<?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);

  }

}