Beta 9: automated tests, module_invoke(), and drush

When I tried to run the automated tests, none of them showed up in the list of available tests for the Testing module's configuration.

It turns out that there is a new requirement for writing test classes, namely,

Your test class needs a phpDoc comment block with a description and a @group annotation, which gives information about the test.

So, for example, by adding @group in the following comment block, the test class was recognized and listed under the Optimizely grouping. The lead paragraph of the comment block is treated as a description and is displayed accordingly in the listing.

/**
 * Create users with no, some, and optimizely permissions
 * to test access to module related pages.
 *
 * @group Optimizely
 */
class OptimizelyAccessTest extends WebTestBase { . . . . }


This @group annotation seems to have been created specifically for the Testing module and is not part of the general documentation standards.

Sources:

Automated tests
https://api.drupal.org/api/drupal/core!modules!system!core.api.php/group/testing/8

API documentation and comment standards
https://www.drupal.org/coding-standards/docs

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Fatal error: Call to undefined function Drupal\optimizely\Tests\module_invoke()

Function module_invoke() has been removed. I replaced this call,

  $schema = module_invoke('optimizely', 'schema');

 with this one.

  $schema = \Drupal::moduleHandler()
              ->invoke('optimizely', 'schema');

Generally speaking, interface ModuleHandlerInterface and class ModuleHandler provide the functionality that was previously in functions such as this one as well as module_list() and module_implements() which have also been removed.

Sources:

Remove bootstrap.inc  module_invoke()
https://www.drupal.org/node/2330181

Module/hook system functions replaced with module_handler and module_installer
https://www.drupal.org/node/1894902 

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Running drush on a freshly-installed Beta 9 site gave the error message, 

Drupal\Core\DependencyInjection\ContainerNotInitializedException: \Drupal::$container is not initialized yet. \Drupal::setContainer() must be called with a real container. in Drupal::getContainer() (line 129 of /var/www/html/opti/core/lib/Drupal.php).

I was using a version of drush 7 from January. Downloading and installing the current drush 7.0-dev  fixed this problem.

Sources:

Installing Drush for Drupal 8
http://optimizely-to-drupal-8.blogspot.com/2015/01/installing-drush-for-drupal-8.html