verifyDynamicPageCache example

// Add cron to the default shortcut set, now the shortcut list cache tag     // is expected.     $this->drupalGet('admin/config/system/cron');
    $this->clickLink('Add to Default shortcuts');
    $expected_cache_tags[] = 'config:shortcut_set_list';
    $this->assertCacheTags($expected_cache_tags);

    // Verify that users without the 'access shortcuts' permission can't see the     // shortcuts.     $this->drupalLogin($this->drupalCreateUser(['access toolbar']));
    $this->assertSession()->linkNotExists('Shortcuts');
    $this->verifyDynamicPageCache($test_page_url, 'MISS');
    $this->verifyDynamicPageCache($test_page_url, 'HIT');

    // Verify that users without the 'administer site configuration' permission     // can't see the cron shortcut but can see shortcuts toolbar tab.     $this->drupalLogin($this->drupalCreateUser([
      'access toolbar',
      'access shortcuts',
    ]));
    $this->verifyDynamicPageCache($test_page_url, 'MISS');
    $this->verifyDynamicPageCache($test_page_url, 'HIT');
    $this->assertSession()->linkExists('Shortcuts');