WorkspaceCacheContext example

  public function testWorkspaceCacheContext() {
    $renderer = \Drupal::service('renderer');
    $cache_contexts_manager = \Drupal::service("cache_contexts_manager");

    // Check that the 'workspace' cache context is present when the module is     // installed.     $this->drupalGet('<front>');
    $this->assertCacheContext('workspace');

    $cache_context = new WorkspaceCacheContext(\Drupal::service('workspaces.manager'));
    $this->assertSame('live', $cache_context->getContext());

    // Create a node and check that its render array contains the proper cache     // context.     $this->drupalCreateContentType(['type' => 'page']);
    $node = $this->createNode();

    // Get a fully built entity view render array.     $build = \Drupal::entityTypeManager()->getViewBuilder('node')->view($node, 'full');

    // Render it so the default cache contexts are applied.