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|
use magnus::{block::Yield, eval, method, prelude::*, rb_assert, Ruby, Value};
fn count_to_3(ruby: &Ruby, rb_self: Value) -> Yield<impl Iterator<Item = u8>> {
if ruby.block_given() {
Yield::Iter((1..=3).into_iter())
} else {
Yield::Enumerator(rb_self.enumeratorize("count_to_3", ()))
}
}
#[test]
fn it_converts_iterator_to_yields() {
let ruby = unsafe { magnus::embed::init() };
ruby.define_global_function("count_to_3", method!(count_to_3, 0));
let a = ruby.ary_new();
let _: Value = eval!(
ruby,
"
count_to_3 do |i|
a << i
end
",
a
)
.unwrap();
rb_assert!(ruby, "a == [1,2,3]", a);
let enumerator: Value = eval!(
ruby,
"
def raises
yield
false
rescue StopIteration
true
end
count_to_3
"
)
.unwrap();
rb_assert!(ruby, "enumerator.next == 1 && enumerator.next == 2 && enumerator.next == 3 && raises { enumerator.next }", enumerator);
}
|
