createFeatureSet example

    public function testProductFeaturesContainCorrectInformation(array $testedFeature, array $productData, array $expectedFeature): void
    {
        $this->createLanguage(self::TEST_LANGUAGE_ID);

        if ($testedFeature['type'] === ProductFeatureSetDefinition::TYPE_PRODUCT_CUSTOM_FIELD) {
            $this->createCustomField([]);
        }

        $this->createProduct([...[
            'featureSet' => $this->createFeatureSet([$testedFeature]),
        ], ...$productData]);

        $cart = $this->getProductCart();
        $lineItem = $cart->get($this->ids->get('product'));

        static::assertInstanceOf(LineItem::class, $lineItem);
        $features = $lineItem->getPayload()['features'];
        $feature = array_pop($features);

        static::assertArrayHasKey('label', $feature);
        static::assertArrayHasKey('value', $feature);