/**
  * Get the JS tracking code in HTML - Test if it is a string
  *
  * @covers AGA|Frontend|Render->get_html_tracking_code()
  */
 public function test_get_html_tracking_code_IS_string()
 {
     $this->assertTrue(is_string($this->instance->get_html_tracking_code()));
 }
 /**
  * Add the HTML tracking code in the WP head
  *
  * @return null|string
  */
 public function add_tracking_code()
 {
     $render = new Render();
     echo $render->get_html_tracking_code();
 }