New simpletest class property $modules to enable modules in tests instead of WebTestBase::setUp($modules)

In Drupal 7, a list of modules could be passed to the setUp() method of a simpletest automated test to enable those modules in the test methods. Instead in Drupal 8, a public static class property is used.

Sometimes the setUp method was only used to enable modules. In those cases, it can be removed entirely.

Drupal 7

class NodeLoadHooksTestCase extends DrupalWebTestCase {
  function setUp() {
    parent::setUp('node_test');
  }

  // ...
}

Drupal 8

class NodeLoadHooksTest extends NodeTestBase {
  public static $modules = array('node_test');

  // ...
}

In other cases, setUp() was used for other things as well. In these cases, continue to call parent::setUp(), but pass no arguments.

Drupal 7

class NodeCreationTestCase extends DrupalWebTestCase {
  function setUp() {
    parent::setUp('node_test_exception');

    $web_user = $this->drupalCreateUser(array('create page content', 'edit own page content'));
    $this->drupalLogin($web_user);
  }

  // ...
}

Drupal 8

class NodeCreationTest extends NodeTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = array('node_test_exception');

  function setUp() {
    parent::setUp();

    $web_user = $this->drupalCreateUser(array('create page content', 'edit own page content'));
    $this->drupalLogin($web_user);
  }

  // ...
}