ControllerBaseTest.php

<?php

namespace Drupal\Tests\Core\Controller;

use Drupal\Tests\UnitTestCase;

/**
 * Tests that the base controller class.
 *
 * @group Controller
 */
class ControllerBaseTest extends UnitTestCase {
    
    /**
     * The tested controller base class.
     *
     * @var \Drupal\Core\Controller\ControllerBase|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $controllerBase;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        $this->controllerBase = $this->getMockForAbstractClass('Drupal\\Core\\Controller\\ControllerBase');
    }
    
    /**
     * Tests the config method.
     */
    public function testGetConfig() {
        $config_factory = $this->getConfigFactoryStub([
            'config_name' => [
                'key' => 'value',
            ],
            'config_name2' => [
                'key2' => 'value2',
            ],
        ]);
        $container = $this->createMock('Symfony\\Component\\DependencyInjection\\ContainerInterface');
        $container->expects($this->once())
            ->method('get')
            ->with('config.factory')
            ->willReturn($config_factory);
        \Drupal::setContainer($container);
        $config_method = new \ReflectionMethod('Drupal\\Core\\Controller\\ControllerBase', 'config');
        $config_method->setAccessible(TRUE);
        // Call config twice to ensure that the container is just called once.
        $config = $config_method->invoke($this->controllerBase, 'config_name');
        $this->assertEquals('value', $config->get('key'));
        $config = $config_method->invoke($this->controllerBase, 'config_name2');
        $this->assertEquals('value2', $config->get('key2'));
    }

}