Ticket #36083: 36083.diff

new file tests/phpunit/tests/admin/includesUpdateCore.php

@@ +1 @@
+<?php
+
+/**
+ * @group admin
+ * @group upgrade
+ */
+class Tests_Admin_IncludesUpdateCore extends WP_UnitTestCase {
+        public function data_test_old_files_should_not_exist() {
+                global $_old_files;
+
+                require_once( ABSPATH . 'wp-admin/includes/update-core.php' );
+
+                foreach ( $_old_files as &$file ) {
+                        $file = array( $file );
+                }
+
+                return $_old_files;
+        }
+
+        /**
+         * @dataProvider data_test_old_files_should_not_exist
+         */
+        public function test_old_files_should_not_exist( $file ) {
+                $this->assertFalse( file_exists( ABSPATH . $file ) );
+                $this->assertFalse( file_exists( ABSPATH . str_replace( '.min.', '.', $file ) ) );
+                $this->assertFalse( file_exists( ABSPATH . str_replace( '-rtl.min.', '.', $file ) ) );
+        }
+}