RulesEmailTest.php

<?php

namespace Drupal\Tests\rules\Kernel;


/**
 * Tests that emails actually go out with the send email action.
 *
 * @group Rules
 */
class RulesEmailTest extends RulesKernelTestBase {
    
    /**
     * The action manager used to instantiate the action plugin.
     *
     * @var \Drupal\rules\Core\RulesActionManagerInterface
     */
    protected $actionManager;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'rules',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Use the state system collector email backend.
        $this->container
            ->get('config.factory')
            ->getEditable('system.mail')
            ->set('interface.default', 'test_mail_collector')
            ->save();
        // Reset the state variable that holds sent messages.
        $this->container
            ->get('state')
            ->set('system.test_mail_collector', []);
        $this->actionManager = $this->container
            ->get('plugin.manager.rules_action');
    }
    
    /**
     * Checks the From: and Reply-to: headers.
     */
    public function testSubjectAndBody() {
        // Create action to send email.
        $action = $this->actionManager
            ->createInstance('rules_send_email');
        // Add context values to action.
        $action->setContextValue('to', [
            'mail@example.com',
        ])
            ->setContextValue('subject', 'subject')
            ->setContextValue('message', 'hello');
        // Send email.
        $action->execute();
        // Retrieve sent message.
        $captured_emails = $this->container
            ->get('state')
            ->get('system.test_mail_collector');
        $sent_message = end($captured_emails);
        // Check to make sure that our subject and body are as expected.
        $this->assertEquals($sent_message['to'], 'mail@example.com');
        $this->assertEquals($sent_message['subject'], 'subject');
        // Need to trim the email body to get rid of newline at end.
        $this->assertEquals(trim($sent_message['body']), 'hello');
    }

}