TestConditionProvider.php

<?php

namespace Drupal\rules_test\Plugin\Condition;

use Drupal\rules\Core\RulesConditionBase;

/**
 * Test condition that adds a variable with the provided context.
 *
 * @Condition(
 *   id = "rules_test_provider",
 *   label = @Translation("Test condition provider"),
 *   category = @Translation("Tests"),
 *   provides = {
 *     "provided_text" = @ContextDefinition("string",
 *       label = @Translation("Provided text")
 *     ),
 *   }
 * )
 */
class TestConditionProvider extends RulesConditionBase {
    
    /**
     * {@inheritdoc}
     */
    public function evaluate() {
        $this->setProvidedValue('provided_text', 'test value');
        return TRUE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function summary() {
        // We don't care about summaries for test condition plugins.
        return '';
    }

}