SimpleTest

The SimpleTest module is a framework for running automated unit tests in Drupal. It can be used to verify a working state of Drupal before and after any code changes, or as a means for developers to write and execute tests for their modules.

Visit Administer >> Site building >> SimpleTest to display a list of available tests. For comprehensive testing, select all tests, or individually select tests for more targeted testing. Note that it might take several minutes for all tests to complete.)