Sets up Drupal unit test environment.
Overrides DrupalUnitTestBase::setUp
DrupalUnitTestBase::$modules
function setUp() {
  parent::setUp();
  // Install the Filter module.
  $this
    ->installSchema('system', 'url_alias');
  $this
    ->enableModules(array(
    'user',
    'filter',
  ));
  // Create text format, associate CKEditor.
  $filtered_html_format = entity_create('filter_format', array(
    'format' => 'filtered_html',
    'name' => 'Filtered HTML',
    'weight' => 0,
    'filters' => array(),
  ));
  $filtered_html_format
    ->save();
  $editor = entity_create('editor', array(
    'format' => 'filtered_html',
    'editor' => 'ckeditor',
  ));
  $editor
    ->save();
}