ConfigModuleOverridesTest.php

<?php

namespace Drupal\KernelTests\Core\Config;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests module overrides of configuration using event subscribers.
 *
 * @group config
 */
class ConfigModuleOverridesTest extends KernelTestBase {
    
    /**
     * Modules to install.
     *
     * @var array
     */
    protected static $modules = [
        'system',
        'config',
        'config_override_test',
    ];
    public function testSimpleModuleOverrides() {
        $GLOBALS['config_test_run_module_overrides'] = TRUE;
        $name = 'system.site';
        $overridden_name = 'ZOMG overridden site name';
        $non_overridden_name = 'ZOMG this name is on disk mkay';
        $overridden_slogan = 'Yay for overrides!';
        $non_overridden_slogan = 'Yay for defaults!';
        $config_factory = $this->container
            ->get('config.factory');
        $config_factory->getEditable($name)
            ->set('name', $non_overridden_name)
            ->set('slogan', $non_overridden_slogan)
            ->save();
        $this->assertEquals($non_overridden_name, $config_factory->get('system.site')
            ->getOriginal('name', FALSE));
        $this->assertEquals($non_overridden_slogan, $config_factory->get('system.site')
            ->getOriginal('slogan', FALSE));
        $this->assertEquals($overridden_name, $config_factory->get('system.site')
            ->get('name'));
        $this->assertEquals($overridden_slogan, $config_factory->get('system.site')
            ->get('slogan'));
        // Test overrides of completely new configuration objects. In normal runtime
        // this should only happen for configuration entities as we should not be
        // creating simple configuration objects on the fly.
        $config = $config_factory->get('config_override_test.new');
        $this->assertTrue($config->isNew(), 'The configuration object config_override_test.new is new');
        $this->assertSame('override', $config->get('module'));
        $this->assertNull($config->getOriginal('module', FALSE));
        unset($GLOBALS['config_test_run_module_overrides']);
    }

}