NodeTemplateSuggestionsTest.php

<?php

namespace Drupal\Tests\node\Functional;


/**
 * Tests node template suggestions.
 *
 * @group node
 */
class NodeTemplateSuggestionsTest extends NodeTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests if template_preprocess_node() generates the correct suggestions.
     */
    public function testNodeThemeHookSuggestions() {
        // Create node to be rendered.
        $node = $this->drupalCreateNode();
        $view_mode = 'full';
        // Simulate theming of the node.
        $build = \Drupal::entityTypeManager()->getViewBuilder('node')
            ->view($node, $view_mode);
        $variables['elements'] = $build;
        $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', [
            $variables,
        ]);
        $this->assertEquals([
            'node__full',
            'node__page',
            'node__page__full',
            'node__' . $node->id(),
            'node__' . $node->id() . '__full',
        ], $suggestions, 'Found expected node suggestions.');
        // Change the view mode.
        $view_mode = 'node.my_custom_view_mode';
        $build = \Drupal::entityTypeManager()->getViewBuilder('node')
            ->view($node, $view_mode);
        $variables['elements'] = $build;
        $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', [
            $variables,
        ]);
        $this->assertEquals([
            'node__node_my_custom_view_mode',
            'node__page',
            'node__page__node_my_custom_view_mode',
            'node__' . $node->id(),
            'node__' . $node->id() . '__node_my_custom_view_mode',
        ], $suggestions, 'Found expected node suggestions.');
    }

}