class ForumManagerTest

class ForumManagerTest extends UnitTestCase {
    
    /**
     * Tests ForumManager::getIndex().
     */
    public function testGetIndex() {
        $entity_field_manager = $this->createMock(EntityFieldManagerInterface::class);
        $entity_type_manager = $this->createMock(EntityTypeManagerInterface::class);
        $storage = $this->getMockBuilder('\\Drupal\\taxonomy\\VocabularyStorage')
            ->disableOriginalConstructor()
            ->getMock();
        $config_factory = $this->createMock('\\Drupal\\Core\\Config\\ConfigFactoryInterface');
        $config = $this->getMockBuilder('\\Drupal\\Core\\Config\\Config')
            ->disableOriginalConstructor()
            ->getMock();
        $config_factory->expects($this->once())
            ->method('get')
            ->will($this->returnValue($config));
        $config->expects($this->once())
            ->method('get')
            ->will($this->returnValue('forums'));
        $entity_type_manager->expects($this->once())
            ->method('getStorage')
            ->will($this->returnValue($storage));
        // This is sufficient for testing purposes.
        $term = new \stdClass();
        $storage->expects($this->once())
            ->method('create')
            ->will($this->returnValue($term));
        $connection = $this->getMockBuilder('\\Drupal\\Core\\Database\\Connection')
            ->disableOriginalConstructor()
            ->getMock();
        $translation_manager = $this->getMockBuilder('\\Drupal\\Core\\StringTranslation\\TranslationManager')
            ->disableOriginalConstructor()
            ->getMock();
        $comment_manager = $this->getMockBuilder('\\Drupal\\comment\\CommentManagerInterface')
            ->disableOriginalConstructor()
            ->getMock();
        $manager = $this->getMockBuilder('\\Drupal\\forum\\ForumManager')
            ->setMethods([
            'getChildren',
        ])
            ->setConstructorArgs([
            $config_factory,
            $entity_type_manager,
            $connection,
            $translation_manager,
            $comment_manager,
            $entity_field_manager,
        ])
            ->getMock();
        $manager->expects($this->once())
            ->method('getChildren')
            ->will($this->returnValue([]));
        // Get the index once.
        $index1 = $manager->getIndex();
        // Get it again. This should not return the previously generated index. If
        // it does not, then the test will fail as the mocked methods will be called
        // more than once.
        $index2 = $manager->getIndex();
        $this->assertEquals($index1, $index2);
    }

}