feat(serializer): support filter interface on serializer filter parameter provider (#7047)

Author: deguif

src/Serializer/Parameter/SerializerFilterParameterProvider.php

@@ -35,12 +35,14 @@ public function provide(Parameter $parameter, array $parameters = [], array $con
             return null;
         }
 
-        $filter = $parameter->getFilter();
-        if (!\is_string($filter) || !$this->filterLocator->has($filter)) {
+        if (null === ($filter = $parameter->getFilter())) {
             return null;
         }
 
-        $filter = $this->filterLocator->get($filter);
+        if (\is_string($filter) && $this->filterLocator->has($filter)) {
+            $filter = $this->filterLocator->get($filter);
+        }
+
         if (!$filter instanceof FilterInterface) {
             return null;
         }

tests/Functional/Parameters/ParameterTest.php

@@ -34,6 +34,7 @@ public static function getResources(): array
     public function testWithGroupFilter(): void
     {
         $response = self::createClient()->request('GET', 'with_parameters/1?groups[]=b');
+        $this->assertArrayNotHasKey('a', $response->toArray());
         $this->assertArraySubset(['b' => 'bar'], $response->toArray());
         $response = self::createClient()->request('GET', 'with_parameters/1?groups[]=b&groups[]=a');
         $this->assertArraySubset(['a' => 'foo', 'b' => 'bar'], $response->toArray());