Allowed interfaces as handled visitor FQCNs (#193)

Author: Steveb-p

src/contracts/Output/ValueObjectVisitorDispatcher.php

@@ -75,6 +75,13 @@ public function visit($data)
             }
         } while ($className = get_parent_class($className));
 
+        $interfaces = class_implements($data);
+        foreach ($interfaces as $interface) {
+            if (isset($this->visitors[$interface])) {
+                return $this->visitors[$interface]->visit($this->outputVisitor, $this->outputGenerator, $data);
+            }
+        }
+
         throw new Exceptions\NoVisitorFoundException($checkedClassNames);
     }
 }

tests/lib/Output/ValueObject.php

@@ -11,7 +11,7 @@
 /**
  * Test dummy class.
  */
-class ValueObject extends stdClass
+class ValueObject extends stdClass implements ValueObjectInterface
 {
 }
 

tests/lib/Output/ValueObjectInterface.php

@@ -0,0 +1,16 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace Ibexa\Tests\Rest\Output;
+
+/**
+ * Test dummy interface.
+ */
+interface ValueObjectInterface
+{
+}

tests/lib/Output/ValueObjectVisitorDispatcherTest.php

@@ -79,6 +79,22 @@ public function testVisitValueObjectParentMatch()
         $dispatcher->visit($data);
     }
 
+    public function testVisitInterface(): void
+    {
+        $data = new ValueObject();
+
+        $valueObjectVisitor = $this->getValueObjectVisitorMock();
+        $valueObjectVisitor
+            ->expects(self::once())
+            ->method('visit')
+            ->with($this->getOutputVisitorMock(), $this->getOutputGeneratorMock(), $data);
+
+        $dispatcher = $this->getValueObjectDispatcher();
+        $dispatcher->addVisitor(ValueObjectInterface::class, $valueObjectVisitor);
+
+        $dispatcher->visit($data);
+    }
+
     public function testVisitValueObjectSecondRuleParentMatch()
     {
         $data = new ValueObject();