1..6 # ->configure() ok 1 - ->configure() throws an InvalidArgumentException if a currency does not exist ok 2 - ->configure() can restrict the number of currencies with the currencies option # ->render() ok 3 - ->render() renders all currencies as option tags ok 4 - ->render() renders all currencies as option tags # add_empty ok 5 - ->render() renders an empty option if add_empty is true ok 6 - ->render() renders an empty option if add_empty is true Looks like everything went fine.