Testing transformers is fairly straightforward.
Here's a quick example. Note that we can use Laravel's Http facade to fake the response of the external API.
use App\Transformers\SummaryTransformer;
use Spatie\LaravelUrlAiTransformer\Support\Transform;
use Spatie\LaravelUrlAiTransformer\Models\TransformationResult;
use Illuminate\Support\Facades\Http;
it('generates summaries for articles', function () {
Http::fake([
'https://example.com/article' => Http::response('<html><body>Test article content</body></html>'),
]);
Transform::urls('https://example.com/article')
->usingTransformers(new SummaryTransformer);
$this->artisan('transform-urls --now');
$summary = TransformationResult::forUrl(
'https://example.com/article',
'summary'
);
expect($summary)->not->toBeNull();
expect($summary)->toContain('•');
});