function test_get_region_code_by_region_id()
 {
     $country = new WPSC_Country(self::COUNTRY_ID_WITH_REGIONS);
     // USA
     $region_code = $country->get_region_code_by_region_id(self::REGION_ID);
     // Oregon
     $this->assertEquals(self::REGION_CODE, $region_code);
     $country = new WPSC_Country(self::COUNTRY_ID_WITHOUT_REGIONS);
     // UK
     $region_code = $country->get_region_code_by_region_id(self::REGION_ID);
     // Oregon
     $this->assertEquals('', $region_code);
     // @TODO - What should we assert here?
 }