DependencyHookInvocationTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Functional\UpdateSystem;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests the hook invocation for determining update dependencies.
 *
 * @group Update
 */
class DependencyHookInvocationTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'update_test_0',
        'update_test_1',
        'update_test_2',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        require_once $this->root . '/core/includes/update.inc';
    }
    
    /**
     * Tests the structure of the array returned by hook_update_dependencies().
     */
    public function testHookUpdateDependencies() : void {
        $update_dependencies = update_retrieve_dependencies();
        $this->assertSame(8001, $update_dependencies['update_test_0'][8001]['update_test_1'], 'An update function that has a dependency on two separate modules has the first dependency recorded correctly.');
        $this->assertSame(8002, $update_dependencies['update_test_0'][8001]['update_test_2'], 'An update function that has a dependency on two separate modules has the second dependency recorded correctly.');
        $this->assertSame(8003, $update_dependencies['update_test_0'][8002]['update_test_1'], 'An update function that depends on more than one update from the same module only has the dependency on the higher-numbered update function recorded.');
    }

}