drupal/modules/simpletest/tests/common.test

<?php
// $Id$

/**
 * Tests for the l() function.
 */
class CommonLUnitTest extends DrupalWebTestCase {

  public static function getInfo() {
    return array(
      'name' => t('Tests for the l() function'),
      'description' => t('Confirm that url() works correctly with various input.'),
      'group' => t('System'),
    );
  }

  /**
   * Confirm that invalid text given as $path is filtered.
   */
  function testLXSS() {
    $text = $this->randomName();
    $path = "<SCRIPT>alert('XSS')</SCRIPT>";
    $link = l($text, $path);
    $sanitized_path = check_url(url($path));
    $this->assertTrue(strpos($link, $sanitized_path) != FALSE, t('XSS attack @path was filtered', array('@path' => $path)));
  }
}

class CommonSizeTestCase extends DrupalWebTestCase {
  protected $exact_test_cases;
  protected $rounded_test_cases;

  public static function getInfo() {
    return array(
      'name' => t('Size parsing test'),
      'description' => t('Parse a predefined amount of bytes and compare the output with the expected value.'),
      'group' => t('System')
    );
  }

  function setUp() {
    $kb = DRUPAL_KILOBYTE;
    $this->exact_test_cases = array(
      '1 byte' => 1,
      '1 KB'   => $kb,
      '1 MB'   => $kb * $kb,
      '1 GB'   => $kb * $kb * $kb,
      '1 TB'   => $kb * $kb * $kb * $kb,
      '1 PB'   => $kb * $kb * $kb * $kb * $kb,
      '1 EB'   => $kb * $kb * $kb * $kb * $kb * $kb,
      '1 ZB'   => $kb * $kb * $kb * $kb * $kb * $kb * $kb,
      '1 YB'   => $kb * $kb * $kb * $kb * $kb * $kb * $kb * $kb,
    );
    $this->rounded_test_cases = array(
      '2 bytes' => 2,
      '1 MB' => ($kb * $kb) - 1, // rounded to 1 MB (not 1000 or 1024 kilobyte!)
      round(3623651 / ($this->exact_test_cases['1 MB']), 2) . ' MB' => 3623651, // megabytes
      round(67234178751368124 / ($this->exact_test_cases['1 PB']), 2) . ' PB' => 67234178751368124, // petabytes
      round(235346823821125814962843827 / ($this->exact_test_cases['1 YB']), 2) . ' YB' => 235346823821125814962843827, // yottabytes
    );
    parent::setUp();
  }

  /**
   * Check that format_size() returns the expected string.
   */
  function testCommonFormatSize() {
    foreach (array($this->exact_test_cases, $this->rounded_test_cases) as $test_cases) {
      foreach ($test_cases as $expected => $input) {
        $this->assertEqual(
          ($result = format_size($input, NULL)),
          $expected,
          $expected . ' == ' . $result . ' (' . $input . ' bytes)'
        );
      }
    }
  }

  /**
   * Check that parse_size() returns the proper byte sizes.
   */
  function testCommonParseSize() {
    foreach ($this->exact_test_cases as $string => $size) {
      $this->assertEqual(
        $parsed_size = parse_size($string),
        $size,
        $size . ' == ' . $parsed_size . ' (' . $string . ')'
      );
    }

    // Some custom parsing tests
    $string = '23476892 bytes';
    $this->assertEqual(
      ($parsed_size = parse_size($string)),
      $size = 23476892,
      $string . ' == ' . $parsed_size . ' bytes'
    );
    $string = '76MRandomStringThatShouldBeIgnoredByParseSize.'; // 76 MB
    $this->assertEqual(
      $parsed_size = parse_size($string),
      $size = 79691776,
      $string . ' == ' . $parsed_size . ' bytes'
    );
    $string = '76.24 Giggabyte'; // Misspeld text -> 76.24 GB
    $this->assertEqual(
      $parsed_size = parse_size($string),
      $size = 81862076662,
      $string . ' == ' . $parsed_size . ' bytes'
    );
  }

  /**
   * Cross-test parse_size() and format_size().
   */
  function testCommonParseSizeFormatSize() {
    foreach ($this->exact_test_cases as $size) {
      $this->assertEqual(
        $size,
        ($parsed_size = parse_size($string = format_size($size, NULL))),
        $size . ' == ' . $parsed_size . ' (' . $string . ')'
      );
    }
  }
}

/**
 * Test drupal_explode_tags() and drupal_implode_tags().
 */
class DrupalTagsHandlingTestCase extends DrupalWebTestCase {
  var $validTags = array(
    'Drupal' => 'Drupal',
    'Drupal with some spaces' => 'Drupal with some spaces',
    '"Legendary Drupal mascot of doom: ""Druplicon"""' => 'Legendary Drupal mascot of doom: "Druplicon"',
    '"Drupal, although it rhymes with sloopal, is as awesome as a troopal!"' => 'Drupal, although it rhymes with sloopal, is as awesome as a troopal!',
  );

  public static function getInfo() {
    return array(
      'name' => t('Drupal tags handling'),
      'description' => t("Performs tests on Drupal's handling of tags, both explosion and implosion tactics used."),
      'group' => t('System')
    );
  }

  /**
   * Explode a series of tags.
   */
  function testDrupalExplodeTags() {
    $string = implode(', ', array_keys($this->validTags));
    $tags = drupal_explode_tags($string);
    $this->assertTags($tags);
  }

  /**
   * Implode a series of tags.
   */
  function testDrupalImplodeTags() {
    $tags = array_values($this->validTags);
    // Let's explode and implode to our heart's content.
    for ($i = 0; $i < 10; $i++) {
      $string = drupal_implode_tags($tags);
      $tags = drupal_explode_tags($string);
    }
    $this->assertTags($tags);
  }

  /**
   * Helper function: asserts that the ending array of tags is what we wanted.
   */
  function assertTags($tags) {
    $original = $this->validTags;
    foreach ($tags as $tag) {
      $key = array_search($tag, $original);
      $this->assertTrue($key, t('Make sure tag %tag shows up in the final tags array (originally %original)', array('%tag' => $tag, '%original' => $key)));
      unset($original[$key]);
    }
    foreach ($original as $leftover) {
      $this->fail(t('Leftover tag %leftover was left over.', array('%leftover' => $leftover)));
    }
  }
}

/**
 * Test the Drupal CSS system.
 */
class CascadingStylesheetsTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Cascading stylesheets'),
      'description' => t('Tests adding various cascading stylesheets to the page.'),
      'group' => t('System'),
    );
  }

  function setUp() {
    parent::setUp('php');
    // Reset drupal_add_css() before each test.
    drupal_add_css(NULL, 'reset');
  }

  /**
   * Check default stylesheets as empty.
   */
  function testDefault() {
    $this->assertEqual(array(), drupal_add_css(), t('Default CSS is empty.'));
  }

  /**
   * Tests adding a file stylesheet.
   */
  function testAddFile() {
    $path = drupal_get_path('module', 'simpletest') . '/simpletest.css';
    $css = drupal_add_css($path);
    $this->assertEqual($css['all']['module'][$path], TRUE, t('Adding a CSS file caches it properly.'));
  }

  /**
   * Makes sure that reseting the CSS empties the cache.
   */
  function testReset() {
    drupal_add_css(NULL, 'reset');
    $this->assertEqual(array(), drupal_add_css(), t('Resetting the CSS empties the cache.'));
  }

  /**
   * Tests rendering the stylesheets.
   */
  function testRenderFile() {
    $css = drupal_get_path('module', 'simpletest') . '/simpletest.css';
    drupal_add_css($css);
    $this->assertTrue(strpos(drupal_get_css(), $css) > 0, t('Rendered CSS includes the added stylesheet.'));
  }

  /**
   * Tests rendering inline stylesheets with preprocessing on.
   */
  function testRenderInlinePreprocess() {
    $css = 'body { padding: 0px; }';
    $css_preprocessed = '<style type="text/css">' . drupal_load_stylesheet_content($css, TRUE) . '</style>';
    drupal_add_css($css, 'inline');
    $css = drupal_get_css();
    $this->assertEqual($css, $css_preprocessed, t('Rendering preprocessed inline CSS adds it to the page.'));
  }

  /**
   * Tests rendering inline stylesheets with preprocessing off.
   */
  function testRenderInlineNoPreprocess() {
    $css = 'body { padding: 0px; }';
    drupal_add_css($css, array('type' => 'inline', 'preprocess' => FALSE));
    $this->assertTrue(strpos(drupal_get_css(), $css) > 0, t('Rendering non-preprocessed inline CSS adds it to the page.'));
  }

  /**
   * Tests rendering inline stylesheets through a full page request.
   */
  function testRenderInlineFullPage() {
    $css = 'body { padding: 0px; }';
    $compressed_css = '<style type="text/css">' . drupal_load_stylesheet_content($css, TRUE) . '</style>';

    // Create a node, using the PHP filter that tests drupal_add_css().
    $settings = array(
      'type' => 'page',
      'format' => 3, // PHP filter.
      'body_format' => 3,
      'body' => t('This tests the inline CSS!') . "<?php drupal_add_css('$css', 'inline'); ?>",
      'promote' => 1,
    );
    $node = $this->drupalCreateNode($settings);

    // Fetch the page.
    $this->drupalGet('node/' . $node->nid);
    $this->assertRaw($compressed_css, t('Inline stylesheets appear in the full page rendering.'));
  }
}

/**
 * Test drupal_http_request().
 */
class DrupalHTTPRequestTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Drupal HTTP request'),
      'description' => t("Performs tests on Drupal's HTTP request mechanism."),
      'group' => t('System')
    );
  }

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

  function testDrupalHTTPRequest() {
    // Parse URL schema.
    $missing_scheme = drupal_http_request('example.com/path');
    $this->assertEqual($missing_scheme->error, 'missing schema', t('Returned with "missing schema" error.'));

    $unable_to_parse = drupal_http_request('http:///path');
    $this->assertEqual($unable_to_parse->error, 'unable to parse URL', t('Returned with "unable to parse URL" error.'));

    // Fetch page.
    $result = drupal_http_request(url('node', array('absolute' => TRUE)));
    $this->assertEqual($result->code, 200, t('Fetched page successfully.'));
    $this->drupalSetContent($result->data);
    $this->assertTitle(variable_get('site_name', 'Drupal'), t('Site title matches.'));

    // Test that code and status message is returned.
    $result = drupal_http_request(url('pagedoesnotexist', array('absolute' => TRUE)));
    $this->assertEqual($result->protocol, 'HTTP/1.0', t('Result protocol is set as HTTP/1.0'));
    $this->assertEqual($result->code, '404', t('Result code is 404'));
    $this->assertEqual($result->status_message, 'Not Found', t('Result status message is "Not Found"'));
  }

  function testDrupalHTTPRequestBasicAuth() {
    $username = $this->randomName();
    $password = $this->randomName();
    $url = url('system-test/auth', array('absolute' => TRUE));

    $auth = str_replace('http://', 'http://' . $username . ':' . $password .'@', $url);
    $result = drupal_http_request($auth);

    $this->drupalSetContent($result->data);
    $this->assertRaw($username, t('$_SERVER["PHP_AUTH_USER"] is passed correctly.'));
    $this->assertRaw($password, t('$_SERVER["PHP_AUTH_PW"] is passed correctly.'));
  }

  function testDrupalHTTPRequestRedirect() {
    $redirect_301 = drupal_http_request(url('system-test/redirect/301', array('absolute' => TRUE)), array('max_redirects' => 1));
    $this->assertEqual($redirect_301->redirect_code, 301, t('drupal_http_request follows the 301 redirect.'));

    $redirect_301 = drupal_http_request(url('system-test/redirect/301', array('absolute' => TRUE)), array('max_redirects' => 0));
    $this->assertFalse(isset($redirect_301->redirect_code), t('drupal_http_request does not follow 301 redirect if max_redirects = 0.'));

    $redirect_invalid = drupal_http_request(url('system-test/redirect-noscheme', array('absolute' => TRUE)), array('max_redirects' => 1));
    $this->assertEqual($redirect_invalid->error, 'missing schema', t('301 redirect to invalid URL returned with error "!error".', array('!error' => $redirect_invalid->error)));

    $redirect_invalid = drupal_http_request(url('system-test/redirect-noparse', array('absolute' => TRUE)), array('max_redirects' => 1));
    $this->assertEqual($redirect_invalid->error, 'unable to parse URL', t('301 redirect to invalid URL returned with error "!error".', array('!error' => $redirect_invalid->error)));

    $redirect_invalid = drupal_http_request(url('system-test/redirect-invalid-scheme', array('absolute' => TRUE)), array('max_redirects' => 1));
    $this->assertEqual($redirect_invalid->error, 'invalid schema ftp', t('301 redirect to invalid URL returned with error "!error".', array('!error' => $redirect_invalid->error)));

    $redirect_302 = drupal_http_request(url('system-test/redirect/302', array('absolute' => TRUE)), array('max_redirects' => 1));
    $this->assertEqual($redirect_302->redirect_code, 302, t('drupal_http_request follows the 302 redirect.'));

    $redirect_302 = drupal_http_request(url('system-test/redirect/302', array('absolute' => TRUE)), array('max_redirects' => 0));
    $this->assertFalse(isset($redirect_302->redirect_code), t('drupal_http_request does not follow 302 redirect if $retry = 0.'));

    $redirect_307 = drupal_http_request(url('system-test/redirect/307', array('absolute' => TRUE)), array('max_redirects' => 1));
    $this->assertEqual($redirect_307->redirect_code, 307, t('drupal_http_request follows the 307 redirect.'));

    $redirect_307 = drupal_http_request(url('system-test/redirect/307', array('absolute' => TRUE)), array('max_redirects' => 0));
    $this->assertFalse(isset($redirect_307->redirect_code), t('drupal_http_request does not follow 307 redirect if max_redirects = 0.'));
  }

  function testDrupalGetDestination() {
    $query = $this->randomName(10);
    $url = url('system-test/destination', array('absolute' => TRUE, 'query' => $query));
    $this->drupalGet($url);
    $this->assertText($query, t('The query passed to the page is correctly represented by drupal_get_detination().'));
  }
}

/**
 * Testing drupal_set_content and drupal_get_content.
 */
class DrupalSetContentTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Drupal set/get content'),
      'description' => t('Performs tests on setting and retrieiving content from theme regions.'),
      'group' => t('System')
    );
  }


  /**
   * Test setting and retrieving content for theme regions.
   */
  function testRegions() {
    global $theme_key;

    $block_regions = array_keys(system_region_list($theme_key));
    $delimiter = $this->randomName(32);
    $values = array();
    // Set some random content for each region available.
    foreach ($block_regions as $region) {
      $first_chunk = $this->randomName(32);
      drupal_set_content($region, $first_chunk);
      $second_chunk = $this->randomName(32);
      drupal_set_content($region, $second_chunk);
      // Store the expected result for a drupal_get_content call for this region.
      $values[$region] = $first_chunk . $delimiter . $second_chunk;
    }

    // Ensure drupal_get_content returns expected results when fetching all regions.
    $content = drupal_get_content(NULL, $delimiter);
    foreach ($content as $region => $region_content) {
      $this->assertEqual($region_content, $values[$region], t('@region region text verified when fetching all regions', array('@region' => $region)));
    }

    // Ensure drupal_get_content returns expected results when fetching a single region.
    foreach ($block_regions as $region) {
      $region_content = drupal_get_content($region, $delimiter);
      $this->assertEqual($region_content, $values[$region], t('@region region text verified when fetching single region.', array('@region' => $region)));
    }
  }
}

/**
 * Tests for the JavaScript system.
 */
class JavaScriptTestCase extends DrupalWebTestCase {
  /**
   * Store configured value for JavaScript preprocessing.
   */
  var $preprocess_js = NULL;

  public static function getInfo() {
    return array(
      'name' => t('JavaScript'),
      'description' => t('Tests the JavaScript system.'),
      'group' => t('System')
    );
  }

  function setUp() {
    // Enable Locale and SimpleTest in the test environment.
    parent::setUp('locale', 'simpletest');

    // Disable preprocessing
    $this->preprocess_js = variable_get('preprocess_js', 0);
    variable_set('preprocess_js', 0);

    // Reset drupal_add_js() before each test.
    drupal_add_js(NULL, 'reset');
  }

  function tearDown() {
    // Restore configured value for JavaScript preprocessing.
    variable_set('preprocess_js', $this->preprocess_js);
    parent::tearDown();
  }

  /**
   * Test default JavaScript is empty.
   */
  function testDefault() {
    $this->assertEqual(array(), drupal_add_js(), t('Default JavaScript is empty.'));
  }

  /**
   * Test adding a JavaScript file.
   */
  function testAddFile() {
    $javascript = drupal_add_js('misc/collapse.js');
    $this->assertTrue(array_key_exists('misc/jquery.js', $javascript), t('jQuery is added when a file is added.'));
    $this->assertTrue(array_key_exists('misc/drupal.js', $javascript), t('Drupal.js is added when file is added.'));
    $this->assertTrue(array_key_exists('misc/collapse.js', $javascript), t('JavaScript files are correctly added.'));
    $this->assertEqual(base_path(), $javascript['settings']['data'][0]['basePath'], t('Base path JavaScript setting is correctly set.'));
  }

  /**
   * Test adding settings.
   */
  function testAddSetting() {
    $javascript = drupal_add_js(array('drupal' => 'rocks', 'dries' => 280342800), 'setting');
    $this->assertEqual(280342800, $javascript['settings']['data'][1]['dries'], t('JavaScript setting is set correctly.'));
    $this->assertEqual('rocks', $javascript['settings']['data'][1]['drupal'], t('The other JavaScript setting is set correctly.'));
  }

  /**
   * Test drupal_get_js() for JavaScript settings.
   */
  function testHeaderSetting() {
    drupal_add_js(array('testSetting' => 'testValue'), 'setting');
    $javascript = drupal_get_js('header');
    $this->assertTrue(strpos($javascript, 'basePath') > 0, t('Rendered JavaScript header returns basePath setting.'));
    $this->assertTrue(strpos($javascript, 'testSetting') > 0, t('Rendered JavaScript header returns custom setting.'));
    $this->assertTrue(strpos($javascript, 'misc/jquery.js') > 0, t('Rendered JavaScript header includes jQuery.'));
  }

  /**
   * Test to see if resetting the JavaScript empties the cache.
   */
  function testReset() {
    drupal_add_js('misc/collapse.js');
    drupal_add_js(NULL, 'reset');
    $this->assertEqual(array(), drupal_add_js(), t('Resetting the JavaScript correctly empties the cache.'));
  }

  /**
   * Test adding inline scripts.
   */
  function testAddInline() {
    $inline = 'jQuery(function(){});';
    $javascript = drupal_add_js($inline, array('type' => 'inline', 'scope' => 'footer'));
    $this->assertTrue(array_key_exists('misc/jquery.js', $javascript), t('jQuery is added when inline scripts are added.'));
    $data = end($javascript);
    $this->assertEqual($inline, $data['data'], t('Inline JavaScript is correctly added to the footer.'));
  }

  /**
   * Test rendering an external JavaScript file.
   */
  function testRenderExternal() {
    $external = 'http://example.com/example.js';
    drupal_add_js($external, 'external');
    $javascript = drupal_get_js();
    // Local files have a base_path() prefix, external files should not.
    $this->assertTrue(strpos($javascript, 'src="' . $external) > 0, t('Rendering an external JavaScript file.'));
  }

  /**
   * Test drupal_get_js() with a footer scope.
   */
  function testFooterHTML() {
    $inline = 'jQuery(function(){});';
    drupal_add_js($inline, array('type' => 'inline', 'scope' => 'footer'));
    $javascript = drupal_get_js('footer');
    $this->assertTrue(strpos($javascript, $inline) > 0, t('Rendered JavaScript footer returns the inline code.'));
  }

  /**
   * Test drupal_add_js() sets preproccess to false when cache is set to false.
   */
  function testNoCache() {
    $javascript = drupal_add_js('misc/collapse.js', array('cache' => FALSE));
    $this->assertFalse($javascript['misc/collapse.js']['preprocess'], t('Setting cache to FALSE sets proprocess to FALSE when adding JavaScript.'));
  }

  /**
   * Test adding a JavaScript file with a different weight.
   */
  function testDifferentWeight() {
    $javascript = drupal_add_js('misc/collapse.js', array('weight' => JS_THEME));
    $this->assertEqual($javascript['misc/collapse.js']['weight'], JS_THEME, t('Adding a JavaScript file with a different weight caches the given weight.'));
  }

  /**
   * Test rendering the JavaScript with a file's weight above jQuery's.
   */
  function testRenderDifferentWeight() {
    drupal_add_js('misc/collapse.js', array('weight' => JS_LIBRARY - 10));
    $javascript = drupal_get_js();
    $this->assertTrue(strpos($javascript, 'misc/collapse.js') < strpos($javascript, 'misc/jquery.js'), t('Rendering a JavaScript file above jQuery.'));
  }

  /**
   * Test altering a JavaScript's weight via hook_js_alter().
   *
   * @see simpletest_js_alter()
   */
  function testAlter() {
    // Add both tableselect.js and simpletest.js, with a larger weight on SimpleTest.
    drupal_add_js('misc/tableselect.js');
    drupal_add_js(drupal_get_path('module', 'simpletest') . '/simpletest.js', array('weight' => JS_THEME));

    // Render the JavaScript, testing if simpletest.js was altered to be before
    // tableselect.js. See simpletest_js_alter() to see where this alteration
    // takes place.
    $javascript = drupal_get_js();
    $this->assertTrue(strpos($javascript, 'simpletest.js') < strpos($javascript, 'misc/tableselect.js'), t('Altering JavaScript weight through the alter hook.'));
  }
}

/**
 * Tests for drupal_render().
 */
class DrupalRenderUnitTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Drupal render'),
      'description' => t('Performs unit tests on drupal_render().'),
      'group' => t('System'),
    );
  }

  /**
   * Test sorting by weight.
   */
  function testDrupalRenderSorting() {
    $first = $this->randomName();
    $second = $this->randomName();
    // Build an array with '#weight' set for each element.
    $elements = array(
      'second' => array(
        '#weight' => 10,
        '#markup' => $second,
      ),
      'first' => array(
        '#weight' => 0,
        '#markup' => $first,
      ),
    );
    $output = drupal_render($elements);

    // The lowest weight element should appear last in $output.
    $this->assertTrue(strpos($output, $second) > strpos($output, $first), t('Elements were sorted correctly by weight.'));

    // Confirm that the $elements array has '#sorted' set to TRUE.
    $this->assertTrue($elements['#sorted'], t("'#sorted' => TRUE was added to the array"));

    // Pass $elements through element_children() and ensure it remains
    // sorted in the correct order. drupal_render() will return an empty string
    // if used on the same array in the same request.
    $children = element_children($elements);
    $this->assertTrue(array_shift($children) == 'first', t('Child found in the correct order.'));
    $this->assertTrue(array_shift($children) == 'second', t('Child found in the correct order.'));


    // The same array structure again, but with #sorted set to TRUE.
    $elements = array(
      'second' => array(
        '#weight' => 10,
        '#markup' => $second,
      ),
      'first' => array(
        '#weight' => 0,
        '#markup' => $first,
      ),
      '#sorted' => TRUE,
    );
    $output = drupal_render($elements);

    // The elements should appear in output in the same order as the array.
    $this->assertTrue(strpos($output, $second) < strpos($output, $first), t('Elements were not sorted.'));
  }
}


/**
 * Tests Drupal error and exception handlers.
 */
class DrupalErrorHandlerUnitTest extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Drupal error handlers'),
      'description' => t('Performs tests on the Drupal error and exception handler.'),
      'group' => t('System'),
    );
  }

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

  /**
   * Test the error handler.
   */
  function testErrorHandler() {
    $error_notice = array(
      '%type' => 'Notice',
      '%message' => 'Undefined variable: bananas',
      '%function' => 'system_test_generate_warnings()',
      '%line' => 194,
      '%file' => realpath('modules/simpletest/tests/system_test.module'),
    );
    $error_warning = array(
      '%type' => 'Warning',
      '%message' => 'Division by zero',
      '%function' => 'system_test_generate_warnings()',
      '%line' => 196,
      '%file' => realpath('modules/simpletest/tests/system_test.module'),
    );
    $error_user_notice = array(
      '%type' => 'User notice',
      '%message' => 'Drupal is awesome',
      '%function' => 'system_test_generate_warnings()',
      '%line' => 198,
      '%file' => realpath('modules/simpletest/tests/system_test.module'),
    );

    // Set error reporting to collect notices.
    variable_set('error_level', 2);
    $this->drupalGet('system-test/generate-warnings');
    $this->assertErrorMessage($error_notice);
    $this->assertErrorMessage($error_warning);
    $this->assertErrorMessage($error_user_notice);

    // Set error reporting to not collect notices.
    variable_set('error_level', 1);
    $this->drupalGet('system-test/generate-warnings');
    $this->assertNoErrorMessage($error_notice);
    $this->assertErrorMessage($error_warning);
    $this->assertErrorMessage($error_user_notice);

    // Set error reporting to not show any errors.
    variable_set('error_level', 0);
    $this->drupalGet('system-test/generate-warnings');
    $this->assertNoErrorMessage($error_notice);
    $this->assertNoErrorMessage($error_warning);
    $this->assertNoErrorMessage($error_user_notice);
  }

  /**
   * Test the exception handler.
   */
  function testExceptionHandler() {
    $error_exception = array(
      '%type' => 'Exception',
      '%message' => 'Drupal is awesome',
      '%function' => 'system_test_trigger_exception()',
      '%line' => 207,
      '%file' => realpath('modules/simpletest/tests/system_test.module'),
    );
    $error_pdo_exception = array(
      '%type' => 'PDOException',
      '%message' => 'SQLSTATE',
      '%function' => 'system_test_trigger_pdo_exception()',
      '%line' => 215,
      '%file' => realpath('modules/simpletest/tests/system_test.module'),
    );

    $this->drupalGet('system-test/trigger-exception');
    $this->assertErrorMessage($error_exception);

    $this->drupalGet('system-test/trigger-pdo-exception');
    // We cannot use assertErrorMessage() since the extact error reported
    // varies from database to database. Check for the error keyword 'SQLSTATE'.
    $this->assertText($error_pdo_exception['%type'], t('Found %type in error page.', $error_pdo_exception));
    $this->assertText($error_pdo_exception['%message'], t('Found %message in error page.', $error_pdo_exception));
    $error_details = t('in %function (line %line of %file)', $error_pdo_exception);
    $this->assertRaw($error_details, t("Found '!message' in error page.", array('!message' => $error_details)));
  }

  /**
   * Helper function: assert that the error message is found.
   */
  function assertErrorMessage(array $error) {
    $message = t('%type: %message in %function (line %line of %file).', $error);
    $this->assertRaw($message, t('Error !message found.', array('!message' => $message)));
  }

  /**
   * Helper function: assert that the error message is not found.
   */
  function assertNoErrorMessage(array $error) {
    $message = t('%type: %message in %function (line %line of %file).', $error);
    $this->assertNoRaw($message, t('Error !message not found.', array('!message' => $message)));
  }
}

/**
 * Test for valid_url().
 */
class ValidUrlTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Valid Url'),
      'description' => t("Performs tests on Drupal's valid url function."),
      'group' => t('System')
    );
  }

  /**
   * Test valid absolute urls.
   */
  function testValidAbsolute() {
    $url_schemes = array('http', 'https', 'ftp');
    $valid_absolute_urls = array(
      'example.com',
      'www.example.com',
      'ex-ample.com',
      '3xampl3.com',
      'example.com/paren(the)sis',
      'example.com/index.html#pagetop',
      'example.com:8080',
      'subdomain.example.com',
      'example.com/index.php?q=node',
      'example.com/index.php?q=node&param=false',
      'user@www.example.com',
      'user:pass@www.example.com:8080/login.php?do=login&style=%23#pagetop',
      '127.0.0.1',
      'example.org?',
      'john%20doe:secret:foo@example.org/',
      'example.org/~,$\'*;',
      'caf%C3%A9.example.org',
      '[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:80/index.html',
    );

    foreach ($url_schemes as $scheme) {
      foreach ($valid_absolute_urls as $url) {
        $test_url = $scheme . '://' . $url;
        $valid_url = valid_url($test_url, TRUE);
        $this->assertTrue($valid_url, t('@url is a valid url.', array('@url' => $test_url)));
      }
    }
  }

  /**
   * Test invalid absolute urls.
   */
  function testInvalidAbsolute() {
    $url_schemes = array('http', 'https', 'ftp');
    $invalid_ablosule_urls = array(
      '',
      'ex!ample.com',
      'ex%ample.com',
    );

    foreach ($url_schemes as $scheme) {
      foreach ($invalid_ablosule_urls as $url) {
        $test_url = $scheme . '://' . $url;
        $valid_url = valid_url($test_url, TRUE);
        $this->assertFalse($valid_url, t('@url is NOT a valid url.', array('@url' => $test_url)));
      }
    }
  }

  /**
   * Test valid relative urls.
   */
  function testValidRelative() {
    $valid_relative_urls = array(
      'paren(the)sis',
      'index.html#pagetop',
      'index.php?q=node',
      'index.php?q=node&param=false',
      'login.php?do=login&style=%23#pagetop',
    );

    foreach (array('', '/') as $front) {
      foreach ($valid_relative_urls as $url) {
        $test_url = $front . $url;
        $valid_url = valid_url($test_url);
        $this->assertTrue($valid_url,t('@url is a valid url.', array('@url' => $test_url)));
      }
    }
  }

  /**
   * Test invalid relative urls.
   */
  function testInvalidRelative() {
    $invalid_relative_urls = array(
      'ex^mple',
      'example<>',
      'ex%ample',
    );

    foreach (array('', '/') as $front) {
      foreach ($invalid_relative_urls as $url) {
        $test_url = $front . $url;
        $valid_url = valid_url($test_url);
        $this->assertFALSE($valid_url,t('@url is NOT a valid url.', array('@url' => $test_url)));
      }
    }
  }
}

/**
 * Tests for CRUD API functions.
 */
class DrupalDataApiTest extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Data API functions'),
      'description' => t('Tests the performance of CRUD APIs.'),
      'group' => t('System'),
    );
  }

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

  /**
   * Test the drupal_write_record() API function.
   */
  function testDrupalWriteRecord() {
    // Insert an object record for a table with a single-field primary key.
    $vocabulary = new StdClass();
    $vocabulary->name = 'test';
    $insert_result = drupal_write_record('taxonomy_vocabulary', $vocabulary);
    $this->assertTrue($insert_result == SAVED_NEW, t('Correct value returned when a record is inserted with drupal_write_record() for a table with a single-field primary key.'));
    $this->assertTrue(isset($vocabulary->vid), t('Primary key is set on record created with drupal_write_record().'));

    // Update the initial record after changing a property.
    $vocabulary->name = 'testing';
    $update_result = drupal_write_record('taxonomy_vocabulary', $vocabulary, array('vid'));
    $this->assertTrue($update_result == SAVED_UPDATED, t('Correct value returned when a record updated with drupal_write_record() for table with single-field primary key.'));

    // Insert an object record for a table with a multi-field primary key.
    $vocabulary_node_type = new StdClass();
    $vocabulary_node_type->vid = $vocabulary->vid;
    $vocabulary_node_type->type = 'page';
    $insert_result = drupal_write_record('taxonomy_vocabulary_node_type', $vocabulary_node_type);
    $this->assertTrue($insert_result == SAVED_NEW, t('Correct value returned when a record is inserted with drupal_write_record() for a table with a multi-field primary key.'));

    // Update the record.
    $update_result = drupal_write_record('taxonomy_vocabulary_node_type', $vocabulary_node_type, array('vid', 'type'));
    $this->assertTrue($update_result == SAVED_UPDATED, t('Correct value returned when a record is updated with drupal_write_record() for a table with a multi-field primary key.'));
  }

}

/**
 * Tests Simpletest error and exception collecter.
 */
class DrupalErrorCollectionUnitTest extends DrupalWebTestCase {

  /**
   * Errors triggered during the test.
   *
   * Errors are intercepted by the overriden implementation
   * of DrupalWebTestCase::error below.
   *
   * @var Array
   */
  protected $collectedErrors = array();

  public static function getInfo() {
    return array(
      'name' => t('SimpleTest error collecter'),
      'description' => t('Performs tests on the Simpletest error and exception collecter.'),
      'group' => t('SimpleTest'),
    );
  }

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

  /**
   * Test that simpletest collects errors from the tested site.
   */
  function testErrorCollect() {
    $this->collectedErrors = array();
    $this->drupalGet('system-test/generate-warnings-with-report');

    $this->assertEqual(count($this->collectedErrors), 3, t('Three errors were collected'));

    if (count($this->collectedErrors) == 3) {
      $this->assertError($this->collectedErrors[0], 'Notice', 'system_test_generate_warnings()', 'system_test.module', 'Undefined variable: bananas');
      $this->assertError($this->collectedErrors[1], 'Warning', 'system_test_generate_warnings()', 'system_test.module', 'Division by zero');
      $this->assertError($this->collectedErrors[2], 'User notice', 'system_test_generate_warnings()', 'system_test.module', 'Drupal is awesome');
    }
    else {
      // Give back the errors to the log report.
      foreach ($this->collectedErrors as $error) {
        parent::error($error['message'], $error['group'], $error['caller']);
      }
    }
  }

  protected function error($message = '', $group = 'Other', array $caller = NULL) {
    // This function overiddes DrupalWebTestCase::error(). We collect an error...
    $this->collectedErrors[] = array(
      'message' => $message,
      'group' => $group,
      'caller' => $caller
    );
    // ... and ignore it.
  }

  /**
   * Assert that a collected error matches what we are expecting.
   */
  function assertError($error, $group, $function, $file, $message = NULL) {
    $this->assertEqual($error['group'], $group, t("Group was %group", array('%group' => $group)));
    $this->assertEqual($error['caller']['function'], $function, t("Function was %function", array('%function' => $function)));
    $this->assertEqual(basename($error['caller']['file']), $file, t("File was %file", array('%file' => $file)));
    if (isset($message)) {
      $this->assertEqual($error['message'], $message, t("Message was %message", array('%message' => $message)));
    }
  }
}