Fix: Allow objects without properties

src/Bridge/Symfony/PropertyInfo/Metadata/Property/PropertyInfoPropertyNameCollectionFactory.php

@@ -13,7 +13,6 @@
 
 namespace ApiPlatform\Core\Bridge\Symfony\PropertyInfo\Metadata\Property;
 
-use ApiPlatform\Core\Exception\RuntimeException;
 use ApiPlatform\Core\Metadata\Property\Factory\PropertyNameCollectionFactoryInterface;
 use ApiPlatform\Core\Metadata\Property\PropertyNameCollection;
 use Symfony\Component\PropertyInfo\PropertyInfoExtractorInterface;
@@ -36,16 +35,11 @@ public function __construct(PropertyInfoExtractorInterface $propertyInfo)
 
     /**
      * {@inheritdoc}
-     *
-     * @throws RuntimeException
      */
     public function create(string $resourceClass, array $options = []): PropertyNameCollection
     {
         $properties = $this->propertyInfo->getProperties($resourceClass, $options);
-        if (null === $properties) {
-            throw new RuntimeException(sprintf('There is no PropertyInfo extractor supporting the class "%s".', $resourceClass));
-        }
 
-        return new PropertyNameCollection($properties);
+        return new PropertyNameCollection($properties ?? []);
     }
 }

tests/Bridge/Symfony/PropertyInfo/Metadata/Property/PropertyInfoPropertyNameCollectionFactoryTest.php

@@ -0,0 +1,73 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Core\Tests\Bridge\Symfony\PropertyInfo\Metadata\Property;
+
+use ApiPlatform\Core\Bridge\Symfony\PropertyInfo\Metadata\Property\PropertyInfoPropertyNameCollectionFactory;
+use ApiPlatform\Core\Tests\Fixtures\DummyObjectWithOnlyPrivateProperty;
+use ApiPlatform\Core\Tests\Fixtures\DummyObjectWithOnlyPublicProperty;
+use ApiPlatform\Core\Tests\Fixtures\DummyObjectWithoutProperty;
+use ApiPlatform\Core\Tests\Fixtures\DummyObjectWithPublicAndPrivateProperty;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\PropertyInfo\Extractor\ReflectionExtractor;
+use Symfony\Component\PropertyInfo\PropertyInfoExtractor;
+
+/**
+ * @author Oskar Stark <[email protected]>
+ */
+class PropertyInfoPropertyNameCollectionFactoryTest extends TestCase
+{
+    public function testCreateMethodReturnsEmptyPropertyNameCollectionForObjectWithOnlyPrivateProperty()
+    {
+        $factory = new PropertyInfoPropertyNameCollectionFactory(new PropertyInfoExtractor([
+            new ReflectionExtractor(),
+        ]));
+
+        $collection = $factory->create(DummyObjectWithOnlyPrivateProperty::class);
+
+        self::assertCount(0, $collection->getIterator());
+    }
+
+    public function testCreateMethodReturnsEmptyPropertyNameCollectionForObjectWithoutProperties()
+    {
+        $factory = new PropertyInfoPropertyNameCollectionFactory(new PropertyInfoExtractor([
+            new ReflectionExtractor(),
+        ]));
+
+        $collection = $factory->create(DummyObjectWithoutProperty::class);
+
+        self::assertCount(0, $collection->getIterator());
+    }
+
+    public function testCreateMethodReturnsProperPropertyNameCollectionForObjectWithPublicAndPrivateProperty()
+    {
+        $factory = new PropertyInfoPropertyNameCollectionFactory(new PropertyInfoExtractor([
+            new ReflectionExtractor(),
+        ]));
+
+        $collection = $factory->create(DummyObjectWithPublicAndPrivateProperty::class);
+
+        self::assertCount(1, $collection->getIterator());
+    }
+
+    public function testCreateMethodReturnsProperPropertyNameCollectionForObjectWithPublicProperty()
+    {
+        $factory = new PropertyInfoPropertyNameCollectionFactory(new PropertyInfoExtractor([
+            new ReflectionExtractor(),
+        ]));
+
+        $collection = $factory->create(DummyObjectWithOnlyPublicProperty::class);
+
+        self::assertCount(1, $collection->getIterator());
+    }
+}

tests/Fixtures/DummyObjectWithOnlyPrivateProperty.php

@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Core\Tests\Fixtures;
+
+class DummyObjectWithOnlyPrivateProperty
+{
+    private $foo;
+}

tests/Fixtures/DummyObjectWithOnlyPublicProperty.php

@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Core\Tests\Fixtures;
+
+class DummyObjectWithOnlyPublicProperty
+{
+    public $foo;
+}

tests/Fixtures/DummyObjectWithPublicAndPrivateProperty.php

@@ -0,0 +1,20 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Core\Tests\Fixtures;
+
+class DummyObjectWithPublicAndPrivateProperty
+{
+    public $foo;
+    private $bar;
+}

tests/Fixtures/DummyObjectWithoutProperty.php

@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Core\Tests\Fixtures;
+
+class DummyObjectWithoutProperty
+{
+}