1..7
# ->render()
ok 1 - ->render() renders a radio tag with the value checked
ok 2 - ->render() renders a radio tag using extra attributes
ok 3 - ->render() considers false to be an integer 0
ok 4 - ->render() considers true to be an integer 1
# group support
ok 5 - ->render() has support for groups
ok 6 - __construct() throws an RuntimeException if you don't pass a choices option
# choices as a callable
ok 7 - ->render() accepts a sfCallable as a choices option
 Looks like everything went fine.