trait NodeCreationTrait

trait NodeCreationTrait {
    
    /**
     * Get a node from the database based on its title.
     *
     * @param string|\Drupal\Component\Render\MarkupInterface $title
     *   A node title, usually generated by $this->randomMachineName().
     * @param $reset
     *   (optional) Whether to reset the entity cache.
     *
     * @return \Drupal\node\NodeInterface|false
     *   A node entity matching $title, FALSE when node with $title is not found.
     */
    public function getNodeByTitle($title, $reset = FALSE) {
        if ($reset) {
            \Drupal::entityTypeManager()->getStorage('node')
                ->resetCache();
        }
        // Cast MarkupInterface objects to string.
        $title = (string) $title;
        $nodes = \Drupal::entityTypeManager()->getStorage('node')
            ->loadByProperties([
            'title' => $title,
        ]);
        // Load the first node returned from the database.
        $returned_node = reset($nodes);
        return $returned_node;
    }
    
    /**
     * Creates a node based on default settings.
     *
     * @param array $values
     *   (optional) An associative array of values for the node, as used in
     *   creation of entity. Override the defaults by specifying the key and value
     *   in the array, for example:
     *
     *   @code
     *     $this->drupalCreateNode([
     *       'title' => t('Hello, world!'),
     *       'type' => 'article',
     *     ]);
     *   @endcode
     *   The following defaults are provided, if the node has the field in
     *   question:
     *   - body: Random string using the default filter format:
     *     @code
     *       $values['body'][0] = [
     *         'value' => $this->randomMachineName(32),
     *         'format' => filter_default_format(),
     *       ];
     *     @endcode
     *   - title: Random string.
     *   - type: 'page'.
     *   - uid: The currently logged in user, or anonymous.
     *
     * @return \Drupal\node\NodeInterface
     *   The created node entity.
     */
    protected function createNode(array $values = []) {
        // Populate defaults array.
        $values += [
            'title' => $this->randomMachineName(8),
            'type' => 'page',
        ];
        // Create node object.
        $node = Node::create($values);
        // If the node has a field named 'body', we assume it's a body field and
        // that the filter module is present.
        if (!array_key_exists('body', $values) && $node->hasField('body')) {
            $body = [
                'value' => $this->randomMachineName(32),
                'format' => filter_default_format(),
            ];
            $node->set('body', $body);
        }
        if (!array_key_exists('uid', $values)) {
            $user = User::load(\Drupal::currentUser()->id());
            if ($user) {
                $uid = $user->id();
            }
            elseif (method_exists($this, 'setUpCurrentUser')) {
                
                /** @var \Drupal\user\UserInterface $user */
                $user = $this->setUpCurrentUser();
                $uid = $user->id();
            }
            else {
                $uid = 0;
            }
            $node->set('uid', $uid);
        }
        $node->save();
        return $node;
    }

}