Issue #3105760 by TR: Empty Rules are firing

      $action_set = $this->expressionManager->createActionSet();

      // @todo Only load active reaction rules here.

      $configs = $this->entityStorage->loadByProperties(['events.*.event_name' => $event_id]);

      if ($configs) {

        // We should only produce $results if there are loaded reaction rules.

        foreach ($configs as $config) {

          $action_set->addExpressionObject($config->getExpression());

        }

        $results[$event_id] = RulesComponent::create($action_set);

      }

    }

    return $results;

  }

<?php

namespace Drupal\Tests\rules\Functional;

/**

 * Tests that the Rules UI pages are reachable.

 *

 * @group RulesUi

 */

class RulesDebugLogTest extends RulesBrowserTestBase {

  /**

   * Modules to enable.

   *

   * @var array

   */

  public static $modules = ['rules', 'rules_test'];

  /**

   * We use the minimal profile because we want to test local action links.

   *

   * @var string

   */

  protected $profile = 'minimal';

  /**

   * {@inheritdoc}

   */

  protected function setUp() {

    parent::setUp();

    // Testing profile doesn't include a 'page' content type.

    // We will need this to test bundle-specific entity CRUD events.

    $this->createContentType([

      'type' => 'page',

      'name' => 'Basic page',

    ]);

    // Turn on debug logging.

    $this->config('rules.settings')

      ->set('debug_log.enabled', TRUE)

      ->set('debug_log.log_level', 'debug')

      ->save();

  }

  /**

   * Tests that entity CRUD events get fired only once.

   */

  public function testEventDebugLogMessage() {

    // Create a user who can see the rules debug logs.

    $account = $this->createUser([

      'administer rules',

      'access rules debug',

      'create page content',

    ]);

    $this->drupalLogin($account);

    // Create a Rule which we can trigger.

    $this->drupalGet('admin/config/workflow/rules');

    $this->clickLink('Add reaction rule');

    $this->fillField('Label', 'Test rule');

    $this->fillField('Machine-readable name', 'test_rule');

    $this->fillField('React on event', 'rules_entity_insert:node');

    $this->pressButton('Save');

    // Add a new page, which should trigger the above Rule.

    $this->drupalGet('node/add/page');

    $this->fillField('Title', 'Test page');

    $this->pressButton('Save');

    /** @var \Drupal\Tests\WebAssert $assert */

    $assert = $this->assertSession();

    // Ensure that one and only one event message appears.

    $assert->pageTextContainsOnce('0 ms Reacting on event After saving a new content item.');

  }

}