Issue #1812732 by xjm, tim.plunkett: Use constants instead of integers in...

Issue #1812732 by xjm, tim.plunkett: Use constants instead of integers in drupalCreateNode() and improve its documentation.

core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php

@@ -228,7 +228,6 @@ protected function drupalCreateNode(array $settings = array()) {
     $settings += array(
       'body'      => array(LANGUAGE_NOT_SPECIFIED => array(array())),
       'title'     => $this->randomName(8),
-      'comment'   => COMMENT_NODE_OPEN,
       'changed'   => REQUEST_TIME,
       'promote'   => NODE_NOT_PROMOTED,
       'revision'  => 1,
@@ -239,6 +238,13 @@ protected function drupalCreateNode(array $settings = array()) {
       'langcode'  => LANGUAGE_NOT_SPECIFIED,
     );
 
+    // Add in comment settings for nodes.
+    if (module_exists('comment')) {
+      $settings += array(
+        'comment' => COMMENT_NODE_OPEN,
+      );
+    }
+
     // Use the original node's created time for existing nodes.
     if (isset($settings['created']) && !isset($settings['date'])) {
       $settings['date'] = format_date($settings['created'], 'custom', 'Y-m-d H:i:s O');