MailManagerTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\Core\Mail;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\Render\RenderContext;
use Drupal\Core\Render\RendererInterface;
use Drupal\Tests\UnitTestCase;
use Drupal\Core\Mail\MailManager;
use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;

/**
 * @coversDefaultClass \Drupal\Core\Mail\MailManager
 * @group Mail
 */
class MailManagerTest extends UnitTestCase {
    
    /**
     * The cache backend to use.
     *
     * @var \Drupal\Core\Cache\CacheBackendInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $cache;
    
    /**
     * The module handler.
     *
     * @var \Drupal\Core\Extension\ModuleHandlerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $moduleHandler;
    
    /**
     * The configuration factory.
     *
     * @var \Drupal\Core\Config\ConfigFactoryInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $configFactory;
    
    /**
     * The plugin discovery.
     *
     * @var \Drupal\Component\Plugin\Discovery\DiscoveryInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $discovery;
    
    /**
     * The renderer.
     *
     * @var \Drupal\Core\Render\RendererInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $renderer;
    
    /**
     * The mail manager under test.
     *
     * @var \Drupal\Tests\Core\Mail\TestMailManager
     */
    protected $mailManager;
    
    /**
     * The request stack.
     *
     * @var \Symfony\Component\HttpFoundation\RequestStack|\Prophecy\Prophecy\ProphecyInterface
     */
    protected $requestStack;
    
    /**
     * The current request.
     *
     * @var \Symfony\Component\HttpFoundation\Request
     */
    protected $request;
    
    /**
     * A list of mail plugin definitions.
     *
     * @var array
     */
    protected $definitions = [
        'php_mail' => [
            'id' => 'php_mail',
            'class' => 'Drupal\\Core\\Mail\\Plugin\\Mail\\PhpMail',
        ],
        'test_mail_collector' => [
            'id' => 'test_mail_collector',
            'class' => 'Drupal\\Core\\Mail\\Plugin\\Mail\\TestMailCollector',
        ],
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Prepare the default constructor arguments required by MailManager.
        $this->cache = $this->createMock('Drupal\\Core\\Cache\\CacheBackendInterface');
        $this->moduleHandler = $this->createMock('Drupal\\Core\\Extension\\ModuleHandlerInterface');
        // Mock a Discovery object to replace AnnotationClassDiscovery.
        $this->discovery = $this->createMock('Drupal\\Component\\Plugin\\Discovery\\DiscoveryInterface');
        $this->discovery
            ->expects($this->any())
            ->method('getDefinitions')
            ->willReturn($this->definitions);
    }
    
    /**
     * Sets up the mail manager for testing.
     */
    protected function setUpMailManager($interface = []) : void {
        // Use the provided config for system.mail.interface settings.
        $this->configFactory = $this->getConfigFactoryStub([
            'system.mail' => [
                'interface' => $interface,
                'mailer_dsn' => [
                    'scheme' => 'null',
                    'host' => 'null',
                    'user' => NULL,
                    'password' => NULL,
                    'port' => NULL,
                    'options' => [],
                ],
            ],
            'system.site' => [
                'mail' => 'test@example.com',
            ],
        ]);
        $logger_factory = $this->createMock('\\Drupal\\Core\\Logger\\LoggerChannelFactoryInterface');
        $string_translation = $this->getStringTranslationStub();
        $this->renderer = $this->createMock(RendererInterface::class);
        // Construct the manager object and override its discovery.
        $this->mailManager = new TestMailManager(new \ArrayObject(), $this->cache, $this->moduleHandler, $this->configFactory, $logger_factory, $string_translation, $this->renderer);
        $this->mailManager
            ->setDiscovery($this->discovery);
        $this->request = new Request();
        $this->requestStack = $this->prophesize(RequestStack::class);
        $this->requestStack
            ->getCurrentRequest()
            ->willReturn($this->request);
        // @see \Drupal\Core\Plugin\Factory\ContainerFactory::createInstance()
        $container = new ContainerBuilder();
        $container->set('config.factory', $this->configFactory);
        $container->set('request_stack', $this->requestStack
            ->reveal());
        \Drupal::setContainer($container);
    }
    
    /**
     * Tests the getInstance method.
     *
     * @covers ::getInstance
     */
    public function testGetInstance() : void {
        $interface = [
            'default' => 'php_mail',
            'example_test_key' => 'test_mail_collector',
        ];
        $this->setUpMailManager($interface);
        // Test that an unmatched message_id returns the default plugin instance.
        $options = [
            'module' => 'foo',
            'key' => 'bar',
        ];
        $instance = $this->mailManager
            ->getInstance($options);
        $this->assertInstanceOf('Drupal\\Core\\Mail\\Plugin\\Mail\\PhpMail', $instance);
        // Test that a matching message_id returns the specified plugin instance.
        $options = [
            'module' => 'example',
            'key' => 'test_key',
        ];
        $instance = $this->mailManager
            ->getInstance($options);
        $this->assertInstanceOf('Drupal\\Core\\Mail\\Plugin\\Mail\\TestMailCollector', $instance);
    }
    
    /**
     * Tests that mails are sent in a separate render context.
     *
     * @covers ::mail
     */
    public function testMailInRenderContext() : void {
        $interface = [
            'default' => 'php_mail',
            'example_test_key' => 'test_mail_collector',
        ];
        $this->setUpMailManager($interface);
        $this->renderer
            ->expects($this->exactly(1))
            ->method('executeInRenderContext')
            ->willReturnCallback(function (RenderContext $render_context, $callback) {
            $message = $callback();
            $this->assertEquals('example', $message['module']);
        });
        $this->mailManager
            ->mail('example', 'key', 'to@example.org', 'en');
    }

}

/**
 * Provides a testing version of MailManager with an empty constructor.
 */
class TestMailManager extends MailManager {
    
    /**
     * Sets the discovery for the manager.
     *
     * @param \Drupal\Component\Plugin\Discovery\DiscoveryInterface $discovery
     *   The discovery object.
     */
    public function setDiscovery(DiscoveryInterface $discovery) : void {
        $this->discovery = $discovery;
    }
    
    /**
     * {@inheritdoc}
     */
    public function doMail($module, $key, $to, $langcode, $params = [], $reply = NULL, $send = TRUE) {
        // Build a simplified message array and return it.
        $message = [
            'id' => $module . '_' . $key,
            'module' => $module,
            'key' => $key,
            'to' => $to,
            'from' => 'from@example.org',
            'reply-to' => $reply,
            'langcode' => $langcode,
            'params' => $params,
            'send' => TRUE,
            'subject' => '',
            'body' => [],
        ];
        return $message;
    }

}