Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Tests\block\Functional;
Chris@0: 
Chris@0: use Drupal\Tests\BrowserTestBase;
Chris@0: 
Chris@0: /**
Chris@0:  * Tests block module's installation.
Chris@0:  *
Chris@0:  * @group block
Chris@0:  */
Chris@0: class BlockInstallTest extends BrowserTestBase {
Chris@0: 
Chris@0:   public function testCacheTagInvalidationUponInstallation() {
Chris@0:     // Warm the page cache.
Chris@0:     $this->drupalGet('');
Chris@0:     $this->assertNoText('Powered by Drupal');
Chris@17:     $this->assertSession()->responseHeaderNotContains('X-Drupal-Cache-Tags', 'config:block_list');
Chris@0: 
Chris@0:     // Install the block module, and place the "Powered by Drupal" block.
Chris@0:     $this->container->get('module_installer')->install(['block', 'shortcut']);
Chris@0:     $this->rebuildContainer();
Chris@0:     $this->container->get('router.builder')->rebuild();
Chris@0:     $this->drupalPlaceBlock('system_powered_by_block');
Chris@0: 
Chris@0:     // Check the same page, block.module's hook_install() should have
Chris@0:     // invalidated the 'rendered' cache tag to make blocks show up.
Chris@0:     $this->drupalGet('');
Chris@0:     $this->assertCacheTag('config:block_list');
Chris@0:     $this->assertText('Powered by Drupal');
Chris@0:   }
Chris@0: 
Chris@0: }