ContainerRebuildWebTest.php

<?php

namespace Drupal\Tests\system\Functional\DrupalKernel;

use Drupal\Tests\BrowserTestBase;

/**
 * Ensures that the container rebuild works as expected.
 *
 * @group DrupalKernel
 */
class ContainerRebuildWebTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'service_provider_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Sets a different deployment identifier.
     */
    public function testSetContainerRebuildWithDifferentDeploymentIdentifier() {
        $assert = $this->assertSession();
        // Ensure the parameter is not set.
        $this->drupalGet('<front>');
        $assert->responseHeaderEquals('container_rebuild_indicator', NULL);
        $this->writeSettings([
            'settings' => [
                'deployment_identifier' => (object) [
                    'value' => 'new-identifier',
                    'required' => TRUE,
                ],
            ],
        ]);
        $this->drupalGet('<front>');
        $assert->responseHeaderEquals('container_rebuild_indicator', 'new-identifier');
    }
    
    /**
     * Tests container invalidation.
     */
    public function testContainerInvalidation() {
        $assert = $this->assertSession();
        // Ensure that parameter is not set.
        $this->drupalGet('<front>');
        $assert->responseHeaderEquals('container_rebuild_test_parameter', NULL);
        // Ensure that after setting the parameter, without a container rebuild the
        // parameter is still not set.
        $this->writeSettings([
            'settings' => [
                'container_rebuild_test_parameter' => (object) [
                    'value' => 'rebuild_me_please',
                    'required' => TRUE,
                ],
            ],
        ]);
        $this->drupalGet('<front>');
        $assert->responseHeaderEquals('container_rebuild_test_parameter', NULL);
        // Ensure that after container invalidation the parameter is set.
        \Drupal::service('kernel')->invalidateContainer();
        $this->drupalGet('<front>');
        $assert->responseHeaderEquals('container_rebuild_test_parameter', 'rebuild_me_please');
    }

}