DependencyHookInvocationTest.php

<?php

namespace Drupal\Tests\system\Functional\UpdateSystem;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests that the hook invocation for determining update dependencies works
 * correctly.
 *
 * @group Update
 */
class DependencyHookInvocationTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'update_test_0',
        'update_test_1',
        'update_test_2',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    protected function setUp() {
        parent::setUp();
        require_once $this->root . '/core/includes/update.inc';
    }
    
    /**
     * Test the structure of the array returned by hook_update_dependencies().
     */
    public function testHookUpdateDependencies() {
        $update_dependencies = update_retrieve_dependencies();
        $this->assertTrue($update_dependencies['update_test_0'][8001]['update_test_1'] == 8001, 'An update function that has a dependency on two separate modules has the first dependency recorded correctly.');
        $this->assertTrue($update_dependencies['update_test_0'][8001]['update_test_2'] == 8002, 'An update function that has a dependency on two separate modules has the second dependency recorded correctly.');
        $this->assertTrue($update_dependencies['update_test_0'][8002]['update_test_1'] == 8003, '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.');
    }

}