DataProcessorTest.php

<?php

namespace Drupal\Tests\rules\Kernel;

use Drupal\Core\Messenger\MessengerInterface;
use Drupal\rules\Context\ContextDefinition;
use Drupal\rules\Context\ContextConfig;
use Drupal\rules\Engine\RulesComponent;

/**
 * Test the data processor plugins during Rules evaluation.
 *
 * @group Rules
 */
class DataProcessorTest extends RulesKernelTestBase {
    
    /**
     * Tests that the numeric offset plugin works.
     */
    public function testNumericOffset() {
        // Configure a simple rule with one action.
        $action = $this->expressionManager
            ->createInstance('rules_action', ContextConfig::create()->map('message', 'message')
            ->map('type', 'type')
            ->process('message', 'rules_numeric_offset', [
            'offset' => 1,
        ])
            ->setConfigKey('action_id', 'rules_system_message')
            ->toArray());
        $component = RulesComponent::create($this->expressionManager
            ->createRule())
            ->addContextDefinition('message', ContextDefinition::create('string'))
            ->addContextDefinition('type', ContextDefinition::create('string'))
            ->setContextValue('message', 1)
            ->setContextValue('type', 'status');
        $component->getExpression()
            ->addExpressionObject($action);
        $component->execute();
        $messages = $this->messenger
            ->all();
        // The original value was 1 and the processor adds 1, so the result should
        // be 2.
        $this->assertEquals((string) $messages[MessengerInterface::TYPE_STATUS][0], '2');
    }

}