1 system.test EnableDisableTestCase::testEnableDisable()

Test that all core modules can be enabled, disabled and uninstalled.


core/modules/system/tests/system.test, line 131
Tests for system.module.


Test module enabling/disabling functionality.


function testEnableDisable() {
  // Try to enable, disable and uninstall all core modules.
  $modules = system_rebuild_module_data();
  foreach ($modules as $name => $module) {
    // Check the "version" key matches the Backdrop version to restrict to
    // core modules only.
    if (!strstr($module->uri, 'core/modules')) {

    // Exclude hidden, required, or testing-only modules.
    if ($module->info['package'] == 'Testing' || !empty($module->info['hidden']) || !empty($module->info['required'])) {
  $this->assertTrue(count($modules), format_string('Found @count core modules that we can try to enable in this test.', array('@count' => count($modules))));

  // Enable the dblog module first, since we will be asserting the presence
  // of log messages throughout the test.
  if (isset($modules['dblog'])) {
    $modules = array('dblog' => $modules['dblog']) + $modules;

  // Set a variable so that the hook implementations in system_test.module
  // will display messages via backdrop_set_message().
  state_set('test_verbose_module_hooks', TRUE);

  // Throughout this test, some modules may be automatically enabled (due to
  // dependencies). We'll keep track of them in an array, so we can handle
  // them separately.
  $automatically_enabled = array();

  // Go through each module in the list and try to enable it (unless it was
  // already enabled automatically due to a dependency).
  foreach ($modules as $name => $module) {
    if (empty($automatically_enabled[$name])) {
      // Start a list of modules that we expect to be enabled this time.
      $modules_to_enable = array($name);

      // Find out if the module has any dependencies that aren't enabled yet;
      // if so, add them to the list of modules we expect to be automatically
      // enabled.
      foreach (array_keys($module->requires) as $dependency) {
        if (isset($modules[$dependency]) && empty($automatically_enabled[$dependency])) {
          $modules_to_enable[] = $dependency;
          $automatically_enabled[$dependency] = TRUE;

      // Check that each module is not yet enabled and does not have any
      // database tables yet.
      foreach ($modules_to_enable as $module_to_enable) {
        $this->assertModules(array($module_to_enable), FALSE);

      // Install and enable the module.
      $edit = array();
      $edit['modules[' . $module->info['package'] . '][' . $name . '][enable]'] = $name;
      $this->backdropPost('admin/modules', $edit, t('Save configuration'));
      // Handle the case where modules were installed along with this one and
      // where we therefore hit a confirmation screen.
      if (count($modules_to_enable) > 1) {
        $this->backdropPost(NULL, array(), t('Continue'));
      $this->assertText(t('The configuration options have been saved.'), 'Modules status has been updated.');

      // Check that hook_modules_installed() and hook_modules_enabled() were
      // invoked with the expected list of modules, that each module's
      // database tables now exist, and that appropriate messages appear in
      // the logs.
      foreach ($modules_to_enable as $module_to_enable) {
        $this->assertText(t('hook_modules_installed fired for @module', array('@module' => $module_to_enable)));
        $this->assertText(t('hook_modules_enabled fired for @module', array('@module' => $module_to_enable)));
        $this->assertModules(array($module_to_enable), TRUE);
        $this->assertLogMessage('system', "%module module installed.", array('%module' => $module_to_enable), WATCHDOG_INFO);
        $this->assertLogMessage('system', "%module module enabled.", array('%module' => $module_to_enable), WATCHDOG_INFO);

      // Disable and uninstall the original module, and check appropriate
      // hooks, tables, and log messages. (Later, we'll go back and do the
      // same thing for modules that were enabled automatically.) Skip this
      // for the dblog module, because that is needed for the test; we'll go
      // back and do that one at the end also.
      if ($name != 'dblog') {

  // Go through all modules that were automatically enabled, and try to
  // disable and uninstall them one by one.
  while (!empty($automatically_enabled)) {
    $initial_count = count($automatically_enabled);
    foreach (array_keys($automatically_enabled) as $name) {
      // If the module can't be disabled due to dependencies, skip it and try
      // again the next time. Otherwise, try to disable it.
      $disabled_checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[' . $modules[$name]->info['package'] . '][' . $name . '][enable]"]');
      if (empty($disabled_checkbox) && $name != 'dblog') {
    $final_count = count($automatically_enabled);
    // If all checkboxes were disabled, something is really wrong with the
    // test. Throw a failure and avoid an infinite loop.
    if ($initial_count == $final_count) {
      $this->fail(t('Remaining modules could not be disabled.'));

  // Disable and uninstall the dblog module last, since we needed it for
  // assertions in all the above tests.
  if (isset($modules['dblog'])) {

  // Now that all modules have been tested, go back and try to enable them
  // all again at once. This tests two things:
  // - That each module can be successfully enabled again after being
  //   uninstalled.
  // - That enabling more than one module at the same time does not lead to
  //   any errors.
  $edit = array();
  foreach (array_keys($modules) as $name) {
    $edit['modules[' . $modules[$name]->info['package'] . '][' . $name . '][enable]'] = $name;
  $this->backdropPost('admin/modules', $edit, t('Save configuration'));
  $this->assertText(t('The configuration options have been saved.'), 'Modules status has been updated.');