Example of an abstract Drupal Web Test Case

SiteTesting.php

<?php
/**
 * @file
 * Common testing class for this Drupal site.
 */
abstract class SiteTesting extends DrupalWebTestCase {
 
  /**
   * Overrides default set up handler to prevent database sand-boxing.
   */
  protected function setUp() {
    // Use the test mail class instead of the default mail handler class.
    variable_set('mail_system', array('default-system' => 'TestingMailSystem'));
    $this->originalFileDirectory = variable_get('file_public_path', conf_path() . '/files');
    $this->public_files_directory = $this->originalFileDirectory;
    $this->private_files_directory = variable_get('file_private_path');
    $this->temp_files_directory = file_directory_temp();
 
    drupal_set_time_limit($this->timeLimit);
    $this->setup = TRUE;
  }
 
  /**
   * Overrides default tear down handler to prevent database sandbox deletion.
   */
  protected function tearDown() {
    // In case a fatal error occurred that was not in the test process read the
    // log to pick up any fatal errors.
    simpletest_log_read($this->testId, $this->databasePrefix, get_class($this), TRUE);
 
    $emailCount = count(variable_get('drupal_test_email_collector', array()));
    if ($emailCount) {
      $message = format_plural($emailCount, '1 e-mail was sent during this test.', '@count e-mails were sent during this test.');
      $this->pass($message, t('E-mail'));
    }
 
    // Close the CURL handler.
    $this->curlClose();
  }
}