Test FieldCollectionFactory with empty list

composer.json

@@ -63,7 +63,7 @@
         "analyze": "@analyse",
         "cs-fix": "vendor/bin/php-cs-fixer fix --diff --verbose",
         "phpmd": "vendor/bin/phpmd src,tests text ruleset.xml",
-        "test": "vendor/bin/phpunit --testdox",
+        "test": "vendor/bin/phpunit --testdox --display-warnings",
         "test-coverage": [
             "Composer\\Config::disableProcessTimeout",
             "XDEBUG_MODE=coverage vendor/bin/phpunit --testdox --coverage-html=.build/coverage"

src/Factory/FieldCollectionFactory.php

@@ -27,14 +27,14 @@ public function __construct(
     }
 
     /**
-     * @param array{fields: array<string, mixed>} $jsonData
+     * @param array<string, mixed> $jsonData
      * @return FieldCollection
      */
     public function constructFromJson(array $jsonData): FieldCollection
     {
         $this->fieldCollectionBuilder->reset();
         /** @var array{alias: string, group: string, id: int, label: string, type: string, value: mixed} $fieldData */
-        foreach ($jsonData['fields'] as $fieldData) {
+        foreach ($jsonData as $fieldData) {
             $field = $this->fieldParser->parseFieldValue($fieldData);
             if (null === $field) {
                 continue;

src/Model/FieldCollection.php

@@ -9,9 +9,10 @@
 
 namespace JeckelLab\MauticWebhookParser\Model;
 
+use Countable;
 use JeckelLab\MauticWebhookParser\ValueObject\Field\Field;
 
-readonly class FieldCollection
+readonly class FieldCollection implements Countable
 {
     /**
      * @param array<string, Field> $fields
@@ -22,4 +23,9 @@ public function __get(string $name): ?Field
     {
         return $this->fields[$name] ?? null;
     }
+
+    public function count(): int
+    {
+        return count($this->fields);
+    }
 }

tests/Factory/FieldCollectionFactoryTest.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace JeckelLab\MauticWebhookParser\Tests\Factory;
+
+use JeckelLab\MauticWebhookParser\Factory\FieldCollectionFactory;
+use PHPUnit\Framework\TestCase;
+
+class FieldCollectionFactoryTest extends TestCase
+{
+    public function testFactoryWithEmptyArrayShouldReturnEmptyCollection(): void
+    {
+        $data = [];
+        $collection = (new FieldCollectionFactory())->constructFromJson($data);
+        self::assertCount(0, $collection);
+    }
+}