--- /dev/null
+<?php
+
+namespace Drupal\Tests\node\Functional;
+
+/**
+ * Tests node template suggestions.
+ *
+ * @group node
+ */
+class NodeTemplateSuggestionsTest extends NodeTestBase {
+
+ /**
+ * 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.
+ $build = \Drupal::entityManager()->getViewBuilder('node')->view($node, $view_mode);
+
+ $variables['elements'] = $build;
+ $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', [$variables]);
+
+ $this->assertEqual($suggestions, ['node__full', 'node__page', 'node__page__full', 'node__' . $node->id(), 'node__' . $node->id() . '__full'], 'Found expected node suggestions.');
+
+ // Change the view mode.
+ $view_mode = 'node.my_custom_view_mode';
+ $build = \Drupal::entityManager()->getViewBuilder('node')->view($node, $view_mode);
+
+ $variables['elements'] = $build;
+ $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', [$variables]);
+
+ $this->assertEqual($suggestions, ['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'], 'Found expected node suggestions.');
+ }
+
+}