Issue #3293288 by Spokje, alexpott, longwave, quietone: Remove the /core/modules/simpletest folder

(cherry picked from commit 0586c531)

core/modules/file/tests/src/Kernel/Migrate/d6/FileMigrationTestTrait.php

@@ -29,7 +29,7 @@ protected function prepareMigration(MigrationInterface $migration) {
     if ($destination['plugin'] === 'entity:file') {
       // Make sure we have a single trailing slash.
       $source = $migration->getSourceConfiguration();
-      $source['site_path'] = 'core/modules/simpletest';
+      $source['site_path'] = 'core/tests/fixtures';
       $source['constants']['source_base_path'] = $this->root . '/';
       $migration->set('source', $source);
     }

core/modules/file/tests/src/Kernel/Migrate/d6/MigrateFileTest.php

@@ -31,6 +31,13 @@ class MigrateFileTest extends MigrateDrupal6TestBase implements MigrateDumpAlter
   protected function setUp(): void {
     parent::setUp();
 
+    // Remove the file_directory_path to test site_path setting.
+    // @see \Drupal\Tests\file\Kernel\Migrate\d6\FileMigrationTestTrait::prepareMigration()
+    Database::getConnection('default', 'migrate')
+      ->delete('variable')
+      ->condition('name', 'file_directory_path')
+      ->execute();
+
     $this->setUpMigratedFiles();
   }
 
@@ -97,11 +104,11 @@ public function testFiles() {
       ->truncate($map_table)
       ->execute();
 
-    // Update the file_directory_path.
+    // Set the file_directory_path.
     Database::getConnection('default', 'migrate')
-      ->update('variable')
-      ->fields(['value' => serialize('files/test')])
-      ->condition('name', 'file_directory_path')
+      ->insert('variable')
+      ->fields(['name', 'value'])
+      ->values(['name' => 'file_directory_path', 'value' => serialize('files/test')])
       ->execute();
 
     $this->executeMigration('d6_file');

core/modules/simpletest/simpletest.info.yml

-name: Testing
-type: module
-description: 'Obsolete. SimpleTest has been removed from core.'
-lifecycle: obsolete
-lifecycle_link: 'https://www.drupal.org/about/core/policies/core-change-policies/deprecated-and-obsolete-modules-and-themes#s-simpletest'
-package: Core
-version: VERSION
-hidden: true

core/modules/simpletest/simpletest.install

-<?php
-
-/**
- * @file
- * Uninstall functions for the simpletest module.
- */
-
-use Drupal\Core\Database\Database;
-use Drupal\Core\File\Exception\FileException;
-use Drupal\Core\Test\EnvironmentCleaner;
-use Drupal\Core\Test\TestDatabase;
-use Symfony\Component\Console\Output\NullOutput;
-
-/**
- * Implements hook_schema().
- */
-function simpletest_schema() {
-  return TestDatabase::testingSchema();
-}
-
-/**
- * Implements hook_uninstall().
- */
-function simpletest_uninstall() {
-  // Do not clean the environment in case the Simpletest module is uninstalled
-  // in a (recursive) test for itself, since EnvironmentCleaner would also
-  // delete the test site of the parent test process.
-  if (!drupal_valid_test_ua()) {
-    // Clean up left-over tables and directories.
-    $cleaner = new EnvironmentCleaner(
-      DRUPAL_ROOT,
-      Database::getConnection(),
-      TestDatabase::getConnection(),
-      new NullOutput(),
-      \Drupal::service('file_system')
-    );
-    try {
-      $cleaner->cleanEnvironment();
-    }
-    catch (Exception $e) {
-      // Ignore.
-    }
-  }
-
-  // Delete verbose test output and any other testing framework files.
-  try {
-    \Drupal::service('file_system')->deleteRecursive('public://simpletest');
-  }
-  catch (FileException $e) {
-    // Ignore.
-  }
-}