#[ test ]
fn from_components()
{
let o1 = Options1 { field1: 42, field2: "Hello, world!".to_string(), field3: 13.01 };
let o2: Options2 = Into :: < Options2 > ::into( &o1 );
let exp = Options2 { field1: 42, field2: "Hello, world!".to_string() };
assert_eq!( o2, exp );
let o2: Options2 = (&o1).into();
assert_eq!( o2, exp );
}