test for adding timestamp to database dump file

tests/Commands/BackupCommandTest.php

@@ -310,6 +310,23 @@
     app()['db']->disconnect();
 });
 
+it('appends timestamp to database backup file name', function () {
+    config()->set('backup.backup.source.databases', ['db1']);
+    config()->set('backup.backup.database_dump_file_timestamp_format', 'Y-m-d-H-i-s');
+
+    $this->setUpDatabase(app());
+
+    $this->artisan('backup:run --only-db')->assertExitCode(0);
+
+    $this->assertExactPathExistsInZip('local', $this->expectedZipPath, 'db-dumps/sqlite-db1-database-2016-01-01-21-01-01.sql');
+
+    /*
+     * Close the database connection to unlock the sqlite file for deletion.
+     * This prevents the errors from other tests trying to delete and recreate the folder.
+     */
+    app()['db']->disconnect();
+});
+
 it('should trigger the backup failed event', function () {
     // use an invalid dbname to trigger failure
     $this->artisan('backup:run --only-db --db-name=wrongName')->assertExitCode(1);