PreprocessPagerTest.php

<?php

namespace Drupal\Tests\system\Unit\Pager;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Tests\UnitTestCase;

/**
 * Tests pager preprocessing.
 *
 * @group system
 */
class PreprocessPagerTest extends UnitTestCase {
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $pager_manager = $this->getMockBuilder('Drupal\\Core\\Pager\\PagerManager')
            ->disableOriginalConstructor()
            ->getMock();
        $pager = $this->getMockBuilder('Drupal\\Core\\Pager\\Pager')
            ->disableOriginalConstructor()
            ->getMock();
        $url_generator = $this->getMockBuilder('Drupal\\Core\\Routing\\UrlGenerator')
            ->disableOriginalConstructor()
            ->getMock();
        $pager->method('getTotalPages')
            ->willReturn(2);
        $pager->method('getCurrentPage')
            ->willReturn(1);
        $url_generator->method('generateFromRoute')
            ->willReturn('');
        $pager_manager->method('getPager')
            ->willReturn($pager);
        $pager_manager->method('getUpdatedParameters')
            ->willReturn('');
        $container = new ContainerBuilder();
        $container->set('pager.manager', $pager_manager);
        $container->set('url_generator', $url_generator);
        \Drupal::setContainer($container);
    }
    
    /**
     * Tests template_preprocess_pager() when an empty #quantity is passed.
     *
     * @covers ::template_preprocess_pager
     */
    public function testQuantityNotSet() {
        require_once $this->root . '/core/includes/theme.inc';
        $variables = [
            'pager' => [
                '#element' => '',
                '#parameters' => [],
                '#quantity' => '',
                '#route_name' => '',
                '#tags' => '',
            ],
        ];
        template_preprocess_pager($variables);
        $this->assertEquals([
            'first',
            'previous',
        ], array_keys($variables['items']));
    }

}