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class BotchaTestCase in BOTCHA Spam Prevention 6

Same name and namespace in other branches
  1. 6.2 botcha.test \BotchaTestCase
  2. 6.3 tests/botcha.simpletest.test \BotchaTestCase
  3. 7 botcha.test \BotchaTestCase
  4. 7.2 botcha.test \BotchaTestCase
  5. 7.3 tests/botcha.simpletest.test \BotchaTestCase

Hierarchy

Expanded class hierarchy of BotchaTestCase

File

./botcha.test, line 222
Tests for BOTCHA module.

View source 
class BotchaTestCase extends BotchaBaseWebTestCase {
  public static function getInfo() {
    return array(
      'name' => t('General BOTCHA functionality'),
      'description' => t('Testing of the basic BOTCHA functionality.'),
      'group' => t('BOTCHA'),
    );
  }

  /**
   * Testing the protection of the user log in form.
   */
  function testBotchaOnLoginForm() {

    // Create user and test log in without BOTCHA.
    $user = $this
      ->drupalCreateUser();
    $this
      ->drupalLogin($user);

    // Log out again.
    $this
      ->drupalLogout();

    // Set a BOTCHA on login form
    botcha_set_form_id_setting('user_login', 'default');

    // Check if there is a BOTCHA on the login form (look for the title).
    $this
      ->drupalGet('user');
    $this
      ->assertBotchaPresence(TRUE);

    // Try to log in, which should fail (due to JS required for 'default' BOTCHA recipe is not present in simpletest browser).
    $edit = array(
      'name' => $user->name,
      'pass' => $user->pass_raw,
    );
    $this
      ->drupalPost('user', $edit, t('Log in'));

    // Check for error message.
    $this
      ->assertText(t(BOTCHA_WRONG_RESPONSE_ERROR_MESSAGE), 'BOTCHA should block user login form', 'BOTCHA');

    // And make sure that user is not logged in: check for name and password fields on ?q=user
    $this
      ->drupalGet('user');
    $this
      ->assertField('name', t('Username field found.'), 'BOTCHA');
    $this
      ->assertField('pass', t('Password field found.'), 'BOTCHA');
  }

  /**
   * Assert function for testing if comment posting works as it should.
   *
   * Creates node with comment writing enabled, tries to post comment
   * with given BOTCHA response (caller should enable the desired
   * challenge on page node comment forms) and checks if the result is as expected.
   *
   * @param $node existing node to post comments to (if NULL, will be created)
   * @param $should_pass boolean describing if the posting should pass or should be blocked
   * @param $message message to prefix to nested asserts
   * @param $button name of button to click (t('Save') by default)
   */
  protected function assertCommentPosting($node, $should_pass, $message, $button = '') {

    // Make sure comments on pages can be saved directely without preview.
    variable_set('comment_preview_page', DRUPAL_OPTIONAL);
    if (empty($node)) {

      // Create a node with comments enabled.
      $node = $this
        ->createNodeWithCommentsEnabled();
    }
    if (empty($button)) {
      $button = t('Save');
    }

    // Check if there is a BOTCHA on the comment form.
    $this
      ->drupalGet('comment/reply/' . $node->nid);
    $this
      ->assertBotchaPresence(TRUE);

    // Post comment on node.
    $edit = $this
      ->setCommentFormValues();
    if (!$should_pass) {

      // Screw up fields (like a bot would do)
      $edit['botcha_response'] = 'xx';
    }
    $comment_subject = $edit['subject'];
    $comment_body = $edit['comment'];
    $this
      ->drupalPost('comment/reply/' . $node->nid, $edit, $button);
    if ($should_pass) {

      // There should be no error message.
      $this
        ->assertBotchaResponseAccepted();

      // Get node page and check that comment shows up.
      $this
        ->drupalGet('node/' . $node->nid);
      $this
        ->assertText($comment_subject, $message . ' Comment should show up on node page.', 'BOTCHA');
      $this
        ->assertText($comment_body, $message . ' Comment should show up on node page.', 'BOTCHA');
    }
    else {

      // Check for error message.
      $this
        ->assertText(t(BOTCHA_WRONG_RESPONSE_ERROR_MESSAGE), $message . ' Comment submission should be blocked.', 'BOTCHA');

      // Check that there is still BOTCHA after failed submit.
      $this
        ->assertBotchaPresence(TRUE);

      // Get node page and check that comment is not present.
      $this
        ->drupalGet('node/' . $node->nid);
      $this
        ->assertNoText($comment_subject, $message . ' Comment should not show up on node page.', 'BOTCHA');
      $this
        ->assertNoText($comment_body, $message . ' Comment should not show up on node page.', 'BOTCHA');
    }
    return $node;
  }

  /**
   * Testing the case sensistive/insensitive validation.
   */
  function testBotchaValidation() {

    // Set Test BOTCHA on comment form
    botcha_set_form_id_setting(self::COMMENT_FORM_ID, 'test');

    // Log in as normal user.
    $this
      ->drupalLogin($this->normal_user);
    $this
      ->assertCommentPosting(NULL, TRUE, 'Validation of right fields touched.');
    $this
      ->assertCommentPosting(NULL, FALSE, 'Validation of wrong fields touched.');
  }

  /**
   * Test if BOTCHA is applied when previewing comments:
   * comment preview should have BOTCHA again.
   *
   * \see testBotchaAfterNodePreview()
   */
  function testBotchaAfterCommentPreview() {

    // Set Test BOTCHA on comment form.
    botcha_set_form_id_setting(self::COMMENT_FORM_ID, 'test');

    // Log in as normal user.
    $this
      ->drupalLogin($this->normal_user);

    // Create a node with comments enabled.
    $node = $this
      ->createNodeWithCommentsEnabled();

    // Check if there is a BOTCHA on the comment form (look for the title).
    $this
      ->drupalGet('comment/reply/' . $node->nid);
    $this
      ->assertBotchaPresence(TRUE);

    // Preview comment with correct BOTCHA.
    $edit = $this
      ->setCommentFormValues();
    $this
      ->drupalPost('comment/reply/' . $node->nid, $edit, t('Preview'));

    // Check that there is still BOTCHA after preview.
    $this
      ->assertBotchaPresence(TRUE);
  }

  /**
   * Test if BOTCHA is applied when previewing nodes:
   * node preview should have BOTCHA again.
   * The preview functionality of comments and nodes works slightly different under the hood.
   * BOTCHA module should be able to handle both.
   *
   * \see testBotchaAfterCommentPreview()
   */
  function testBotchaAfterNodePreview() {

    // Set Test BOTCHA on page form.
    botcha_set_form_id_setting('page_node_form', 'test');

    // Log in as normal user.
    $this
      ->drupalLogin($this->normal_user);

    // Check if there is a BOTCHA on the node form (look for the title).
    $this
      ->drupalGet('node/add/page');
    $this
      ->assertBotchaPresence(TRUE);

    // Page settings to post, with correct BOTCHA answer.
    $edit = $this
      ->setNodeFormValues();

    // Preview the node
    $this
      ->drupalPost('node/add/page', $edit, t('Preview'));

    // Check that there is still BOTCHA after preview.
    $this
      ->assertBotchaPresence(TRUE);
  }

  /**
   * BOTCHA should also be put on admin pages if visitor
   * has no access
   */
  function testBotchaOnLoginBlockOnAdminPages() {

    // Set a BOTCHA on login block form
    botcha_set_form_id_setting('user_login_block', 'default');

    // Check if there is a BOTCHA on home page.
    $this
      ->drupalGet('node');
    $this
      ->assertBotchaPresence(TRUE);

    // Check there is a BOTCHA on "forbidden" admin pages
    $this
      ->drupalGet('admin');
    $this
      ->assertBotchaPresence(TRUE);
  }

  /**
   * Test if BOTCHA is applied correctly when failing first and then resubmitting comments:
   * comment form should have BOTCHA again and pass correct submission.
   * (We use to fail BOTCHA as it is impossible to fail comment form on its own)
   *
   * \see testBotchaAfterNodePreview()
   */
  function testBotchaResubmit() {

    // Set Test BOTCHA on comment form.
    botcha_set_form_id_setting(self::COMMENT_FORM_ID, 'test');

    // Create a node with comments enabled.
    $node = $this
      ->createNodeWithCommentsEnabled();

    // Log in as normal user.
    $this
      ->drupalLogin($this->normal_user);

    // Make sure comments on pages can be saved directely without preview.
    variable_set('comment_preview_page', DRUPAL_OPTIONAL);

    // Check if there is a BOTCHA on the comment form.
    $this
      ->drupalGet('comment/reply/' . $node->nid);
    $this
      ->assertBotchaPresence(TRUE);

    // Post comment on node.
    $edit = $this
      ->setCommentFormValues();

    // Screw up fields (like a bot would do)
    $edit['botcha_response'] = 'xx';
    $comment_subject = $edit['subject'];
    $comment_body = $edit['comment'];
    $this
      ->drupalPost('comment/reply/' . $node->nid, $edit, t('Save'));

    // Check for error message.
    $this
      ->assertText(t(BOTCHA_WRONG_RESPONSE_ERROR_MESSAGE), 'Comment submission should be blocked.', 'BOTCHA');

    // Check that there is still BOTCHA after failed submit.
    $this
      ->assertBotchaPresence(TRUE);

    // Copy all values from the form into new one.
    $edit = $this
      ->getCommentFormValuesFromForm();

    // Get node page and check that comment is not present.
    $this
      ->drupalGet('node/' . $node->nid);
    $this
      ->assertNoText($comment_subject, 'Comment should not show up on node page.', 'BOTCHA');
    $this
      ->assertNoText($comment_body, 'Comment should not show up on node page.', 'BOTCHA');
    $comment_subject = $edit['subject'];
    $comment_body = $edit['comment'];

    // Save comment again with correct BOTCHA.
    $this
      ->drupalPost('comment/reply/' . $node->nid, $edit, t('Save'));

    // There should be no error message.
    $this
      ->assertBotchaResponseAccepted();

    // Get node page and check that comment shows up.
    $this
      ->drupalGet('node/' . $node->nid);
    $this
      ->assertText($comment_subject, ' Comment should show up on node page.', 'BOTCHA');
    $this
      ->assertText($comment_body, ' Comment should show up on node page.', 'BOTCHA');
  }

}

Members

Namesort descending Modifiers Type Description Overrides
BotchaBaseWebTestCase::$admin_user protected property User with various administrative permissions.
BotchaBaseWebTestCase::$normal_user protected property Normal visitor with limited permissions
BotchaBaseWebTestCase::allowCommentPostingForAnonymousVisitors protected function Helper function to allow comment posting for anonymous users.
BotchaBaseWebTestCase::assertBotchaPresence protected function Assert that there is a BOTCHA on the form or not.
BotchaBaseWebTestCase::assertBotchaResponseAccepted protected function Assert that the response is accepted: no "unknown CSID" message, no "CSID reuse attack detection" message, no "wrong answer" message.
BotchaBaseWebTestCase::BOTCHA_ADMIN_PATH constant Drupal path of the (general) BOTCHA admin page
BotchaBaseWebTestCase::COMMENT_FORM_ID constant Form ID of comment form on standard (page) node
BotchaBaseWebTestCase::createNodeWithCommentsEnabled protected function Helper function to create a node with comments enabled.
BotchaBaseWebTestCase::getCommentFormValuesFromForm protected function Helper function to get form values array from comment form
BotchaBaseWebTestCase::getFormBuildIdFromForm protected function Get the form_build_id from the current form in the browser.
BotchaBaseWebTestCase::setCommentFormValues protected function Helper function to generate a default form values array for comment forms
BotchaBaseWebTestCase::setNodeFormValues protected function Helper function to generate a default form values array for node forms
BotchaBaseWebTestCase::setUp function Generates a random database prefix, runs the install scripts on the prefixed database and enable the specified modules. After installation many caches are flushed and the internal browser is setup so that the page requests will run on the new prefix.… Overrides DrupalWebTestCase::setUp
BotchaTestCase::assertCommentPosting protected function Assert function for testing if comment posting works as it should.
BotchaTestCase::getInfo public static function
BotchaTestCase::testBotchaAfterCommentPreview function Test if BOTCHA is applied when previewing comments: comment preview should have BOTCHA again.
BotchaTestCase::testBotchaAfterNodePreview function Test if BOTCHA is applied when previewing nodes: node preview should have BOTCHA again. The preview functionality of comments and nodes works slightly different under the hood. BOTCHA module should be able to handle both.
BotchaTestCase::testBotchaOnLoginBlockOnAdminPages function BOTCHA should also be put on admin pages if visitor has no access
BotchaTestCase::testBotchaOnLoginForm function Testing the protection of the user log in form.
BotchaTestCase::testBotchaResubmit function Test if BOTCHA is applied correctly when failing first and then resubmitting comments: comment form should have BOTCHA again and pass correct submission. (We use to fail BOTCHA as it is impossible to fail comment form on its own)
BotchaTestCase::testBotchaValidation function Testing the case sensistive/insensitive validation.
DrupalTestCase::$assertions protected property Assertions thrown in that test case.
DrupalTestCase::$databasePrefix protected property The database prefix of this test run.
DrupalTestCase::$originalFileDirectory protected property The original file directory, before it was changed for testing purposes.
DrupalTestCase::$originalPrefix protected property The original database prefix, before it was changed for testing purposes.
DrupalTestCase::$results public property Current results of this test case.
DrupalTestCase::$skipClasses protected property This class is skipped when looking for the source of an assertion.
DrupalTestCase::$testId protected property The test run ID.
DrupalTestCase::$timeLimit protected property Time limit for the test.
DrupalTestCase::assert protected function Internal helper: stores the assert.
DrupalTestCase::assertEqual protected function Check to see if two values are equal.
DrupalTestCase::assertFalse protected function Check to see if a value is false (an empty string, 0, NULL, or FALSE).
DrupalTestCase::assertIdentical protected function Check to see if two values are identical.
DrupalTestCase::assertNotEqual protected function Check to see if two values are not equal.
DrupalTestCase::assertNotIdentical protected function Check to see if two values are not identical.
DrupalTestCase::assertNotNull protected function Check to see if a value is not NULL.
DrupalTestCase::assertNull protected function Check to see if a value is NULL.
DrupalTestCase::assertTrue protected function Check to see if a value is not false (not an empty string, 0, NULL, or FALSE).
DrupalTestCase::deleteAssert public static function Delete an assertion record by message ID.
DrupalTestCase::error protected function Fire an error assertion.
DrupalTestCase::errorHandler public function Handle errors during test runs.
DrupalTestCase::exceptionHandler protected function Handle exceptions.
DrupalTestCase::fail protected function Fire an assertion that is always negative.
DrupalTestCase::generatePermutations public static function Converts a list of possible parameters into a stack of permutations.
DrupalTestCase::getAssertionCall protected function Cycles through backtrace until the first non-assertion method is found.
DrupalTestCase::insertAssert public static function Store an assertion from outside the testing context.
DrupalTestCase::pass protected function Fire an assertion that is always positive.
DrupalTestCase::randomName public static function Generates a random string containing letters and numbers.
DrupalTestCase::randomString public static function Generates a random string of ASCII characters of codes 32 to 126.
DrupalTestCase::run public function Run all tests in this class.
DrupalTestCase::verbose protected function Logs verbose message in a text file.
DrupalWebTestCase::$additionalCurlOptions protected property Additional cURL options.
DrupalWebTestCase::$content protected property The content of the page currently loaded in the internal browser.
DrupalWebTestCase::$cookieFile protected property The current cookie file used by cURL.
DrupalWebTestCase::$curlHandle protected property The handle of the current cURL connection.
DrupalWebTestCase::$drupalSettings protected property The value of the Drupal.settings JavaScript variable for the page currently loaded in the internal browser.
DrupalWebTestCase::$elements protected property The parsed version of the page.
DrupalWebTestCase::$generatedTestFiles protected property Whether the files were copied to the test files directory.
DrupalWebTestCase::$headers protected property The headers of the page currently loaded in the internal browser.
DrupalWebTestCase::$httpauth_credentials protected property HTTP authentication credentials (<username>:<password>).
DrupalWebTestCase::$httpauth_method protected property HTTP authentication method
DrupalWebTestCase::$loggedInUser protected property The current user logged in using the internal browser.
DrupalWebTestCase::$originalUser protected property The original user, before it was changed to a clean uid = 1 for testing purposes.
DrupalWebTestCase::$plainTextContent protected property The content of the page currently loaded in the internal browser (plain text version).
DrupalWebTestCase::$profile protected property The profile to install as a basis for testing.
DrupalWebTestCase::$redirect_count protected property The number of redirects followed during the handling of a request.
DrupalWebTestCase::$session_id protected property The current session ID, if available.
DrupalWebTestCase::$session_name protected property The current session name, if available.
DrupalWebTestCase::$url protected property The URL currently loaded in the internal browser.
DrupalWebTestCase::assertField protected function Asserts that a field exists with the given name or id.
DrupalWebTestCase::assertFieldById protected function Asserts that a field exists in the current page with the given id and value.
DrupalWebTestCase::assertFieldByName protected function Asserts that a field exists in the current page with the given name and value.
DrupalWebTestCase::assertFieldByXPath protected function Asserts that a field exists in the current page by the given XPath.
DrupalWebTestCase::assertFieldChecked protected function Asserts that a checkbox field in the current page is checked.
DrupalWebTestCase::assertLink protected function Pass if a link with the specified label is found, and optional with the specified index.
DrupalWebTestCase::assertLinkByHref protected function Pass if a link containing a given href (part) is found.
DrupalWebTestCase::assertMail protected function Asserts that the most recently sent e-mail message has the given value.
DrupalWebTestCase::assertMailPattern protected function Asserts that the most recently sent e-mail message has the pattern in it.
DrupalWebTestCase::assertMailString protected function Asserts that the most recently sent e-mail message has the string in it.
DrupalWebTestCase::assertNoDuplicateIds protected function Asserts that each HTML ID is used for just a single element.
DrupalWebTestCase::assertNoField protected function Asserts that a field does not exist with the given name or id.
DrupalWebTestCase::assertNoFieldById protected function Asserts that a field does not exist with the given id and value.
DrupalWebTestCase::assertNoFieldByName protected function Asserts that a field does not exist with the given name and value.
DrupalWebTestCase::assertNoFieldByXPath protected function Asserts that a field does not exist in the current page by the given XPath.
DrupalWebTestCase::assertNoFieldChecked protected function Asserts that a checkbox field in the current page is not checked.
DrupalWebTestCase::assertNoLink protected function Pass if a link with the specified label is not found.
DrupalWebTestCase::assertNoLinkByHref protected function Pass if a link containing a given href (part) is not found.
DrupalWebTestCase::assertNoOptionSelected protected function Asserts that a select option in the current page is not checked.
DrupalWebTestCase::assertNoPattern protected function Will trigger a pass if the perl regex pattern is not present in raw content.
DrupalWebTestCase::assertNoRaw protected function Pass if the raw text is NOT found on the loaded page, fail otherwise. Raw text refers to the raw HTML that the page generated.
DrupalWebTestCase::assertNoResponse protected function Asserts the page did not return the specified response code.
DrupalWebTestCase::assertNoText protected function Pass if the text is NOT found on the text version of the page. The text version is the equivalent of what a user would see when viewing through a web browser. In other words the HTML has been filtered out of the contents.
DrupalWebTestCase::assertNoTitle protected function Pass if the page title is not the given string.
DrupalWebTestCase::assertNoUniqueText protected function Pass if the text is found MORE THAN ONCE on the text version of the page.
DrupalWebTestCase::assertOptionSelected protected function Asserts that a select option in the current page is checked.
DrupalWebTestCase::assertPattern protected function Will trigger a pass if the Perl regex pattern is found in the raw content.
DrupalWebTestCase::assertRaw protected function Pass if the raw text IS found on the loaded page, fail otherwise. Raw text refers to the raw HTML that the page generated.
DrupalWebTestCase::assertResponse protected function Asserts the page responds with the specified response code.
DrupalWebTestCase::assertText protected function Pass if the text IS found on the text version of the page. The text version is the equivalent of what a user would see when viewing through a web browser. In other words the HTML has been filtered out of the contents.
DrupalWebTestCase::assertTextHelper protected function Helper for assertText and assertNoText.
DrupalWebTestCase::assertTitle protected function Pass if the page title is the given string.
DrupalWebTestCase::assertUniqueText protected function Pass if the text is found ONLY ONCE on the text version of the page.
DrupalWebTestCase::assertUniqueTextHelper protected function Helper for assertUniqueText and assertNoUniqueText.
DrupalWebTestCase::assertUrl protected function Pass if the internal browser's URL matches the given path.
DrupalWebTestCase::buildXPathQuery protected function Builds an XPath query.
DrupalWebTestCase::checkForMetaRefresh protected function Check for meta refresh tag and if found call drupalGet() recursively. This function looks for the http-equiv attribute to be set to "Refresh" and is case-sensitive.
DrupalWebTestCase::checkPermissions protected function Check to make sure that the array of permissions are valid.
DrupalWebTestCase::clickLink protected function Follows a link by name.
DrupalWebTestCase::constructFieldXpath protected function Helper function: construct an XPath for the given set of attributes and value.
DrupalWebTestCase::cronRun protected function Runs cron in the Drupal installed by Simpletest.
DrupalWebTestCase::curlClose protected function Close the cURL handler and unset the handler.
DrupalWebTestCase::curlExec protected function Initializes and executes a cURL request.
DrupalWebTestCase::curlHeaderCallback protected function Reads headers and registers errors received from the tested site.
DrupalWebTestCase::curlInitialize protected function Initializes the cURL connection.
DrupalWebTestCase::drupalCompareFiles protected function Compare two files based on size and file name.
DrupalWebTestCase::drupalCreateContentType protected function Creates a custom content type based on default settings.
DrupalWebTestCase::drupalCreateNode protected function Creates a node based on default settings.
DrupalWebTestCase::drupalCreateRole protected function Internal helper function; Create a role with specified permissions.
DrupalWebTestCase::drupalCreateUser protected function Create a user with a given set of permissions. The permissions correspond to the names given on the privileges page.
DrupalWebTestCase::drupalGet protected function Retrieves a Drupal path or an absolute path.
DrupalWebTestCase::drupalGetContent protected function Gets the current raw HTML of requested page.
DrupalWebTestCase::drupalGetHeader protected function Gets the value of an HTTP response header. If multiple requests were required to retrieve the page, only the headers from the last request will be checked by default. However, if TRUE is passed as the second argument, all requests will be processed…
DrupalWebTestCase::drupalGetHeaders protected function Gets the HTTP response headers of the requested page. Normally we are only interested in the headers returned by the last request. However, if a page is redirected or HTTP authentication is in use, multiple requests will be required to retrieve the…
DrupalWebTestCase::drupalGetMails protected function Gets an array containing all e-mails sent during this test case.
DrupalWebTestCase::drupalGetNodeByTitle function Get a node from the database based on its title.
DrupalWebTestCase::drupalGetSettings protected function Gets the value of the Drupal.settings JavaScript variable for the currently loaded page.
DrupalWebTestCase::drupalGetTestFiles protected function Get a list files that can be used in tests.
DrupalWebTestCase::drupalGetToken protected function Generate a token for the currently logged in user.
DrupalWebTestCase::drupalHead protected function Retrieves only the headers for a Drupal path or an absolute path.
DrupalWebTestCase::drupalLogin protected function Log in a user with the internal browser.
DrupalWebTestCase::drupalLogout protected function
DrupalWebTestCase::drupalPost protected function Execute a POST request on a Drupal page. It will be done as usual POST request with SimpleBrowser.
DrupalWebTestCase::drupalSetContent protected function Sets the raw HTML content. This can be useful when a page has been fetched outside of the internal browser and assertions need to be made on the returned page.
DrupalWebTestCase::drupalSetSettings protected function Sets the value of the Drupal.settings JavaScript variable for the currently loaded page.
DrupalWebTestCase::getAbsoluteUrl protected function Takes a path and returns an absolute path.
DrupalWebTestCase::getAllOptions protected function Get all option elements, including nested options, in a select.
DrupalWebTestCase::getSelectedItem protected function Get the selected value from a select field.
DrupalWebTestCase::getUrl protected function Get the current url from the cURL handler.
DrupalWebTestCase::handleForm protected function Handle form input related to drupalPost(). Ensure that the specified fields exist and attempt to create POST data in the correct manner for the particular field type.
DrupalWebTestCase::parse protected function Parse content returned from curlExec using DOM and SimpleXML.
DrupalWebTestCase::refreshVariables protected function Refresh the in-memory set of variables. Useful after a page request is made that changes a variable in a different thread.
DrupalWebTestCase::resetAll protected function Reset all data structures after having enabled new modules.
DrupalWebTestCase::tearDown protected function Delete created files and temporary files directory, delete the tables created by setUp(), and reset the database prefix.
DrupalWebTestCase::verboseEmail protected function Outputs to verbose the most recent $count emails sent.
DrupalWebTestCase::xpath protected function Perform an xpath search on the contents of the internal browser. The search is relative to the root element (HTML tag normally) of the page.
DrupalWebTestCase::__construct function Constructor for DrupalWebTestCase. Overrides DrupalTestCase::__construct