CacheTagsInvalidatorTest.php

<?php

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

use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Cache\CacheTagsInvalidator;
use Drupal\Core\Cache\CacheTagsInvalidatorInterface;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\Core\Cache\CacheTagsInvalidator
 * @group Cache
 */
class CacheTagsInvalidatorTest extends UnitTestCase {
    
    /**
     * @covers ::invalidateTags
     */
    public function testInvalidateTagsWithInvalidTags() : void {
        $cache_tags_invalidator = new CacheTagsInvalidator();
        $this->expectException(\AssertionError::class);
        $cache_tags_invalidator->invalidateTags([
            'node' => [
                2,
                3,
                5,
                8,
                13,
            ],
        ]);
    }
    
    /**
     * @covers ::invalidateTags
     * @covers ::addInvalidator
     * @covers ::addBin
     */
    public function testInvalidateTags() : void {
        $cache_tags_invalidator = new CacheTagsInvalidator();
        $invalidator_cache_bin = $this->createMock(InvalidatingCacheBackendInterface::class);
        $invalidator_cache_bin->expects($this->once())
            ->method('invalidateTags')
            ->with([
            'node:1',
        ]);
        $cache_tags_invalidator->addBin($invalidator_cache_bin);
        // We do not have to define that invalidateTags() is never called as the
        // interface does not define that method, trying to call it would result in
        // a fatal error.
        $non_invalidator_cache_bin = $this->createMock(CacheBackendInterface::class);
        $cache_tags_invalidator->addBin($non_invalidator_cache_bin);
        $invalidator = $this->createMock(CacheTagsInvalidatorInterface::class);
        $invalidator->expects($this->once())
            ->method('invalidateTags')
            ->with([
            'node:1',
        ]);
        $cache_tags_invalidator->addInvalidator($invalidator);
        $cache_tags_invalidator->invalidateTags([
            'node:1',
        ]);
    }

}

/**
 * Test interface for testing the cache tags validator.
 */
interface InvalidatingCacheBackendInterface extends CacheTagsInvalidatorInterface, CacheBackendInterface {

}