AliasTest.php

<?php

namespace Drupal\Tests\path_alias\Kernel;

use Drupal\Core\Cache\MemoryCounterBackend;
use Drupal\Core\Language\LanguageInterface;
use Drupal\KernelTests\KernelTestBase;
use Drupal\path_alias\AliasManager;
use Drupal\path_alias\AliasWhitelist;
use Drupal\Tests\Traits\Core\PathAliasTestTrait;

/**
 * Tests path alias CRUD and lookup functionality.
 *
 * @coversDefaultClass \Drupal\path_alias\AliasRepository
 *
 * @group path_alias
 */
class AliasTest extends KernelTestBase {
    use PathAliasTestTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'path_alias',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        // The alias whitelist expects that the menu path roots are set by a
        // menu router rebuild.
        \Drupal::state()->set('router.path_roots', [
            'user',
            'admin',
        ]);
        $this->installEntitySchema('path_alias');
    }
    
    /**
     * @covers ::lookupBySystemPath
     */
    public function testLookupBySystemPath() {
        $this->createPathAlias('/test-source-Case', '/test-alias');
        $path_alias_repository = $this->container
            ->get('path_alias.repository');
        $this->assertEquals('/test-alias', $path_alias_repository->lookupBySystemPath('/test-source-Case', LanguageInterface::LANGCODE_NOT_SPECIFIED)['alias']);
        $this->assertEquals('/test-alias', $path_alias_repository->lookupBySystemPath('/test-source-case', LanguageInterface::LANGCODE_NOT_SPECIFIED)['alias']);
    }
    
    /**
     * @covers ::lookupByAlias
     */
    public function testLookupByAlias() {
        $this->createPathAlias('/test-source', '/test-alias-Case');
        $path_alias_repository = $this->container
            ->get('path_alias.repository');
        $this->assertEquals('/test-source', $path_alias_repository->lookupByAlias('/test-alias-Case', LanguageInterface::LANGCODE_NOT_SPECIFIED)['path']);
        $this->assertEquals('/test-source', $path_alias_repository->lookupByAlias('/test-alias-case', LanguageInterface::LANGCODE_NOT_SPECIFIED)['path']);
    }
    
    /**
     * @covers \Drupal\path_alias\AliasManager::getPathByAlias
     * @covers \Drupal\path_alias\AliasManager::getAliasByPath
     */
    public function testLookupPath() {
        // Create AliasManager and Path object.
        $aliasManager = $this->container
            ->get('path_alias.manager');
        // Test the situation where the source is the same for multiple aliases.
        // Start with a language-neutral alias, which we will override.
        $path_alias = $this->createPathAlias('/user/1', '/foo');
        $this->assertEquals($path_alias->getAlias(), $aliasManager->getAliasByPath($path_alias->getPath()), 'Basic alias lookup works.');
        $this->assertEquals($path_alias->getPath(), $aliasManager->getPathByAlias($path_alias->getAlias()), 'Basic source lookup works.');
        // Create a language specific alias for the default language (English).
        $path_alias = $this->createPathAlias('/user/1', '/users/Dries', 'en');
        $this->assertEquals($path_alias->getAlias(), $aliasManager->getAliasByPath($path_alias->getPath()), 'English alias overrides language-neutral alias.');
        $this->assertEquals($path_alias->getPath(), $aliasManager->getPathByAlias($path_alias->getAlias()), 'English source overrides language-neutral source.');
        // Create a language-neutral alias for the same path, again.
        $path_alias = $this->createPathAlias('/user/1', '/bar');
        $this->assertEquals("/users/Dries", $aliasManager->getAliasByPath($path_alias->getPath()), 'English alias still returned after entering a language-neutral alias.');
        // Create a language-specific (xx-lolspeak) alias for the same path.
        $path_alias = $this->createPathAlias('/user/1', '/LOL', 'xx-lolspeak');
        $this->assertEquals("/users/Dries", $aliasManager->getAliasByPath($path_alias->getPath()), 'English alias still returned after entering a LOLspeak alias.');
        // The LOLspeak alias should be returned if we really want LOLspeak.
        $this->assertEquals('/LOL', $aliasManager->getAliasByPath($path_alias->getPath(), 'xx-lolspeak'), 'LOLspeak alias returned if we specify xx-lolspeak to the alias manager.');
        // Create a new alias for this path in English, which should override the
        // previous alias for "user/1".
        $path_alias = $this->createPathAlias('/user/1', '/users/my-new-path', 'en');
        $this->assertEquals($path_alias->getAlias(), $aliasManager->getAliasByPath($path_alias->getPath()), 'Recently created English alias returned.');
        $this->assertEquals($path_alias->getPath(), $aliasManager->getPathByAlias($path_alias->getAlias()), 'Recently created English source returned.');
        // Remove the English aliases, which should cause a fallback to the most
        // recently created language-neutral alias, 'bar'.
        $path_alias_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('path_alias');
        $entities = $path_alias_storage->loadByProperties([
            'langcode' => 'en',
        ]);
        $path_alias_storage->delete($entities);
        $this->assertEquals('/bar', $aliasManager->getAliasByPath($path_alias->getPath()), 'Path lookup falls back to recently created language-neutral alias.');
        // Test the situation where the alias and language are the same, but
        // the source differs. The newer alias record should be returned.
        $this->createPathAlias('/user/2', '/bar');
        $aliasManager->cacheClear();
        $this->assertEquals('/user/2', $aliasManager->getPathByAlias('/bar'), 'Newer alias record is returned when comparing two LanguageInterface::LANGCODE_NOT_SPECIFIED paths with the same alias.');
    }
    
    /**
     * Tests the alias whitelist.
     */
    public function testWhitelist() {
        $memoryCounterBackend = new MemoryCounterBackend();
        // Create AliasManager and Path object.
        $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container
            ->get('lock'), $this->container
            ->get('state'), $this->container
            ->get('path_alias.repository'));
        $aliasManager = new AliasManager($this->container
            ->get('path_alias.repository'), $whitelist, $this->container
            ->get('language_manager'), $memoryCounterBackend);
        // No alias for user and admin yet, so should be NULL.
        $this->assertNull($whitelist->get('user'));
        $this->assertNull($whitelist->get('admin'));
        // Non-existing path roots should be NULL too. Use a length of 7 to avoid
        // possible conflict with random aliases below.
        $this->assertNull($whitelist->get($this->randomMachineName()));
        // Add an alias for user/1, user should get whitelisted now.
        $this->createPathAlias('/user/1', '/' . $this->randomMachineName());
        $aliasManager->cacheClear();
        $this->assertTrue($whitelist->get('user'));
        $this->assertNull($whitelist->get('admin'));
        $this->assertNull($whitelist->get($this->randomMachineName()));
        // Add an alias for admin, both should get whitelisted now.
        $this->createPathAlias('/admin/something', '/' . $this->randomMachineName());
        $aliasManager->cacheClear();
        $this->assertTrue($whitelist->get('user'));
        $this->assertTrue($whitelist->get('admin'));
        $this->assertNull($whitelist->get($this->randomMachineName()));
        // Remove the user alias again, whitelist entry should be removed.
        $path_alias_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('path_alias');
        $entities = $path_alias_storage->loadByProperties([
            'path' => '/user/1',
        ]);
        $path_alias_storage->delete($entities);
        $aliasManager->cacheClear();
        $this->assertNull($whitelist->get('user'));
        $this->assertTrue($whitelist->get('admin'));
        $this->assertNull($whitelist->get($this->randomMachineName()));
        // Destruct the whitelist so that the caches are written.
        $whitelist->destruct();
        $this->assertEqual($memoryCounterBackend->getCounter('set', 'path_alias_whitelist'), 1);
        $memoryCounterBackend->resetCounter();
        // Re-initialize the whitelist using the same cache backend, should load
        // from cache.
        $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container
            ->get('lock'), $this->container
            ->get('state'), $this->container
            ->get('path_alias.repository'));
        $this->assertNull($whitelist->get('user'));
        $this->assertTrue($whitelist->get('admin'));
        $this->assertNull($whitelist->get($this->randomMachineName()));
        $this->assertEqual($memoryCounterBackend->getCounter('get', 'path_alias_whitelist'), 1);
        $this->assertEqual($memoryCounterBackend->getCounter('set', 'path_alias_whitelist'), 0);
        // Destruct the whitelist, should not attempt to write the cache again.
        $whitelist->destruct();
        $this->assertEqual($memoryCounterBackend->getCounter('get', 'path_alias_whitelist'), 1);
        $this->assertEqual($memoryCounterBackend->getCounter('set', 'path_alias_whitelist'), 0);
    }
    
    /**
     * Tests situation where the whitelist cache is deleted mid-request.
     */
    public function testWhitelistCacheDeletionMidRequest() {
        $memoryCounterBackend = new MemoryCounterBackend();
        // Create AliasManager and Path object.
        $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container
            ->get('lock'), $this->container
            ->get('state'), $this->container
            ->get('path_alias.repository'));
        // Whitelist cache should not exist at all yet.
        $this->assertFalse($memoryCounterBackend->get('path_alias_whitelist'));
        // Add some aliases for both menu routes we have.
        $this->createPathAlias('/admin/something', '/' . $this->randomMachineName());
        $this->createPathAlias('/user/something', '/' . $this->randomMachineName());
        // Lookup admin path in whitelist. It will query the DB and figure out
        // that it indeed has an alias, and add it to the internal whitelist and
        // flag it to be persisted to cache.
        $this->assertTrue($whitelist->get('admin'));
        // Destruct the whitelist so it persists its cache.
        $whitelist->destruct();
        $this->assertEquals($memoryCounterBackend->getCounter('set', 'path_alias_whitelist'), 1);
        // Cache data should have data for 'user' and 'admin', even though just
        // 'admin' was looked up. This is because the cache is primed with all
        // menu router base paths.
        $this->assertEquals([
            'user' => FALSE,
            'admin' => TRUE,
        ], $memoryCounterBackend->get('path_alias_whitelist')->data);
        $memoryCounterBackend->resetCounter();
        // Re-initialize the whitelist and lookup an alias for the 'user' path.
        // Whitelist should load data from its cache, see that it hasn't done a
        // check for 'user' yet, perform the check, then mark the result to be
        // persisted to cache.
        $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container
            ->get('lock'), $this->container
            ->get('state'), $this->container
            ->get('path_alias.repository'));
        $this->assertTrue($whitelist->get('user'));
        // Delete the whitelist cache. This could happen from an outside process,
        // like a code deployment that performs a cache rebuild.
        $memoryCounterBackend->delete('path_alias_whitelist');
        // Destruct whitelist so it attempts to save the whitelist data to cache.
        // However it should recognize that the previous cache entry was deleted
        // from underneath it and not save anything to cache, to protect from
        // cache corruption.
        $whitelist->destruct();
        $this->assertEquals($memoryCounterBackend->getCounter('set', 'path_alias_whitelist'), 0);
        $this->assertFalse($memoryCounterBackend->get('path_alias_whitelist'));
        $memoryCounterBackend->resetCounter();
    }

}