From 5fb766da1482b1927ad4e0f0b3dc958fdd2ef660 Mon Sep 17 00:00:00 2001
From: Jun Pataleta <jun@moodle.com>
Date: Tue, 9 Jul 2019 10:47:53 +0800
Subject: [PATCH] MDL-65965 behat: Do not fetch grouping IDs for empty grouping
 idnumbers

---
 lib/tests/behat/behat_data_generators.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/tests/behat/behat_data_generators.php b/lib/tests/behat/behat_data_generators.php
index efdba68aeaf..699fcc615db 100644
--- a/lib/tests/behat/behat_data_generators.php
+++ b/lib/tests/behat/behat_data_generators.php
@@ -806,6 +806,11 @@ class behat_data_generators extends behat_base {
     protected function get_grouping_id($idnumber) {
         global $DB;
 
+        // Do not fetch grouping ID for empty grouping idnumber.
+        if (empty($idnumber)) {
+            return null;
+        }
+
         if (!$id = $DB->get_field('groupings', 'id', array('idnumber' => $idnumber))) {
             throw new Exception('The specified grouping with idnumber "' . $idnumber . '" does not exist');
         }