libfringe/tests/generator.rs

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// This file is part of libfringe, a low-level green threading library.
// Copyright (c) whitequark <whitequark@whitequark.org>
// See the LICENSE file included in this distribution.
extern crate fringe;
use fringe::OsStack;
use fringe::generator::Generator;
#[test]
fn generator() {
let stack = OsStack::new(0).unwrap();
let mut gen = Generator::new(stack, move |yielder| {
for i in 1..4 {
yielder.generate(i);
}
});
assert_eq!(gen.next(), Some(1));
assert_eq!(gen.next(), Some(2));
assert_eq!(gen.next(), Some(3));
assert_eq!(gen.next(), None);
}
#[test]
fn move_after_new() {
let stack = OsStack::new(0).unwrap();
let mut gen = Generator::new(stack, move |yielder| {
for i in 1..4 {
yielder.generate(i);
}
});
assert_eq!(gen.next(), Some(1));
#[inline(never)]
fn rest(mut gen: Generator<u32, OsStack>) {
assert_eq!(gen.next(), Some(2));
assert_eq!(gen.next(), Some(3));
assert_eq!(gen.next(), None);
}
rest(gen);
}
#[test]
#[should_panic]
fn panic_safety() {
struct Wrapper {
gen: Generator<u32, OsStack>
}
impl Drop for Wrapper {
fn drop(&mut self) {
self.gen.next();
}
}
let stack = OsStack::new(4 << 20).unwrap();
let gen = Generator::new(stack, move |_yielder| {
panic!("foo")
});
let mut wrapper = Wrapper { gen: gen };
wrapper.gen.next();
}