Fix bug in Scene constructor

src/Models/Scene.php

@@ -55,7 +55,7 @@ class Scene implements CreateableInterface
      */
     public function __construct()
     {
-        $this->children = ArrayCollection();
+        $this->children = new ArrayCollection();
     }
 
     /**

tests/Models/SceneModelTest.php

@@ -13,7 +13,12 @@ class SceneModelTest extends CoreModelTestCase
 {
     /** @var string default data set */
     protected $dataset = "scene";
-    
+
+    public function testCreate()
+    {
+        $scene = new Scene();
+    }
+
     /**
      * Test getter methods
      */
@@ -21,71 +26,71 @@ class SceneModelTest extends CoreModelTestCase
     {
         $em = $this->getEntityManager();
         $scene = $em->getRepository(Scene::class)->find(2);
-        
+
         $this->assertEquals("The Forest", $scene->getTitle());
         $this->assertEquals("This is a very dangerous and dark forest", $scene->getDescription());
         $this->assertInstanceOf(Scene::class, $scene->getParent());
         $this->assertEquals(true, $scene->hasParent());
         $this->assertEquals(false, $scene->hasChildren());
-        
+
         $em->flush();
     }
-    
+
     /**
      * Test if parent<=>child relationship is working.
      */
     public function testChildParentRelationships()
     {
         $em = $this->getEntityManager();
-        
+
         $parentScene = $em->getRepository(Scene::class)->find(1);
         $childScene = $em->getRepository(Scene::class)->find(2);
-        
+
         $this->assertEquals($parentScene, $childScene->getParent());
         $this->assertContains($childScene, $parentScene->getChildren());
-        
+
         $em->flush();
     }
-    
+
     /**
      * Test if the scene can be removed.
      */
     public function testMoveScene()
     {
         $em = $this->getEntityManager();
-        
+
         $parentScene1 = $em->getRepository(Scene::class)->find(1);
         $parentScene2 = $em->getRepository(Scene::class)->find(4);
-        
+
         $orphanScene = $em->getRepository(scene::class)->find(5);
         $this->assertEquals(false, $orphanScene->hasParent());
         $this->assertEquals(false, $orphanScene->hasChildren());
-        
+
         // Assign orphanScene to parentScene1 and check relationships
         $orphanScene->setParent($parentScene1);
-        
+
         $this->assertEquals(true, $orphanScene->hasParent());
         $this->assertCount(3, $parentScene1->getChildren());
         $this->assertEquals($parentScene1, $orphanScene->getParent());
         $this->assertContains($orphanScene, $parentScene1->getChildren());
-        
+
         // Move the scene now to parentScene2 and check relationships
         $orphanScene->setParent($parentScene2);
-        
+
         $this->assertCount(2, $parentScene1->getChildren());
         $this->assertCount(1, $parentScene2->getChildren());
         $this->assertEquals($parentScene2, $orphanScene->getParent());
         $this->assertContains($orphanScene, $parentScene2->getChildren());
-        
+
         // Make an orphan out of it again
         $orphanScene->setParent(null);
-        
+
         $this->assertCount(2, $parentScene1->getChildren());
         $this->assertCount(0, $parentScene2->getChildren());
         $this->assertEquals(false, $orphanScene->hasParent());
         $this->assertNotContains($orphanScene, $parentScene1->getChildren());
         $this->assertNotContains($orphanScene, $parentScene2->getChildren());
-        
+
         $em->flush();
     }
 }