Testing custom transformers

[rpungello]

I have an application that relies on the PHP decimal extension for accurate decimal arithmetic, and have created a transformer to allow Decimal objects to be used as data properties.
I was looking to create a test for this transformer that verifies it is working correctly. I noticed the built-in transformers have tests, but they rely on a class (Spatie\LaravelData\Tests\Factories\FakeDataStructureFactory) that is seemingly not present on the release version of the package.

Is there a recommended way for package-specific transformers to be tested? Mainly how to create the DataProperty parameter required by the transform() function.

[rubenvanassche]

You can always do app(DataConfig::class)->getDataClass(YOUR DATA CLASS HERE) and then find the correct property within the structure. Or just copy this into your project:

laravel-data/tests/Factories/FakeDataStructureFactory.php

Line 21 in 174b6e5

class FakeDataStructureFactory