Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/search/src/Tests/SearchPageOverrideTest.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\search\Tests\SearchPageOverrideTest.
+ */
+
+namespace Drupal\search\Tests;
+
+/**
+ * Tests if the result page can be overridden.
+ *
+ * Verifies that a plugin can override the buildResults() method to
+ * control what the search results page looks like.
+ *
+ * @group search
+ */
+class SearchPageOverrideTest extends SearchTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('search_extra_type');
+
+  /**
+   * A user with permission to administer search.
+   *
+   * @var \Drupal\user\UserInterface
+   */
+  public $searchUser;
+
+  protected function setUp() {
+    parent::setUp();
+
+    // Login as a user that can create and search content.
+    $this->searchUser = $this->drupalCreateUser(array('search content', 'administer search'));
+    $this->drupalLogin($this->searchUser);
+  }
+
+  function testSearchPageHook() {
+    $keys = 'bike shed ' . $this->randomMachineName();
+    $this->drupalGet("search/dummy_path", array('query' => array('keys' => $keys)));
+    $this->assertText('Dummy search snippet', 'Dummy search snippet is shown');
+    $this->assertText('Test page text is here', 'Page override is working');
+  }
+}