refactor: Add synchronous option for SQLite tests (#9717)

* refactor: Add `synchronous` option for SQLite tests

* refactor: Add `synchronous` option for SQLite tests in `Config\Database`

* docs: Update userguide

Author: neznaika0

app/Config/Database.php

@@ -182,6 +182,7 @@ class Database extends Config
         'port'        => 3306,
         'foreignKeys' => true,
         'busyTimeout' => 1000,
+        'synchronous' => null,
         'dateFormat'  => [
             'date'     => 'Y-m-d',
             'datetime' => 'Y-m-d H:i:s',

tests/_support/Config/Registrar.php

@@ -83,6 +83,7 @@ class Registrar
             'failover'    => [],
             'port'        => 3306,
             'foreignKeys' => true,
+            'synchronous' => 0,
         ],
         'SQLSRV' => [
             'DSN'      => '',

user_guide_src/source/changelogs/v4.6.4.rst

@@ -22,6 +22,8 @@ Message Changes
 Changes
 *******
 
+- **Config:** Added the ``synchronous`` key for ``Config\Database::$tests``. For SQLite3 driver only.
+
 ************
 Deprecations
 ************

user_guide_src/source/installation/upgrade_464.rst

@@ -44,7 +44,8 @@ and it is recommended that you merge the updated versions with your application:
 Config
 ------
 
-- @TODO
+- app/Config/Database.php
+    - Added the ``synchronous`` key for ``Config\Database::$tests``.
 
 All Changes
 ===========