materio-base-d7/modules/simpletest/tests/theme.test

<?php

/**
 * @file
 * Tests for the theme API.
 */

/**
 * Unit tests for the Theme API.
 */
class ThemeTestCase extends DrupalWebTestCase {
  protected $profile = 'testing';

  public static function getInfo() {
    return array(
      'name' => 'Theme API',
      'description' => 'Test low-level theme functions.',
      'group' => 'Theme',
    );
  }

  function setUp() {
    parent::setUp('theme_test');
    theme_enable(array('test_theme'));
  }

  /**
   * Test function theme_get_suggestions() for SA-CORE-2009-003.
   */
  function testThemeSuggestions() {
    // Set the front page as something random otherwise the CLI
    // test runner fails.
    variable_set('site_frontpage', 'nobody-home');
    $args = array('node', '1', 'edit');
    $suggestions = theme_get_suggestions($args, 'page');
    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1', 'page__node__edit'), 'Found expected node edit page suggestions');
    // Check attack vectors.
    $args = array('node', '\\1');
    $suggestions = theme_get_suggestions($args, 'page');
    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1'), 'Removed invalid \\ from suggestions');
    $args = array('node', '1/');
    $suggestions = theme_get_suggestions($args, 'page');
    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1'), 'Removed invalid / from suggestions');
    $args = array('node', "1\0");
    $suggestions = theme_get_suggestions($args, 'page');
    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1'), 'Removed invalid \\0 from suggestions');
    // Define path with hyphens to be used to generate suggestions.
    $args = array('node', '1', 'hyphen-path');
    $result = array('page__node', 'page__node__%', 'page__node__1', 'page__node__hyphen_path');
    $suggestions = theme_get_suggestions($args, 'page');
    $this->assertEqual($suggestions, $result, 'Found expected page suggestions for paths containing hyphens.');
  }

  /**
   * Ensures preprocess functions run even for suggestion implementations.
   *
   * The theme hook used by this test has its base preprocess function in a
   * separate file, so this test also ensures that that file is correctly loaded
   * when needed.
   */
  function testPreprocessForSuggestions() {
    // Test with both an unprimed and primed theme registry.
    drupal_theme_rebuild();
    for ($i = 0; $i < 2; $i++) {
      $this->drupalGet('theme-test/suggestion');
      $this->assertText('Theme hook implementor=test_theme_theme_test__suggestion(). Foo=template_preprocess_theme_test', 'Theme hook suggestion ran with data available from a preprocess function for the base hook.');
    }
  }

  /**
   * Ensure page-front template suggestion is added when on front page.
   */
  function testFrontPageThemeSuggestion() {
    $q = $_GET['q'];
    // Set $_GET['q'] to node because theme_get_suggestions() will query it to
    // see if we are on the front page.
    $_GET['q'] = variable_get('site_frontpage', 'node');
    $suggestions = theme_get_suggestions(explode('/', $_GET['q']), 'page');
    // Set it back to not annoy the batch runner.
    $_GET['q'] = $q;
    $this->assertTrue(in_array('page__front', $suggestions), 'Front page template was suggested.');
  }

  /**
   * Ensures theme hook_*_alter() implementations can run before anything is rendered.
   */
  function testAlter() {
    $this->drupalGet('theme-test/alter');
    $this->assertText('The altered data is test_theme_theme_test_alter_alter was invoked.', 'The theme was able to implement an alter hook during page building before anything was rendered.');
  }

  /**
   * Ensures a theme's .info file is able to override a module CSS file from being added to the page.
   *
   * @see test_theme.info
   */
  function testCSSOverride() {
    // Reuse the same page as in testPreprocessForSuggestions(). We're testing
    // what is output to the HTML HEAD based on what is in a theme's .info file,
    // so it doesn't matter what page we get, as long as it is themed with the
    // test theme. First we test with CSS aggregation disabled.
    variable_set('preprocess_css', 0);
    $this->drupalGet('theme-test/suggestion');
    $this->assertNoText('system.base.css', 'The theme\'s .info file is able to override a module CSS file from being added to the page.');

    // Also test with aggregation enabled, simply ensuring no PHP errors are
    // triggered during drupal_build_css_cache() when a source file doesn't
    // exist. Then allow remaining tests to continue with aggregation disabled
    // by default.
    variable_set('preprocess_css', 1);
    $this->drupalGet('theme-test/suggestion');
    variable_set('preprocess_css', 0);
  }

  /**
   * Ensures the theme registry is rebuilt when modules are disabled/enabled.
   */
  function testRegistryRebuild() {
    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'a')), 'a', 'The theme registry contains theme_test_foo.');

    module_disable(array('theme_test'), FALSE);
    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'b')), '', 'The theme registry does not contain theme_test_foo, because the module is disabled.');

    module_enable(array('theme_test'), FALSE);
    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'c')), 'c', 'The theme registry contains theme_test_foo again after re-enabling the module.');
  }

  /**
   * Test the list_themes() function.
   */
  function testListThemes() {
    $themes = list_themes();
    // Check if drupal_theme_access() retrieves enabled themes properly from list_themes().
    $this->assertTrue(drupal_theme_access('test_theme'), 'Enabled theme detected');
    // Check if list_themes() returns disabled themes.
    $this->assertTrue(array_key_exists('test_basetheme', $themes), 'Disabled theme detected');
    // Check for base theme and subtheme lists.
    $base_theme_list = array('test_basetheme' => 'Theme test base theme');
    $sub_theme_list = array('test_subtheme' => 'Theme test subtheme');
    $this->assertIdentical($themes['test_basetheme']->sub_themes, $sub_theme_list, 'Base theme\'s object includes list of subthemes.');
    $this->assertIdentical($themes['test_subtheme']->base_themes, $base_theme_list, 'Subtheme\'s object includes list of base themes.');
    // Check for theme engine in subtheme.
    $this->assertIdentical($themes['test_subtheme']->engine, 'phptemplate', 'Subtheme\'s object includes the theme engine.');
    // Check for theme engine prefix.
    $this->assertIdentical($themes['test_basetheme']->prefix, 'phptemplate', 'Base theme\'s object includes the theme engine prefix.');
    $this->assertIdentical($themes['test_subtheme']->prefix, 'phptemplate', 'Subtheme\'s object includes the theme engine prefix.');
  }

  /**
   * Test the theme_get_setting() function.
   */
  function testThemeGetSetting() {
    $GLOBALS['theme_key'] = 'test_theme';
    $this->assertIdentical(theme_get_setting('theme_test_setting'), 'default value', 'theme_get_setting() uses the default theme automatically.');
    $this->assertNotEqual(theme_get_setting('subtheme_override', 'test_basetheme'), theme_get_setting('subtheme_override', 'test_subtheme'), 'Base theme\'s default settings values can be overridden by subtheme.');
    $this->assertIdentical(theme_get_setting('basetheme_only', 'test_subtheme'), 'base theme value', 'Base theme\'s default settings values are inherited by subtheme.');
  }

  /**
   * Test the drupal_add_region_content() function.
   */
  function testDrupalAddRegionContent() {
    $this->drupalGet('theme-test/drupal-add-region-content');
    $this->assertText('Hello');
    $this->assertText('World');
  }
}

/**
 * Unit tests for theme_table().
 */
class ThemeTableTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Theme Table',
      'description' => 'Tests built-in theme functions.',
      'group' => 'Theme',
    );
  }

  /**
   * Tableheader.js provides 'sticky' table headers, and is included by default.
   */
  function testThemeTableStickyHeaders() {
    $header = array('one', 'two', 'three');
    $rows = array(array(1,2,3), array(4,5,6), array(7,8,9));
    $this->content = theme('table', array('header' => $header, 'rows' => $rows));
    $js = drupal_add_js();
    $this->assertTrue(isset($js['misc/tableheader.js']), 'tableheader.js was included when $sticky = TRUE.');
    $this->assertRaw('sticky-enabled', 'Table has a class of sticky-enabled when $sticky = TRUE.');
    drupal_static_reset('drupal_add_js');
  }

  /**
   * If $sticky is FALSE, no tableheader.js should be included.
   */
  function testThemeTableNoStickyHeaders() {
    $header = array('one', 'two', 'three');
    $rows = array(array(1,2,3), array(4,5,6), array(7,8,9));
    $attributes = array();
    $caption = NULL;
    $colgroups = array();
    $this->content = theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => $attributes, 'caption' => $caption, 'colgroups' => $colgroups, 'sticky' => FALSE));
    $js = drupal_add_js();
    $this->assertFalse(isset($js['misc/tableheader.js']), 'tableheader.js was not included because $sticky = FALSE.');
    $this->assertNoRaw('sticky-enabled', 'Table does not have a class of sticky-enabled because $sticky = FALSE.');
    drupal_static_reset('drupal_add_js');
  }

  /**
   * Tests that the table header is printed correctly even if there are no rows,
   * and that the empty text is displayed correctly.
   */
  function testThemeTableWithEmptyMessage() {
    $header = array(
      t('Header 1'),
      array(
        'data' => t('Header 2'),
        'colspan' => 2,
      ),
    );
    $this->content = theme('table', array('header' => $header, 'rows' => array(), 'empty' => t('No strings available.')));
    $this->assertRaw('<tr class="odd"><td colspan="3" class="empty message">No strings available.</td>', 'Correct colspan was set on empty message.');
    $this->assertRaw('<thead><tr><th>Header 1</th>', 'Table header was printed.');
  }

  /**
   * Tests that the 'no_striping' option works correctly.
   */
  function testThemeTableWithNoStriping() {
    $rows = array(
      array(
        'data' => array(1),
        'no_striping' => TRUE,
      ),
    );
    $this->content = theme('table', array('rows' => $rows));
    $this->assertNoRaw('class="odd"', 'Odd/even classes were not added because $no_striping = TRUE.');
    $this->assertNoRaw('no_striping', 'No invalid no_striping HTML attribute was printed.');
  }
}

/**
 * Unit tests for theme_item_list().
 */
class ThemeItemListUnitTest extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Theme item list',
      'description' => 'Test the theme_item_list() function.',
      'group' => 'Theme',
    );
  }

  /**
   * Test item list rendering.
   */
  function testItemList() {
    $items = array('a', array('data' => 'b', 'children' => array('c' => 'c', 'd' => 'd', 'e' => 'e')), 'f');
    $expected = '<div class="item-list"><ul><li class="first">a</li>
<li>b<div class="item-list"><ul><li class="first">c</li>
<li>d</li>
<li class="last">e</li>
</ul></div></li>
<li class="last">f</li>
</ul></div>';
    $output = theme('item_list', array('items' => $items));
    $this->assertIdentical($expected, $output, 'Item list is rendered correctly.');
  }
}

/**
 * Unit tests for theme_links().
 */
class ThemeLinksTest extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Links',
      'description' => 'Test the theme_links() function and rendering groups of links.',
      'group' => 'Theme',
    );
  }

  /**
   * Test the use of drupal_pre_render_links() on a nested array of links.
   */
  function testDrupalPreRenderLinks() {
    // Define the base array to be rendered, containing a variety of different
    // kinds of links.
    $base_array = array(
      '#theme' => 'links',
      '#pre_render' => array('drupal_pre_render_links'),
      '#links' => array(
        'parent_link' => array(
          'title' => 'Parent link original',
          'href' => 'parent-link-original',
        ),
      ),
      'first_child' => array(
        '#theme' => 'links',
        '#links' => array(
          // This should be rendered if 'first_child' is rendered separately,
          // but ignored if the parent is being rendered (since it duplicates
          // one of the parent's links).
          'parent_link' => array(
            'title' => 'Parent link copy',
            'href' => 'parent-link-copy',
          ),
          // This should always be rendered.
          'first_child_link' => array(
            'title' => 'First child link',
            'href' => 'first-child-link',
          ),
        ),
      ),
      // This should always be rendered as part of the parent.
      'second_child' => array(
        '#theme' => 'links',
        '#links' => array(
          'second_child_link' => array(
            'title' => 'Second child link',
            'href' => 'second-child-link',
          ),
        ),
      ),
      // This should never be rendered, since the user does not have access to
      // it.
      'third_child' => array(
        '#theme' => 'links',
        '#links' => array(
          'third_child_link' => array(
            'title' => 'Third child link',
            'href' => 'third-child-link',
          ),
        ),
        '#access' => FALSE,
      ),
    );

    // Start with a fresh copy of the base array, and try rendering the entire
    // thing. We expect a single <ul> with appropriate links contained within
    // it.
    $render_array = $base_array;
    $html = drupal_render($render_array);
    $dom = new DOMDocument();
    $dom->loadHTML($html);
    $this->assertEqual($dom->getElementsByTagName('ul')->length, 1, 'One "ul" tag found in the rendered HTML.');
    $list_elements = $dom->getElementsByTagName('li');
    $this->assertEqual($list_elements->length, 3, 'Three "li" tags found in the rendered HTML.');
    $this->assertEqual($list_elements->item(0)->nodeValue, 'Parent link original', 'First expected link found.');
    $this->assertEqual($list_elements->item(1)->nodeValue, 'First child link', 'Second expected link found.');
    $this->assertEqual($list_elements->item(2)->nodeValue, 'Second child link', 'Third expected link found.');
    $this->assertIdentical(strpos($html, 'Parent link copy'), FALSE, '"Parent link copy" link not found.');
    $this->assertIdentical(strpos($html, 'Third child link'), FALSE, '"Third child link" link not found.');

    // Now render 'first_child', followed by the rest of the links, and make
    // sure we get two separate <ul>'s with the appropriate links contained
    // within each.
    $render_array = $base_array;
    $child_html = drupal_render($render_array['first_child']);
    $parent_html = drupal_render($render_array);
    // First check the child HTML.
    $dom = new DOMDocument();
    $dom->loadHTML($child_html);
    $this->assertEqual($dom->getElementsByTagName('ul')->length, 1, 'One "ul" tag found in the rendered child HTML.');
    $list_elements = $dom->getElementsByTagName('li');
    $this->assertEqual($list_elements->length, 2, 'Two "li" tags found in the rendered child HTML.');
    $this->assertEqual($list_elements->item(0)->nodeValue, 'Parent link copy', 'First expected link found.');
    $this->assertEqual($list_elements->item(1)->nodeValue, 'First child link', 'Second expected link found.');
    // Then check the parent HTML.
    $dom = new DOMDocument();
    $dom->loadHTML($parent_html);
    $this->assertEqual($dom->getElementsByTagName('ul')->length, 1, 'One "ul" tag found in the rendered parent HTML.');
    $list_elements = $dom->getElementsByTagName('li');
    $this->assertEqual($list_elements->length, 2, 'Two "li" tags found in the rendered parent HTML.');
    $this->assertEqual($list_elements->item(0)->nodeValue, 'Parent link original', 'First expected link found.');
    $this->assertEqual($list_elements->item(1)->nodeValue, 'Second child link', 'Second expected link found.');
    $this->assertIdentical(strpos($parent_html, 'First child link'), FALSE, '"First child link" link not found.');
    $this->assertIdentical(strpos($parent_html, 'Third child link'), FALSE, '"Third child link" link not found.');
  }
}

/**
 * Functional test for initialization of the theme system in hook_init().
 */
class ThemeHookInitTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Theme initialization in hook_init()',
      'description' => 'Tests that the theme system can be correctly initialized in hook_init().',
      'group' => 'Theme',
    );
  }

  function setUp() {
    parent::setUp('theme_test');
  }

  /**
   * Test that the theme system can generate output when called by hook_init().
   */
  function testThemeInitializationHookInit() {
    $this->drupalGet('theme-test/hook-init');
    $this->assertRaw('Themed output generated in hook_init()', 'Themed output generated in hook_init() correctly appears on the page.');
    $this->assertRaw('bartik/css/style.css', "The default theme's CSS appears on the page when the theme system is initialized in hook_init().");
  }
}

/**
 * Tests autocompletion not loading registry.
 */
class ThemeFastTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Theme fast initialization',
      'description' => 'Test that autocompletion does not load the registry.',
      'group' => 'Theme'
    );
  }

  function setUp() {
    parent::setUp('theme_test');
    $this->account = $this->drupalCreateUser(array('access user profiles'));
  }

  /**
   * Tests access to user autocompletion and verify the correct results.
   */
  function testUserAutocomplete() {
    $this->drupalLogin($this->account);
    $this->drupalGet('user/autocomplete/' . $this->account->name);
    $this->assertText('registry not initialized', 'The registry was not initialized');
  }
}

/**
 * Tests the markup of core render element types passed to drupal_render().
 */
class RenderElementTypesTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Render element types',
      'description' => 'Tests the markup of core render element types passed to drupal_render().',
      'group' => 'Theme',
    );
  }

  /**
   * Asserts that an array of elements is rendered properly.
   *
   * @param array $elements
   *   An array of associative arrays describing render elements and their
   *   expected markup. Each item in $elements must contain the following:
   *   - 'name': This human readable description will be displayed on the test
   *     results page.
   *   - 'value': This is the render element to test.
   *   - 'expected': This is the expected markup for the element in 'value'.
   */
  function assertElements($elements) {
    foreach($elements as $element) {
      $this->assertIdentical(drupal_render($element['value']), $element['expected'], '"' . $element['name'] . '" input rendered correctly by drupal_render().');
    }
  }

  /**
   * Tests system #type 'container'.
   */
  function testContainer() {
    $elements = array(
      // Basic container with no attributes.
      array(
        'name' => "#type 'container' with no HTML attributes",
        'value' => array(
          '#type' => 'container',
          'child' => array(
            '#markup' => 'foo',
          ),
        ),
        'expected' => '<div>foo</div>',
      ),
      // Container with a class.
      array(
        'name' => "#type 'container' with a class HTML attribute",
        'value' => array(
          '#type' => 'container',
          'child' => array(
            '#markup' => 'foo',
          ),
          '#attributes' => array(
            'class' => 'bar',
          ),
        ),
        'expected' => '<div class="bar">foo</div>',
      ),
    );

    $this->assertElements($elements);
  }

  /**
   * Tests system #type 'html_tag'.
   */
  function testHtmlTag() {
    $elements = array(
      // Test auto-closure meta tag generation.
      array(
        'name' => "#type 'html_tag' auto-closure meta tag generation",
        'value' => array(
          '#type' => 'html_tag',
          '#tag' => 'meta',
          '#attributes' => array(
            'name' => 'description',
            'content' => 'Drupal test',
          ),
        ),
        'expected' => '<meta name="description" content="Drupal test" />' . "\n",
      ),
      // Test title tag generation.
      array(
        'name' => "#type 'html_tag' title tag generation",
        'value' => array(
          '#type' => 'html_tag',
          '#tag' => 'title',
          '#value' => 'title test',
        ),
        'expected' => '<title>title test</title>' . "\n",
      ),
    );

    $this->assertElements($elements);
  }
}

/**
 * Tests for the ThemeRegistry class.
 */
class ThemeRegistryTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'ThemeRegistry',
      'description' => 'Tests the behavior of the ThemeRegistry class',
      'group' => 'Theme',
    );
  }
  function setUp() {
    parent::setUp('theme_test');
  }

  /**
   * Tests the behavior of the theme registry class.
   */
  function testRaceCondition() {
    $_SERVER['REQUEST_METHOD'] = 'GET';
    $cid = 'test_theme_registry';

    // Directly instantiate the theme registry, this will cause a base cache
    // entry to be written in __construct().
    $registry = new ThemeRegistry($cid, 'cache');

    $this->assertTrue(cache_get($cid), 'Cache entry was created.');

    // Trigger a cache miss for an offset.
    $this->assertTrue($registry['theme_test_template_test'], 'Offset was returned correctly from the theme registry.');
    // This will cause the ThemeRegistry class to write an updated version of
    // the cache entry when it is destroyed, usually at the end of the request.
    // Before that happens, manually delete the cache entry we created earlier
    // so that the new entry is written from scratch.
    cache_clear_all($cid, 'cache');

    // Destroy the class so that it triggers a cache write for the offset.
    unset($registry);

    $this->assertTrue(cache_get($cid), 'Cache entry was created.');

    // Create a new instance of the class. Confirm that both the offset
    // requested previously, and one that has not yet been requested are both
    // available.
    $registry = new ThemeRegistry($cid, 'cache');

    $this->assertTrue($registry['theme_test_template_test'], 'Offset was returned correctly from the theme registry');
    $this->assertTrue($registry['theme_test_template_test_2'], 'Offset was returned correctly from the theme registry');
  }
}

/**
 * Tests for theme debug markup.
 */
class ThemeDebugMarkupTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Theme debug markup',
      'description' => 'Tests theme debug markup output.',
      'group' => 'Theme',
    );
  }

  function setUp() {
    parent::setUp('theme_test', 'node');
    theme_enable(array('test_theme'));
  }

  /**
   * Tests debug markup added to template output.
   */
  function testDebugOutput() {
    variable_set('theme_default', 'test_theme');
    // Enable the debug output.
    variable_set('theme_debug', TRUE);

    $registry = theme_get_registry();
    $extension = '.tpl.php';
    // Populate array of templates.
    $templates = drupal_find_theme_templates($registry, $extension, drupal_get_path('theme', 'test_theme'));
    $templates += drupal_find_theme_templates($registry, $extension, drupal_get_path('module', 'node'));

    // Create a node and test different features of the debug markup.
    $node = $this->drupalCreateNode();
    $this->drupalGet('node/' . $node->nid);
    $this->assertRaw('<!-- THEME DEBUG -->', 'Theme debug markup found in theme output when debug is enabled.');
    $this->assertRaw("CALL: theme('node')", 'Theme call information found.');
    $this->assertRaw('x node--1' . $extension . PHP_EOL . '   * node--page' . $extension . PHP_EOL . '   * node' . $extension, 'Suggested template files found in order and node ID specific template shown as current template.');
    $template_filename = $templates['node__1']['path'] . '/' . $templates['node__1']['template'] . $extension;
    $this->assertRaw("BEGIN OUTPUT from '$template_filename'", 'Full path to current template file found.');

    // Create another node and make sure the template suggestions shown in the
    // debug markup are correct.
    $node2 = $this->drupalCreateNode();
    $this->drupalGet('node/' . $node2->nid);
    $this->assertRaw('* node--2' . $extension . PHP_EOL . '   * node--page' . $extension . PHP_EOL . '   x node' . $extension, 'Suggested template files found in order and base template shown as current template.');

    // Create another node and make sure the template suggestions shown in the
    // debug markup are correct.
    $node3 = $this->drupalCreateNode();
    $build = array('#theme' => 'node__foo__bar');
    $build += node_view($node3);
    $output = drupal_render($build);
    $this->assertTrue(strpos($output, "CALL: theme('node__foo__bar')") !== FALSE, 'Theme call information found.');
    $this->assertTrue(strpos($output, '* node--foo--bar' . $extension . PHP_EOL . '   * node--foo' . $extension . PHP_EOL . '   * node--3' . $extension . PHP_EOL . '   * node--page' . $extension . PHP_EOL . '   x node' . $extension) !== FALSE, 'Suggested template files found in order and base template shown as current template.');

    // Disable theme debug.
    variable_set('theme_debug', FALSE);

    $this->drupalGet('node/' . $node->nid);
    $this->assertNoRaw('<!-- THEME DEBUG -->', 'Theme debug markup not found in theme output when debug is disabled.');
  }

}

/**
 * Tests module-provided theme engines.
 */
class ModuleProvidedThemeEngineTestCase extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Theme engine test',
      'description' => 'Tests module-provided theme engines.',
      'group' => 'Theme',
    );
  }

  function setUp() {
    parent::setUp('theme_test');
    theme_enable(array('test_theme', 'test_theme_nyan_cat'));
  }

  /**
   * Ensures that the module provided theme engine is found and used by core.
   */
  function testEngineIsFoundAndWorking() {
    variable_set('theme_default', 'test_theme_nyan_cat');
    variable_set('admin_theme', 'test_theme_nyan_cat');

    $this->drupalGet('theme-test/engine-info-test');
    $this->assertText('Miaou');
  }

}