SystemListingTest.php

<?php

namespace Drupal\Tests\system\Kernel\Common;

use Drupal\Component\Render\FormattableMarkup;
use Drupal\Core\Extension\ExtensionDiscovery;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests scanning system directories in drupal_system_listing().
 *
 * @group Common
 */
class SystemListingTest extends KernelTestBase {
    
    /**
     * Tests that files in different directories take precedence as expected.
     */
    public function testDirectoryPrecedence() {
        // Define the module files we will search for, and the directory precedence
        // we expect.
        $expected_directories = [
            // When both copies of the module are compatible with Drupal core, the
            // copy in the profile directory takes precedence.
'drupal_system_listing_compatible_test' => [
                'core/profiles/testing/modules',
                'core/modules/system/tests/modules',
            ],
        ];
        // This test relies on two versions of the same module existing in
        // different places in the filesystem. Without that, the test has no
        // meaning, so assert their presence first.
        foreach ($expected_directories as $module => $directories) {
            foreach ($directories as $directory) {
                $filename = "{$directory}/{$module}/{$module}.info.yml";
                $this->assertFileExists($this->root . '/' . $filename);
            }
        }
        // Now scan the directories and check that the files take precedence as
        // expected.
        $listing = new ExtensionDiscovery($this->root);
        $listing->setProfileDirectories([
            'core/profiles/testing',
        ]);
        $files = $listing->scan('module');
        foreach ($expected_directories as $module => $directories) {
            $expected_directory = array_shift($directories);
            $expected_uri = "{$expected_directory}/{$module}/{$module}.info.yml";
            $this->assertEqual($files[$module]->getPathname(), $expected_uri, new FormattableMarkup('Module @actual was found at @expected.', [
                '@actual' => $files[$module]->getPathname(),
                '@expected' => $expected_uri,
            ]));
        }
    }
    
    /**
     * Tests that directories matching file_scan_ignore_directories are ignored
     */
    public function testFileScanIgnoreDirectory() {
        $listing = new ExtensionDiscovery($this->root, FALSE);
        $listing->setProfileDirectories([
            'core/profiles/testing',
        ]);
        $files = $listing->scan('module');
        $this->assertArrayHasKey('drupal_system_listing_compatible_test', $files);
        // Reset the static to force a rescan of the directories.
        $reflected_class = new \ReflectionClass(ExtensionDiscovery::class);
        $reflected_property = $reflected_class->getProperty('files');
        $reflected_property->setAccessible(TRUE);
        $reflected_property->setValue($reflected_class, []);
        $this->setSetting('file_scan_ignore_directories', [
            'drupal_system_listing_compatible_test',
        ]);
        $listing = new ExtensionDiscovery($this->root, FALSE);
        $listing->setProfileDirectories([
            'core/profiles/testing',
        ]);
        $files = $listing->scan('module');
        $this->assertArrayNotHasKey('drupal_system_listing_compatible_test', $files);
    }

}