MDL-43903 prevent adodb error logging output in phpunit execution with

native ms sql driver

auth/db/tests/db_test.php

@@ -28,11 +28,17 @@ defined('MOODLE_INTERNAL') || die();
 
 
 class auth_db_testcase extends advanced_testcase {
+    /** @var string Original error log */
+    protected $oldlog;
 
     protected function init_auth_database() {
         global $DB, $CFG;
         require_once("$CFG->dirroot/auth/db/auth.php");
 
+        // Discard error logs from AdoDB.
+        $this->oldlog = ini_get('error_log');
+        ini_set('error_log', "$CFG->dataroot/testlog.log");
+
         $dbman = $DB->get_manager();
 
         set_config('extencoding', 'utf-8', 'auth/db');
@@ -133,6 +139,8 @@ class auth_db_testcase extends advanced_testcase {
         $dbman = $DB->get_manager();
         $table = new xmldb_table('auth_db_users');
         $dbman->drop_table($table);
+
+        ini_set('error_log', $this->oldlog);
     }
 
     public function test_plugin() {

enrol/database/tests/sync_test.php

@@ -31,9 +31,16 @@ class enrol_database_testcase extends advanced_testcase {
     protected static $users = array();
     protected static $roles = array();
 
+    /** @var string Original error log */
+    protected $oldlog;
+
     protected function init_enrol_database() {
         global $DB, $CFG;
 
+        // Discard error logs from AdoDB.
+        $this->oldlog = ini_get('error_log');
+        ini_set('error_log', "$CFG->dataroot/testlog.log");
+
         $dbman = $DB->get_manager();
 
         set_config('dbencoding', 'utf-8', 'enrol_database');
@@ -160,6 +167,8 @@ class enrol_database_testcase extends advanced_testcase {
         self::$courses = null;
         self::$users = null;
         self::$roles = null;
+
+        ini_set('error_log', $this->oldlog);
     }
 
     protected function reset_enrol_database() {