Issue #2098015 by slv_: Fixed Node delete is not correctly removing search information; node update is using a hook instead of method.

core/modules/node/lib/Drupal/node/Entity/Node.php

@@ -125,6 +125,12 @@ class Node extends ContentEntityBase implements NodeInterface {
     if ($this->isDefaultRevision()) {
       \Drupal::entityManager()->getAccessController('node')->writeGrants($this, $update);
     }
+
+    // Reindex the node when it is updated. The node is automatically indexed
+    // when it is added, simply by being added to the node table.
+    if ($update) {
+      node_reindex_node_search($this->id());
+    }
   }
 
   /**
@@ -133,9 +139,10 @@ class Node extends ContentEntityBase implements NodeInterface {
   public static function preDelete(EntityStorageControllerInterface $storage_controller, array $entities) {
     parent::preDelete($storage_controller, $entities);
 
-    if (module_exists('search')) {
+    // Assure that all nodes deleted are removed from the search index.
+    if (\Drupal::moduleHandler()->moduleExists('search')) {
       foreach ($entities as $entity) {
-        search_reindex($entity->nid->value, 'node');
+        search_reindex($entity->nid->value, 'node_search');
       }
     }
   }

core/modules/node/node.module

@@ -2122,15 +2122,6 @@ function node_reindex_node_search($nid) {
   }
 }
 
-/**
- * Implements hook_node_update().
- */
-function node_node_update(EntityInterface $node) {
-  // Reindex the node when it is updated. The node is automatically indexed
-  // when it is added, simply by being added to the node table.
-  node_reindex_node_search($node->id());
-}
-
 /**
  * Implements hook_comment_insert().
  */

core/modules/search/lib/Drupal/search/Tests/SearchNodeUpdateAndDeletionTest.php

@@ -0,0 +1,111 @@
+<?php
+/**
+ * @file
+ * Definition of Drupal\search\Tests\SearchNodeUpdateAndDeletionTest.
+ */
+
+namespace Drupal\search\Tests;
+
+/**
+ * Tests search index info is updated properly on node updates / deletions.
+ */
+class SearchNodeUpdateAndDeletionTest extends SearchTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array();
+
+  public $test_user;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Search index synchronization on node updating / removal',
+      'description' => 'Tests search index is updated properly when nodes are removed or updated.',
+      'group' => 'Search',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+
+    // Create a test user and log in.
+    $this->test_user = $this->drupalCreateUser(array('access content', 'search content'));
+    $this->drupalLogin($this->test_user);
+  }
+
+  /**
+   * Tests that the search index info is properly updated when a node changes.
+   */
+  function testSearchIndexUpdateOnNodeChange() {
+    // Create a node.
+    $node = $this->drupalCreateNode(array(
+      'title' => 'Someone who says Ni!',
+      'body' => array(array('value' => "We are the knights who say Ni!")),
+      'type' => 'page'));
+
+    $node_search_plugin = $this->container->get('plugin.manager.search')->createInstance('node_search');
+    // Update the search index.
+    $node_search_plugin->updateIndex();
+    search_update_totals();
+
+    // Search the node to verify it appears in search results
+    $edit = array('keys' => 'knights');
+    $this->drupalPostForm('search/node', $edit, t('Search'));
+    $this->assertText($node->label());
+
+    // Update the node
+    $node->body->value = "We want a shrubbery!";
+    $node->save();
+
+    // Run indexer again
+    $node_search_plugin->updateIndex();
+    search_update_totals();
+
+    // Search again to verify the new text appears in test results.
+    $edit = array('keys' => 'shrubbery');
+    $this->drupalPostForm('search/node', $edit, t('Search'));
+    $this->assertText($node->label());
+  }
+
+  /**
+   * Tests that the search index info is updated when a node is deleted.
+   */
+  function testSearchIndexUpdateOnNodeDeletion() {
+    // Create a node.
+    $node = $this->drupalCreateNode(array(
+      'title' => 'No dragons here',
+      'body' => array(array('value' => 'Again: No dragons here')),
+      'type' => 'page'));
+
+    $node_search_plugin = $this->container->get('plugin.manager.search')->createInstance('node_search');
+    // Update the search index.
+    $node_search_plugin->updateIndex();
+    search_update_totals();
+
+    // Search the node to verify it appears in search results
+    $edit = array('keys' => 'dragons');
+    $this->drupalPostForm('search/node', $edit, t('Search'));
+    $this->assertText($node->label());
+
+    // Get the node info from the search index tables.
+    $search_index_dataset = db_query("SELECT sid FROM {search_index} WHERE type = 'node_search' AND  word = :word", array(':word' => 'dragons'))
+      ->fetchField();
+    $this->assertNotEqual($search_index_dataset, FALSE, t('Node info found on the search_index'));
+
+    // Delete the node.
+    $node->delete();
+
+    // Check if the node info is gone from the search table.
+    $search_index_dataset = db_query("SELECT sid FROM {search_index} WHERE type = 'node_search' AND  word = :word", array(':word' => 'dragons'))
+      ->fetchField();
+    $this->assertFalse($search_index_dataset, t('Node info successfully removed from search_index'));
+
+    // Search again to verify the node doesn't appear anymore.
+    $this->drupalPostForm('search/node', $edit, t('Search'));
+    $this->assertNoText($node->label());
+  }
+
+}