7 invocations of hook_update_index()

SearchExactTestCase::testExactQuery in drupal/modules/search/search.test
Tests that the correct number of pager links are found for both keywords and phrases.
SearchNodeAccessTest::testPhraseSearchPunctuation in drupal/modules/search/search.test
Tests that search works with punctuation and HTML entities.
SearchNodeTagTest::testNodeSearchQueryTags in drupal/modules/search/search.test
Tests that the correct tags are available and hooks invoked.
SearchRankingTestCase::testDoubleRankings in drupal/modules/search/search.test
Verifies that if we combine two rankings, search still works.
SearchRankingTestCase::testHTMLRankings in drupal/modules/search/search.test
Test rankings of HTML tags.
SearchRankingTestCase::testRankings in drupal/modules/search/search.test
search_cron in drupal/modules/search/search.module
Implements hook_cron().