Custom validation rules

[salvisb]

Hi, I'm trying to check for custom validation rule existence, but it doesn't seem to work. Am I missing something?

// resource
Select::make(__('Primary language'), 'locales->primary')
  ...
  ->rules([
      ...,
      new LanguageMustNotOverlapRule(),
  ]),

// tests
$field = $this->resource->field('locales->primary');

$field->assertHasRule(LanguageMustNotOverlapRule::class);

Error: Failed asserting that an array contains 'Domain\Department\Nova\Rules\LanguageMustNotOverlapRule'.