--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/modules/simpletest/tests/pager.test	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,159 @@
+<?php
+
+/**
+ * @file
+ * Tests for pager functionality.
+ */
+
+/**
+ * Tests pager functionality.
+ */
+class PagerFunctionalWebTestCase extends DrupalWebTestCase {
+  protected $profile = 'testing';
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Pager functionality',
+      'description' => 'Tests pager functionality.',
+      'group' => 'Pager',
+    );
+  }
+
+  function setUp() {
+    parent::setUp(array('dblog'));
+
+    // Insert 300 log messages.
+    for ($i = 0; $i < 300; $i++) {
+      watchdog('pager_test', $this->randomString(), NULL, WATCHDOG_DEBUG);
+    }
+
+    $this->admin_user = $this->drupalCreateUser(array(
+      'access site reports',
+    ));
+    $this->drupalLogin($this->admin_user);
+  }
+
+  /**
+   * Tests markup and CSS classes of pager links.
+   */
+  function testActiveClass() {
+    // Verify first page.
+    $this->drupalGet('admin/reports/dblog');
+    $current_page = 0;
+    $this->assertPagerItems($current_page);
+
+    // Verify any page but first/last.
+    $current_page++;
+    $this->drupalGet('admin/reports/dblog', array('query' => array('page' => $current_page)));
+    $this->assertPagerItems($current_page);
+
+    // Verify last page.
+    $elements = $this->xpath('//li[contains(@class, :class)]/a', array(':class' => 'pager-last'));
+    preg_match('@page=(\d+)@', $elements[0]['href'], $matches);
+    $current_page = (int) $matches[1];
+    $this->drupalGet($GLOBALS['base_root'] . $elements[0]['href'], array('external' => TRUE));
+    $this->assertPagerItems($current_page);
+  }
+
+  /**
+   * Asserts pager items and links.
+   *
+   * @param int $current_page
+   *   The current pager page the internal browser is on.
+   */
+  protected function assertPagerItems($current_page) {
+    $elements = $this->xpath('//ul[@class=:class]/li', array(':class' => 'pager'));
+    $this->assertTrue(!empty($elements), 'Pager found.');
+
+    // Make current page 1-based.
+    $current_page++;
+
+    // Extract first/previous and next/last items.
+    // first/previous only exist, if the current page is not the first.
+    if ($current_page > 1) {
+      $first = array_shift($elements);
+      $previous = array_shift($elements);
+    }
+    // next/last always exist, unless the current page is the last.
+    if ($current_page != count($elements)) {
+      $last = array_pop($elements);
+      $next = array_pop($elements);
+    }
+
+    // Verify items and links to pages.
+    foreach ($elements as $page => $element) {
+      // Make item/page index 1-based.
+      $page++;
+      if ($current_page == $page) {
+        $this->assertClass($element, 'pager-current', 'Item for current page has .pager-current class.');
+        $this->assertFalse(isset($element->a), 'Item for current page has no link.');
+      }
+      else {
+        $this->assertNoClass($element, 'pager-current', "Item for page $page has no .pager-current class.");
+        $this->assertClass($element, 'pager-item', "Item for page $page has .pager-item class.");
+        $this->assertTrue($element->a, "Link to page $page found.");
+        $this->assertNoClass($element->a, 'active', "Link to page $page is not active.");
+      }
+      unset($elements[--$page]);
+    }
+    // Verify that no other items remain untested.
+    $this->assertTrue(empty($elements), 'All expected items found.');
+
+    // Verify first/previous and next/last items and links.
+    if (isset($first)) {
+      $this->assertClass($first, 'pager-first', 'Item for first page has .pager-first class.');
+      $this->assertTrue($first->a, 'Link to first page found.');
+      $this->assertNoClass($first->a, 'active', 'Link to first page is not active.');
+    }
+    if (isset($previous)) {
+      $this->assertClass($previous, 'pager-previous', 'Item for first page has .pager-previous class.');
+      $this->assertTrue($previous->a, 'Link to previous page found.');
+      $this->assertNoClass($previous->a, 'active', 'Link to previous page is not active.');
+    }
+    if (isset($next)) {
+      $this->assertClass($next, 'pager-next', 'Item for next page has .pager-next class.');
+      $this->assertTrue($next->a, 'Link to next page found.');
+      $this->assertNoClass($next->a, 'active', 'Link to next page is not active.');
+    }
+    if (isset($last)) {
+      $this->assertClass($last, 'pager-last', 'Item for last page has .pager-last class.');
+      $this->assertTrue($last->a, 'Link to last page found.');
+      $this->assertNoClass($last->a, 'active', 'Link to last page is not active.');
+    }
+  }
+
+  /**
+   * Asserts that an element has a given class.
+   *
+   * @param SimpleXMLElement $element
+   *   The element to test.
+   * @param string $class
+   *   The class to assert.
+   * @param string $message
+   *   (optional) A verbose message to output.
+   */
+  protected function assertClass(SimpleXMLElement $element, $class, $message = NULL) {
+    if (!isset($message)) {
+      $message = "Class .$class found.";
+    }
+    $this->assertTrue(strpos($element['class'], $class) !== FALSE, $message);
+  }
+
+  /**
+   * Asserts that an element does not have a given class.
+   *
+   * @param SimpleXMLElement $element
+   *   The element to test.
+   * @param string $class
+   *   The class to assert.
+   * @param string $message
+   *   (optional) A verbose message to output.
+   */
+  protected function assertNoClass(SimpleXMLElement $element, $class, $message = NULL) {
+    if (!isset($message)) {
+      $message = "Class .$class not found.";
+    }
+    $this->assertTrue(strpos($element['class'], $class) === FALSE, $message);
+  }
+}
+