/**
  * @see HTTPS_Resource_Proxy::filter_query_vars()
  */
 function test_filter_query_vars()
 {
     $instance = new HTTPS_Resource_Proxy($this->plugin);
     $query_vars = $instance->filter_query_vars(array());
     $this->assertContains(HTTPS_Resource_Proxy::NONCE_QUERY_VAR, $query_vars);
     $this->assertContains(HTTPS_Resource_Proxy::HOST_QUERY_VAR, $query_vars);
     $this->assertContains(HTTPS_Resource_Proxy::PATH_QUERY_VAR, $query_vars);
 }