DB/DirectDatabaseQuery: move syntax error test to its own file

Author: rodrigoprimo

WordPress/Tests/DB/DirectDatabaseQueryUnitTest.1.inc

@@ -332,7 +332,3 @@ function method_names_are_caseinsensitive() {
 	global $wpdb;
 	$autoload = $wpdb->Get_Var( $wpdb->Prepare( "SELECT autoload FROM $wpdb->options WHERE option_name = %s", $option_name ) ); // Warning x 2.
 }
-
-// Live coding/parse error test.
-// This must be the last test in the file.
-$wpdb->get_col( '

WordPress/Tests/DB/DirectDatabaseQueryUnitTest.2.inc

@@ -0,0 +1,8 @@
+<?php
+
+/*
+ * Intentional parse error (unclosed string).
+ * This should be the only test in this file.
+ */
+
+$wpdb->get_col( '