CommentManagerTest.php

<?php

namespace Drupal\Tests\comment\Unit;

use Drupal\comment\CommentManager;
use Drupal\Core\Entity\EntityDisplayRepositoryInterface;
use Drupal\Core\Entity\EntityFieldManagerInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Entity\FieldableEntityInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\comment\CommentManager
 * @group comment
 */
class CommentManagerTest extends UnitTestCase {
    
    /**
     * Tests the getFields method.
     *
     * @covers ::getFields
     */
    public function testGetFields() {
        // Set up a content entity type.
        $entity_type = $this->createMock('Drupal\\Core\\Entity\\ContentEntityTypeInterface');
        $entity_type->expects($this->any())
            ->method('getClass')
            ->will($this->returnValue('Node'));
        $entity_type->expects($this->any())
            ->method('entityClassImplements')
            ->with(FieldableEntityInterface::class)
            ->will($this->returnValue(TRUE));
        $entity_field_manager = $this->createMock(EntityFieldManagerInterface::class);
        $entity_type_manager = $this->createMock(EntityTypeManagerInterface::class);
        $entity_field_manager->expects($this->once())
            ->method('getFieldMapByFieldType')
            ->will($this->returnValue([
            'node' => [
                'field_foobar' => [
                    'type' => 'comment',
                ],
            ],
        ]));
        $entity_type_manager->expects($this->any())
            ->method('getDefinition')
            ->will($this->returnValue($entity_type));
        $comment_manager = new CommentManager($entity_type_manager, $this->createMock('Drupal\\Core\\Config\\ConfigFactoryInterface'), $this->createMock('Drupal\\Core\\StringTranslation\\TranslationInterface'), $this->createMock('Drupal\\Core\\Extension\\ModuleHandlerInterface'), $this->createMock(AccountInterface::class), $entity_field_manager, $this->prophesize(EntityDisplayRepositoryInterface::class)
            ->reveal());
        $comment_fields = $comment_manager->getFields('node');
        $this->assertArrayHasKey('field_foobar', $comment_fields);
    }

}