Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser:...

Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser: Replace .tpl.php with .html.twig in documentation.

core/modules/system/lib/Drupal/system/Tests/Theme/HtmlAttributesTest.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\Theme\HtmlAttributesTest.
+ */
+
+namespace Drupal\system\Tests\Theme;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Functional tests for 'html' and 'body' element attributes.
+ */
+class HtmlAttributesTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('theme_test');
+
+  public static function getInfo() {
+    return array(
+      'name' => "'html' and 'body' element attributes",
+      'description' => "Test attributes inserted in the 'html' and 'body' elements on the page.",
+      'group' => 'Theme',
+    );
+  }
+
+  /**
+   * Tests that attributes in the 'html' and 'body' elements can be altered.
+   */
+  function testThemeHtmlAttributes() {
+    $this->drupalGet('');
+    $attributes = $this->xpath('/html[@theme_test_html_attribute="theme test html attribute value"]');
+    $this->assertTrue(count($attributes) == 1, "Attribute set in the 'html' element via hook_preprocess_HOOK() found.");
+    $attributes = $this->xpath('/html/body[@theme_test_body_attribute="theme test body attribute value"]');
+    $this->assertTrue(count($attributes) == 1, "Attribute set in the 'body' element via hook_preprocess_HOOK() found.");
+  }
+}