-1Nest-0, WorldNest-1Nest-0, WorldNest-1Nest-1, WorldNest-0Nest-1, WorldNest-0Nest-0, JógvanNest-0Nest-0, JógvanNest-0Nest-1] ==
    == Running [B] loader with keys: [HøgniNest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-0, JógvanNest-1Nest-1Nest-1, HøgniNest-1Nest-1Nest-0, JógvanNest-1Nest-0Nest-1, FizzNest-0Nest-0Nest-1, FizzNest-0Nest-0Nest-0, FizzNest-0Nest-1Nest-1, BuzzNest-1Nest-1Nest-1, JógvanNest-1Nest-0Nest-0, HøgniNest-0Nest-0Nest-0, HøgniNest-0Nest-0Nest-1, BuzzNest-1Nest-1Nest-0, HelloNest-0Nest-1Nest-0, FizzNest-1Nest-1Nest-0, FizzNest-1Nest-1Nest-1, BuzzNest-0Nest-0Nest-1, BuzzNest-0Nest-1Nest-1, FizzNest-0Nest-1Nest-0, HøgniNest-0Nest-1Nest-1, HøgniNest-0Nest-1Nest-0, BuzzNest-1Nest-0Nest-1, HelloNest-1Nest-0Nest-1, HelloNest-1Nest-1Nest-1, WorldNest-0Nest-1Nest-1, WorldNest-0Nest-1Nest-0, HelloNest-0Nest-1Nest-1, BuzzNest-0Nest-1Nest-0, HøgniNest-1Nest-0Nest-1, BuzzNest-0Nest-0Nest-0, WorldNest-1Nest-0Nest-0, WorldNest-1Nest-0Nest-1, WorldNest-1Nest-1Nest-1, JógvanNest-0Nest-1Nest-1, WorldNest-1Nest-1Nest-0, HelloNest-0Nest-0Nest-1, JógvanNest-0Nest-1Nest-0, JógvanNest-0Nest-0Nest-1, FizzNest-1Nest-0Nest-1, FizzNest-1Nest-0Nest-0, HelloNest-0Nest-0Nest-0, BuzzNest-1Nest-0Nest-0, WorldNest-0Nest-0Nest-1, HøgniNest-1Nest-0Nest-0, HelloNest-1Nest-1Nest-0, HelloNest-1Nest-0Nest-0, WorldNest-0Nest-0Nest-0, JógvanNest-0Nest-0Nest-0] ==
    == Running [children] loader with keys: [HøgniNest-1Nest-1Nest-0, HøgniNest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-0, JógvanNest-1Nest-0Nest-0, JógvanNest-1Nest-0Nest-1, FizzNest-0Nest-1Nest-1, FizzNest-0Nest-1Nest-0, FizzNest-0Nest-0Nest-1, FizzNest-0Nest-0Nest-0, HøgniNest-0Nest-0Nest-1, HøgniNest-0Nest-0Nest-0, BuzzNest-1Nest-1Nest-1, BuzzNest-1Nest-1Nest-0, BuzzNest-0Nest-1Nest-1, BuzzNest-0Nest-1Nest-0, BuzzNest-0Nest-0Nest-1, BuzzNest-0Nest-0Nest-0, HøgniNest-1Nest-0Nest-1, HelloNest-1Nest-1Nest-1, HøgniNest-0Nest-1Nest-1, HelloNest-1Nest-0Nest-1, HelloNest-1Nest-0Nest-0, HelloNest-0Nest-1Nest-0, HelloNest-0Nest-1Nest-1, FizzNest-1Nest-1Nest-1, FizzNest-1Nest-1Nest-0, HelloNest-1Nest-1Nest-0, WorldNest-1Nest-1Nest-1, WorldNest-0Nest-1Nest-1, HøgniNest-0Nest-1Nest-0, BuzzNest-1Nest-0Nest-1, WorldNest-0Nest-1Nest-0, FizzNest-1Nest-0Nest-1, WorldNest-1Nest-0Nest-1, FizzNest-1Nest-0Nest-0, WorldNest-1Nest-1Nest-0, WorldNest-1Nest-0Nest-0, HelloNest-0Nest-0Nest-1, HelloNest-0Nest-0Nest-0, JógvanNest-0Nest-1Nest-0, JógvanNest-0Nest-1Nest-1, JógvanNest-0Nest-0Nest-0, WorldNest-0Nest-0Nest-1, WorldNest-0Nest-0Nest-0, JógvanNest-0Nest-0Nest-1, BuzzNest-1Nest-0Nest-0, HøgniNest-1Nest-0Nest-0] ==
    == Running [B] loader with keys: [HøgniNest-1Nest-1Nest-0Nest-0, HøgniNest-1Nest-1Nest-0Nest-1, HøgniNest-1Nest-1Nest-1Nest-0, HøgniNest-1Nest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-1Nest-0, JógvanNest-1Nest-1Nest-0Nest-1, JógvanNest-1Nest-1Nest-0Nest-0, JógvanNest-1Nest-0Nest-0Nest-1, JógvanNest-1Nest-0Nest-0Nest-0, JógvanNest-1Nest-0Nest-1Nest-1, JógvanNest-1Nest-0Nest-1Nest-0, FizzNest-0Nest-1Nest-1Nest-1, FizzNest-0Nest-1Nest-1Nest-0, FizzNest-0Nest-1Nest-0Nest-1, FizzNest-0Nest-1Nest-0Nest-0, FizzNest-0Nest-0Nest-1Nest-1, FizzNest-0Nest-0Nest-1Nest-0, FizzNest-0Nest-0Nest-0Nest-1, FizzNest-0Nest-0Nest-0Nest-0, HøgniNest-0Nest-0Nest-1Nest-1, HøgniNest-0Nest-0Nest-1Nest-0, BuzzNest-1Nest-1Nest-1Nest-1, BuzzNest-1Nest-1Nest-1Nest-0, HøgniNest-0Nest-0Nest-0Nest-1, HøgniNest-0Nest-0Nest-0Nest-0, BuzzNest-1Nest-1Nest-0Nest-1, BuzzNest-1Nest-1Nest-0Nest-0, BuzzNest-0Nest-1Nest-1Nest-0, BuzzNest-0Nest-1Nest-1Nest-1, BuzzNest-0Nest-1Nest-0Nest-1, BuzzNest-0Nest-1Nest-0Nest-0, BuzzNest-0Nest-0Nest-1Nest-0, BuzzNest-0Nest-0Nest-1Nest-1, BuzzNest-0Nest-0Nest-0Nest-1, BuzzNest-0Nest-0Nest-0Nest-0, HøgniNest-1Nest-0Nest-1Nest-1, HøgniNest-1Nest-0Nest-1Nest-0, HelloNest-1Nest-1Nest-1Nest-0, HelloNest-1Nest-1Nest-1Nest-1, HøgniNest-0Nest-1Nest-1Nest-1, HøgniNest-0Nest-1Nest-1Nest-0, HelloNest-1Nest-0Nest-1Nest-1, HelloNest-1Nest-0Nest-1Nest-0, HelloNest-1Nest-0Nest-0Nest-1, HelloNest-1Nest-0Nest-0Nest-0, HelloNest-0Nest-1Nest-0Nest-1, HelloNest-0Nest-1Nest-0Nest-0, HelloNest-0Nest-1Nest-1Nest-0, HelloNest-0Nest-1Nest-1Nest-1, FizzNest-1Nest-1Nest-1Nest-0, FizzNest-1Nest-1Nest-1Nest-1, FizzNest-1Nest-1Nest-0Nest-1, FizzNest-1Nest-1Nest-0Nest-0, HelloNest-1Nest-1Nest-0Nest-1, HelloNest-1Nest-1Nest-0Nest-0, WorldNest-1Nest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-1Nest-0, WorldNest-0Nest-1Nest-1Nest-1, WorldNest-0Nest-1Nest-1Nest-0, HøgniNest-0Nest-1Nest-0Nest-0, HøgniNest-0Nest-1Nest-0Nest-1, BuzzNest-1Nest-0Nest-1Nest-1, BuzzNest-1Nest-0Nest-1Nest-0, WorldNest-0Nest-1Nest-0Nest-0, WorldNest-0Nest-1Nest-0Nest-1, FizzNest-1Nest-0Nest-1Nest-0, FizzNest-1Nest-0Nest-1Nest-1, WorldNest-1Nest-0Nest-1Nest-1, WorldNest-1Nest-0Nest-1Nest-0, FizzNest-1Nest-0Nest-0Nest-1, FizzNest-1Nest-0Nest-0Nest-0, WorldNest-1Nest-1Nest-0Nest-1, WorldNest-1Nest-1Nest-0Nest-0, WorldNest-1Nest-0Nest-0Nest-1, WorldNest-1Nest-0Nest-0Nest-0, HelloNest-0Nest-0Nest-1Nest-1, HelloNest-0Nest-0Nest-1Nest-0, HelloNest-0Nest-0Nest-0Nest-1, JógvanNest-0Nest-1Nest-0Nest-1, JógvanNest-0Nest-1Nest-0Nest-0, HelloNest-0Nest-0Nest-0Nest-0, JógvanNest-0Nest-1Nest-1Nest-1, JógvanNest-0Nest-1Nest-1Nest-0, WorldNest-0Nest-0Nest-1Nest-1, WorldNest-0Nest-0Nest-1Nest-0, JógvanNest-0Nest-0Nest-0Nest-1, JógvanNest-0Nest-0Nest-0Nest-0, WorldNest-0Nest-0Nest-0Nest-1, WorldNest-0Nest-0Nest-0Nest-0, JógvanNest-0Nest-0Nest-1Nest-0, JógvanNest-0Nest-0Nest-1Nest-1, BuzzNest-1Nest-0Nest-0Nest-1, BuzzNest-1Nest-0Nest-0Nest-0, HøgniNest-1Nest-0Nest-0Nest-1, HøgniNest-1Nest-0Nest-0Nest-0] ==

Failed run 2:
DataLoaderTest > multiple layers of data loaders() STANDARD_OUT
    == Running [B] loader with keys: [Testing 1, Testing 3, Testing 2] ==
    == Running [children] loader with keys: [Testing 3, Testing 2, Testing 1] ==
    == Running [children] loader with keys: [World, Buzz, Høgni, Jógvan, Hello, Fizz] ==
    == Running [B] loader with keys: [Hello, World, Buzz, Høgni, Fizz, Jógvan] ==
    == Running [children] loader with keys: [WorldNest-1, WorldNest-0, FizzNest-1, BuzzNest-0, BuzzNest-1, HøgniNest-0, HøgniNest-1, JógvanNest-1, JógvanNest-0, HelloNest-1, HelloNest-0, FizzNest-0] ==
    == Running [children] loader with keys: [WorldNest-1Nest-1, WorldNest-1Nest-0, FizzNest-0Nest-0, FizzNest-0Nest-1, HelloNest-0Nest-1, HelloNest-0Nest-0, WorldNest-0Nest-0, WorldNest-0Nest-1, FizzNest-1Nest-1, FizzNest-1Nest-0, BuzzNest-0Nest-0, BuzzNest-0Nest-1, BuzzNest-1Nest-1, BuzzNest-1Nest-0, HøgniNest-0Nest-0, HøgniNest-0Nest-1, HøgniNest-1Nest-0, HøgniNest-1Nest-1, HelloNest-1Nest-1, JógvanNest-1Nest-1, JógvanNest-1Nest-0, JógvanNest-0Nest-0, JógvanNest-0Nest-1, HelloNest-1Nest-0] ==
    == Running [B] loader with keys: [WorldNest-1, WorldNest-0, BuzzNest-0, BuzzNest-1, HøgniNest-0, HøgniNest-1, JógvanNest-1, JógvanNest-0, HelloNest-1, HelloNest-0, FizzNest-0, FizzNest-1, WorldNest-1Nest-1, WorldNest-1Nest-0, HelloNest-0Nest-1, HelloNest-0Nest-0, FizzNest-0Nest-1, FizzNest-0Nest-0, WorldNest-0Nest-1, WorldNest-0Nest-0, FizzNest-1Nest-0, FizzNest-1Nest-1, BuzzNest-0Nest-1, BuzzNest-0Nest-0, BuzzNest-1Nest-1, BuzzNest-1Nest-0, HøgniNest-0Nest-1, HøgniNest-0Nest-0, HøgniNest-1Nest-1, HøgniNest-1Nest-0, JógvanNest-1Nest-0, JógvanNest-1Nest-1, JógvanNest-0Nest-0, JógvanNest-0Nest-1, HelloNest-1Nest-1, HelloNest-1Nest-0] ==
    == Running [B] loader with keys: [WorldNest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-0, FizzNest-0Nest-1Nest-1, FizzNest-0Nest-0Nest-0, FizzNest-0Nest-0Nest-1, FizzNest-0Nest-1Nest-0, HelloNest-0Nest-1Nest-1, WorldNest-0Nest-1Nest-1, WorldNest-0Nest-0Nest-0, HelloNest-0Nest-1Nest-0, WorldNest-0Nest-0Nest-1, FizzNest-1Nest-1Nest-1, HelloNest-0Nest-0Nest-1, HelloNest-0Nest-0Nest-0, BuzzNest-0Nest-0Nest-1, BuzzNest-0Nest-0Nest-0, BuzzNest-0Nest-1Nest-1, FizzNest-1Nest-0Nest-1, FizzNest-1Nest-0Nest-0, BuzzNest-1Nest-1Nest-1, HøgniNest-1Nest-1Nest-1, BuzzNest-1Nest-0Nest-0, BuzzNest-1Nest-0Nest-1, HøgniNest-0Nest-1Nest-0, WorldNest-1Nest-0Nest-1, HøgniNest-1Nest-0Nest-1, HøgniNest-1Nest-0Nest-0, HøgniNest-1Nest-1Nest-0, BuzzNest-0Nest-1Nest-0, FizzNest-1Nest-1Nest-0, HøgniNest-0Nest-1Nest-1, JógvanNest-0Nest-0Nest-1, JógvanNest-0Nest-1Nest-0, JógvanNest-1Nest-1Nest-1, HelloNest-1Nest-0Nest-1, HøgniNest-0Nest-0Nest-1, JógvanNest-1Nest-0Nest-0, JógvanNest-1Nest-1Nest-0, JógvanNest-0Nest-1Nest-1, JógvanNest-1Nest-0Ne
    == Running [children] loader with keys: [WorldNest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-0, FizzNest-0Nest-0Nest-0, FizzNest-0Nest-1Nest-0, FizzNest-0Nest-1Nest-1, FizzNest-0Nest-0Nest-1, HelloNest-0Nest-1Nest-0, HelloNest-0Nest-1Nest-1, WorldNest-0Nest-0Nest-0, HelloNest-0Nest-0Nest-1, WorldNest-0Nest-0Nest-1, FizzNest-1Nest-1Nest-0, FizzNest-1Nest-0Nest-0, WorldNest-0Nest-1Nest-0, HelloNest-0Nest-0Nest-0, WorldNest-1Nest-0Nest-1, WorldNest-0Nest-1Nest-1, BuzzNest-0Nest-0Nest-0, BuzzNest-0Nest-1Nest-1, BuzzNest-0Nest-1Nest-0, FizzNest-1Nest-0Nest-1, BuzzNest-0Nest-0Nest-1, FizzNest-1Nest-1Nest-1, BuzzNest-1Nest-0Nest-1, BuzzNest-1Nest-0Nest-0, HøgniNest-0Nest-1Nest-1, BuzzNest-1Nest-1Nest-0, HøgniNest-1Nest-1Nest-1, HøgniNest-1Nest-1Nest-0, HøgniNest-0Nest-0Nest-0, HøgniNest-0Nest-1Nest-0, BuzzNest-1Nest-1Nest-1, HøgniNest-1Nest-0Nest-1, HøgniNest-1Nest-0Nest-0, HøgniNest-0Nest-0Nest-1, JógvanNest-0Nest-0Nest-1, JógvanNest-0Nest-0Nest-0, JógvanNest-0Nest-1Nest-1, HelloNest-1Nest-1Nest-1, HelloNest-1Nest-1
    == Running [B] loader with keys: [WorldNest-1Nest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-1Nest-0, WorldNest-1Nest-1Nest-0Nest-1, WorldNest-1Nest-1Nest-0Nest-0, FizzNest-0Nest-0Nest-0Nest-1, FizzNest-0Nest-0Nest-0Nest-0, FizzNest-0Nest-1Nest-0Nest-1, FizzNest-0Nest-1Nest-0Nest-0, FizzNest-0Nest-1Nest-1Nest-1, FizzNest-0Nest-1Nest-1Nest-0, FizzNest-0Nest-0Nest-1Nest-1, FizzNest-0Nest-0Nest-1Nest-0, HelloNest-0Nest-1Nest-0Nest-0, HelloNest-0Nest-1Nest-0Nest-1, HelloNest-0Nest-1Nest-1Nest-1, HelloNest-0Nest-1Nest-1Nest-0, WorldNest-0Nest-0Nest-0Nest-0, HelloNest-0Nest-0Nest-1Nest-1, HelloNest-0Nest-0Nest-1Nest-0, WorldNest-0Nest-0Nest-0Nest-1, WorldNest-0Nest-0Nest-1Nest-0, WorldNest-0Nest-0Nest-1Nest-1, FizzNest-1Nest-1Nest-0Nest-1, FizzNest-1Nest-1Nest-0Nest-0, FizzNest-1Nest-0Nest-0Nest-1, FizzNest-1Nest-0Nest-0Nest-0, WorldNest-0Nest-1Nest-0Nest-1, WorldNest-0Nest-1Nest-0Nest-0, HelloNest-0Nest-0Nest-0Nest-1, HelloNest-0Nest-0Nest-0Nest-0, WorldNest-1Nest-0Nest-1Nest-1, WorldNest-1Nest-0Nest-1Nest-0, WorldN

Successful run:
DataLoaderTest > multiple layers of data loaders() STANDARD_OUT
    == Running [children] loader with keys: [Testing 3, Testing 1, Testing 2] ==
    == Running [B] loader with keys: [Testing 2, Testing 1, Testing 3] ==
    == Running [children] loader with keys: [Høgni, Buzz, Fizz, World, Jógvan, Hello] ==
    == Running [B] loader with keys: [Høgni, Buzz, Jógvan, Hello, World, Fizz] ==
    == Running [B] loader with keys: [HøgniNest-1, HøgniNest-0, BuzzNest-1, FizzNest-1, FizzNest-0, WorldNest-1, WorldNest-0, JógvanNest-0, JógvanNest-1, HelloNest-1, HelloNest-0, BuzzNest-0] ==
    == Running [children] loader with keys: [HøgniNest-1, HøgniNest-0, HelloNest-1, BuzzNest-1, BuzzNest-0, FizzNest-1, FizzNest-0, WorldNest-1, WorldNest-0, JógvanNest-1, JógvanNest-0, HelloNest-0] ==
    == Running [B] loader with keys: [HøgniNest-1Nest-0, HøgniNest-1Nest-1, JógvanNest-0Nest-1, HelloNest-0Nest-0, HelloNest-0Nest-1, JógvanNest-0Nest-0, HøgniNest-0Nest-0, HøgniNest-0Nest-1, HelloNest-1Nest-1, HelloNest-1Nest-0, BuzzNest-1Nest-0, BuzzNest-1Nest-1, BuzzNest-0Nest-1, BuzzNest-0Nest-0, FizzNest-1Nest-1, FizzNest-1Nest-0, FizzNest-0Nest-1, FizzNest-0Nest-0, WorldNest-1Nest-0, WorldNest-1Nest-1, WorldNest-0Nest-1, WorldNest-0Nest-0, JógvanNest-1Nest-1, JógvanNest-1Nest-0] ==
    == Running [children] loader with keys: [HøgniNest-1Nest-1, HøgniNest-1Nest-0, JógvanNest-0Nest-1, HelloNest-0Nest-1, HelloNest-0Nest-0, JógvanNest-0Nest-0, HøgniNest-0Nest-0, HøgniNest-0Nest-1, HelloNest-1Nest-1, HelloNest-1Nest-0, BuzzNest-1Nest-1, BuzzNest-1Nest-0, BuzzNest-0Nest-1, BuzzNest-0Nest-0, FizzNest-1Nest-1, FizzNest-1Nest-0, WorldNest-1Nest-1, WorldNest-0Nest-1, JógvanNest-1Nest-1, FizzNest-0Nest-0, FizzNest-0Nest-1, WorldNest-1Nest-0, WorldNest-0Nest-0, JógvanNest-1Nest-0] ==
    == Running [B] loader with keys: [HøgniNest-1Nest-1Nest-1, JógvanNest-0Nest-1Nest-0, JógvanNest-0Nest-1Nest-1, HelloNest-0Nest-1Nest-1, HelloNest-0Nest-1Nest-0, HøgniNest-1Nest-1Nest-0, HøgniNest-0Nest-0Nest-0, HelloNest-0Nest-0Nest-1, HøgniNest-1Nest-0Nest-1, JógvanNest-0Nest-0Nest-1, HelloNest-0Nest-0Nest-0, HøgniNest-0Nest-0Nest-1, HelloNest-1Nest-0Nest-1, HøgniNest-0Nest-1Nest-1, BuzzNest-1Nest-1Nest-1, HøgniNest-0Nest-1Nest-0, BuzzNest-1Nest-1Nest-0, BuzzNest-0Nest-1Nest-1, BuzzNest-0Nest-1Nest-0, FizzNest-1Nest-0Nest-1, FizzNest-1Nest-0Nest-0, HelloNest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-0, BuzzNest-1Nest-0Nest-1, JógvanNest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-0, BuzzNest-0Nest-0Nest-1, JógvanNest-0Nest-0Nest-0, FizzNest-1Nest-1Nest-1, FizzNest-1Nest-1Nest-0, WorldNest-0Nest-0Nest-1, WorldNest-0Nest-1Nest-1, WorldNest-0Nest-0Nest-0, BuzzNest-1Nest-0Nest-0, JógvanNest-1Nest-0Nest-1, FizzNest-0Nest-1Nest-1, WorldNest-1Nest-0Nest-1, WorldNest-1Nest-0Nest-0, HelloNest-1Nest-1Nest-0, FizzNest-0Nest-1Nest-0, WorldNest-0Nest-1Nest-0, JógvanNest-1Nest-0Nest-0, HøgniNest-1Nest-0Nest-0, HelloNest-1Nest-0Nest-0, BuzzNest-0Nest-0Nest-0, FizzNest-0Nest-0Nest-1, FizzNest-0Nest-0Nest-0] ==
    == Running [children] loader with keys: [HøgniNest-1Nest-1Nest-1, HøgniNest-1Nest-1Nest-0, JógvanNest-0Nest-1Nest-0, JógvanNest-0Nest-1Nest-1, HelloNest-0Nest-1Nest-1, HelloNest-0Nest-1Nest-0, HelloNest-0Nest-0Nest-0, HøgniNest-0Nest-0Nest-1, HøgniNest-0Nest-0Nest-0, JógvanNest-0Nest-0Nest-1, HelloNest-0Nest-0Nest-1, HøgniNest-0Nest-1Nest-1, HøgniNest-1Nest-0Nest-1, HelloNest-1Nest-0Nest-1, JógvanNest-0Nest-0Nest-0, BuzzNest-1Nest-1Nest-1, BuzzNest-1Nest-1Nest-0, HøgniNest-0Nest-1Nest-0, BuzzNest-1Nest-0Nest-1, HelloNest-1Nest-1Nest-1, BuzzNest-1Nest-0Nest-0, BuzzNest-0Nest-1Nest-0, BuzzNest-0Nest-1Nest-1, BuzzNest-0Nest-0Nest-1, BuzzNest-0Nest-0Nest-0, HelloNest-1Nest-0Nest-0, WorldNest-0Nest-1Nest-1, FizzNest-1Nest-0Nest-1, FizzNest-1Nest-0Nest-0, HelloNest-1Nest-1Nest-0, WorldNest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-0, FizzNest-0Nest-0Nest-0, FizzNest-0Nest-0Nest-1, FizzNest-0Nest-1Nest-0, FizzNest-0Nest-1Nest-1, FizzNest-1Nest-1Nest-1, FizzNest-1Nest-1Nest-0, JógvanNest-1Nest-0Nest-0, JógvanNest-1Nest-0Nest-1, WorldNest-0Nest-1Nest-0, JógvanNest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-0, WorldNest-0Nest-0Nest-1, WorldNest-0Nest-0Nest-0, WorldNest-1Nest-0Nest-1, WorldNest-1Nest-0Nest-0, HøgniNest-1Nest-0Nest-0] ==
    == Running [B] loader with keys: [HøgniNest-1Nest-1Nest-1Nest-0, HøgniNest-1Nest-1Nest-1Nest-1, HøgniNest-1Nest-1Nest-0Nest-1, HøgniNest-1Nest-1Nest-0Nest-0, JógvanNest-0Nest-1Nest-0Nest-1, JógvanNest-0Nest-1Nest-0Nest-0, JógvanNest-0Nest-1Nest-1Nest-0, JógvanNest-0Nest-1Nest-1Nest-1, HelloNest-0Nest-1Nest-1Nest-1, HelloNest-0Nest-1Nest-1Nest-0, HelloNest-0Nest-1Nest-0Nest-1, HelloNest-0Nest-1Nest-0Nest-0, HøgniNest-0Nest-0Nest-1Nest-0, HøgniNest-0Nest-0Nest-1Nest-1, HelloNest-0Nest-0Nest-0Nest-0, HelloNest-0Nest-0Nest-0Nest-1, HøgniNest-0Nest-0Nest-0Nest-1, JógvanNest-0Nest-0Nest-1Nest-1, JógvanNest-0Nest-0Nest-1Nest-0, HøgniNest-0Nest-0Nest-0Nest-0, HelloNest-0Nest-0Nest-1Nest-0, HelloNest-0Nest-0Nest-1Nest-1, HøgniNest-0Nest-1Nest-1Nest-0, HøgniNest-0Nest-1Nest-1Nest-1, HøgniNest-1Nest-0Nest-1Nest-0, HøgniNest-1Nest-0Nest-1Nest-1, HelloNest-1Nest-0Nest-1Nest-1, HelloNest-1Nest-0Nest-1Nest-0, JógvanNest-0Nest-0Nest-0Nest-0, JógvanNest-0Nest-0Nest-0Nest-1, BuzzNest-1Nest-1Nest-1Nest-0, BuzzNest-1Nest-1Nest-1Nest-1, BuzzNest-1Nest-1Nest-0Nest-0, BuzzNest-1Nest-1Nest-0Nest-1, HøgniNest-0Nest-1Nest-0Nest-0, HøgniNest-0Nest-1Nest-0Nest-1, BuzzNest-1Nest-0Nest-1Nest-0, BuzzNest-1Nest-0Nest-1Nest-1, HelloNest-1Nest-1Nest-1Nest-1, HelloNest-1Nest-1Nest-1Nest-0, BuzzNest-1Nest-0Nest-0Nest-1, BuzzNest-1Nest-0Nest-0Nest-0, BuzzNest-0Nest-1Nest-0Nest-0, BuzzNest-0Nest-1Nest-0Nest-1, BuzzNest-0Nest-1Nest-1Nest-1, BuzzNest-0Nest-1Nest-1Nest-0, BuzzNest-0Nest-0Nest-1Nest-1, BuzzNest-0Nest-0Nest-1Nest-0, BuzzNest-0Nest-0Nest-0Nest-1, BuzzNest-0Nest-0Nest-0Nest-0, HelloNest-1Nest-0Nest-0Nest-0, HelloNest-1Nest-0Nest-0Nest-1, WorldNest-0Nest-1Nest-1Nest-1, WorldNest-0Nest-1Nest-1Nest-0, FizzNest-1Nest-0Nest-1Nest-1, FizzNest-1Nest-0Nest-1Nest-0, FizzNest-1Nest-0Nest-0Nest-1, FizzNest-1Nest-0Nest-0Nest-0, HelloNest-1Nest-1Nest-0Nest-1, HelloNest-1Nest-1Nest-0Nest-0, WorldNest-1Nest-1Nest-1Nest-1, WorldNest-1Nest-1Nest-1Nest-0, WorldNest-1Nest-1Nest-0Nest-1, WorldNest-1Nest-1Nest-0Nest-0, FizzNest-0Nest-0Nest-0Nest-1, FizzNest-0Nest-0Nest-0Nest-0, FizzNest-0Nest-0Nest-1Nest-0, FizzNest-0Nest-0Nest-1Nest-1, FizzNest-0Nest-1Nest-0Nest-1, FizzNest-0Nest-1Nest-0Nest-0, FizzNest-0Nest-1Nest-1Nest-1, FizzNest-0Nest-1Nest-1Nest-0, FizzNest-1Nest-1Nest-1Nest-1, FizzNest-1Nest-1Nest-1Nest-0, FizzNest-1Nest-1Nest-0Nest-0, FizzNest-1Nest-1Nest-0Nest-1, JógvanNest-1Nest-0Nest-0Nest-0, JógvanNest-1Nest-0Nest-1Nest-1, JógvanNest-1Nest-0Nest-0Nest-1, JógvanNest-1Nest-0Nest-1Nest-0, WorldNest-0Nest-1Nest-0Nest-1, WorldNest-0Nest-1Nest-0Nest-0, JógvanNest-1Nest-1Nest-1Nest-1, JógvanNest-1Nest-1Nest-1Nest-0, JógvanNest-1Nest-1Nest-0Nest-1, JógvanNest-1Nest-1Nest-0Nest-0, WorldNest-0Nest-0Nest-1Nest-0, WorldNest-0Nest-0Nest-1Nest-1, WorldNest-0Nest-0Nest-0Nest-1, WorldNest-0Nest-0Nest-0Nest-0, WorldNest-1Nest-0Nest-1Nest-0, WorldNest-1Nest-0Nest-1Nest-1, WorldNest-1Nest-0Nest-0Nest-1, WorldNest-1Nest-0Nest-0Nest-0, HøgniNest-1Nest-0Nest-0Nest-1, HøgniNest-1Nest-0Nest-0Nest-0] ==

[stuebingerb]

Initial test seems to be a lot more stable now, but there is a new candidate:

VariablesSpecificationTest > required variable arrays() FAILED
    com.apurebase.kgraphql.ExecutionException: Index 1 out of bounds for length 0
        at app//com.apurebase.kgraphql.schema.execution.ParallelRequestExecutor$invoke$1.invokeSuspend(ParallelRequestExecutor.kt:485)
        at app//kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
        at app//kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
        at app//kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:586)
        at app//kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:829)
        at app//kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:717)
        at app//kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:704)

        Caused by:
        java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 0
            at java.base/java.util.ArrayList.add(ArrayList.java:455)
            at java.base/java.util.ArrayList.add(ArrayList.java:467)
            at com.apurebase.kgraphql.integration.BaseSchemaTest$testedSchema$1$22$1.invokeSuspend(BaseSchemaTest.kt:215)
            at com.apurebase.kgraphql.integration.BaseSchemaTest$testedSchema$1$22$1.invoke(BaseSchemaTest.kt)
            at com.apurebase.kgraphql.integration.BaseSchemaTest$testedSchema$1$22$1.invoke(BaseSchemaTest.kt)
            at com.apurebase.kgraphql.schema.model.FunctionWrapper$ArityTwo.invoke(FunctionWrapper.kt:246)
            at com.apurebase.kgraphql.schema.model.BaseOperationDef.invoke(BaseOperationDef.kt)
            at com.apurebase.kgraphql.schema.structure.Field$Function.invoke(Field.kt)
            at com.apurebase.kgraphql.schema.execution.ParallelRequestExecutor$invoke$1.invokeSuspend(ParallelRequestExecutor.kt:479)
            ... 6 more

[stuebingerb]

The failing VariablesSpecificationTest can IMO only occur for concurrent modification of the same list, and could be a valid reason for why mutations in GraphQL should use serial execution (cf. https://spec.graphql.org/September2025/#sec-Normal-and-Serial-Execution) - #516.