Can't figure out why my asset behaves differently in tests vs live - maybe augmentation confusion?

[sunscreem]

In my tests I'm creating an asset and adding to my entry like this:

use Statamic\Facades\AssetContainer;
use Statamic\Facades\Asset;

  public function createPairsGame(String $type)
  {
    Storage::fake('local');
    AssetContainer::make('spaces')->disk('local')->save();
    $bgAsset = (new Asset)->container('spaces')->path('/assets/images/bg-2023.jpg');
    Entry::make()
            ->collection('pairs_game')
            ->slug('ipad-pairs-game')
            ->blueprint('ipad_pairs_game')
            ->data([
                'title' => fake()->text(),
                'main_background_image' => $bgAsset->path,
          
            ])
            ->save();
         }

The main_background_image is an asset field in the blueprint.

At first this seems to work - inside my controller I have:

ray($this->data());

Illuminate\Support\Collection {#4430▶
 #items: array:2 [▶
   "title" => "Qui illo totam soluta dolorem dolor consequatur sit. Id fuga dolor iste quia qui. Dolor sit sit voluptatem. Quisquam nesciunt voluptas omnis. Et esse ratione ut aliquid."
   "main_background_image" => "assets/images/bg-2023.jpg"
 ]
 #escapeWhenCastingToString: false
}

However calling ray($this->main_background_image) returns

null

This is not what I want. I want the actual Statamic\Assets\Asset returned.
Confusingly, for me, if I call ray($this->get('main_background_image') it gives me just the path:

assets/images/bg-2023.jpg

Now when I run ray($this->main_background_image) in a live environment, with actual data pulled from an actual entry, using the same blueprint:

Statamic\Assets\Asset#1
(
    [*:container] => Statamic\Assets\AssetContainer#2
    (
        [*:title] => 'Spaces'
        [*:handle] => 'spaces'
        [*:disk] => 'spaces'
        [*:private] => null
        [*:allowUploads] => true
        [*:allowDownloading] => null
        [*:allowMoving] => null
        [*:allowRenaming] => null
        [*:createFolders] => true
        [*:sourcePreset] => null
        [*:warmPresets] => null
        [*:searchIndex] => null
        [*:afterSaveCallbacks] => [],
        [*:withEvents] => true
        [*:sortField] => null
        [*:sortDirection] => null
        [*:initialPath] => null
    )
    [*:path] => 'pairs-game/bg-generic.jpg'
    [*:meta] => null
    [*:withEvents] => true
    [*:shouldHydrate] => true
    [*:removedData] => [],
    [*:original] => [    
        'path' => 'pairs-game/bg-generic.jpg',
        'data' => Statamic\Assets\PendingMeta#3
        (
            [*:key] => 'data'
        ),
    ]
    [*:data] => Illuminate\Support\Collection#4
    (
        [*:items] => [],
        [*:escapeWhenCastingToString] => false
    )
    [*:supplements] => Illuminate\Support\Collection#5
    (
        [*:items] => [],
        [*:escapeWhenCastingToString] => false
    )
    [*:selectedQueryColumns] => null
    [*:selectedQueryRelations] => [],
)

^^^ This is correct. I want the asset to be loaded - yay!

But I can't figure out why it's behaving different in my testing environment. It'll be related to how I set up the test I'm sure, but I'm stumped on this one.

[duncanmcclean]

In your blueprint, which asset container is the main_background_image field using? It'll need to be the same asset container you're using in your tests.

[sunscreem]

@duncanmcclean This wasn't the issue but you definitely set me on the right path...

In my tests setup I have $this->preventSavingStacheItemsToDisk(); which, of course, prevents the actual assetContainers being used. I'll get this reworked and re-open if I still can't get it to work.

Thanks