Test looping over metadata

tests/Model/MetadataTest.php

@@ -60,5 +60,18 @@ final class MetadataTest extends TestCase
         $result = $this->metadata->isSet('missing');
         $this->assertFalse($result);
     }
+
+    public function testLoopOverMetadata(): void
+    {
+        $this->metadata->set("a", "A")->set("b", "B")->set("c", "C");
+
+        $result = [];
+
+        foreach ($this->metadata as $key => $value) {
+            $result[$key] = $value;
+        }
+
+        $this->assertSame(["a" => "A", "b" => "B", "c" => "C"], $result);
+    }
 }