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Implement the Iterator trait for JS iterators

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This commit implements the standard library's `Iterator` trait for the
`js_sys::Iterator` type, using the iterator protocol described on [MDN]

Closes #777

[MDN]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols
This commit is contained in:
Alex Crichton
2018-09-06 21:18:42 -07:00
parent f18b10ca52
commit f2608d3155
2 changed files with 101 additions and 0 deletions
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28
crates/js-sys/tests/wasm/Set.rs
View File

@@ -89,3 +89,31 @@ fn set_inheritance() {
assert!(set.is_instance_of::<Object>());
let _: &Object = set.as_ref();
}
#[wasm_bindgen_test]
fn keys() {
let set = Set::new(&JsValue::undefined());
set.add(&1.into());
set.add(&2.into());
set.add(&3.into());
let list = set.keys().into_iter().map(|e| e.unwrap()).collect::<Vec<_>>();
assert_eq!(list.len(), 3);
assert!(list.iter().any(|l| *l == 1));
assert!(list.iter().any(|l| *l == 2));
assert!(list.iter().any(|l| *l == 3));
}
#[wasm_bindgen_test]
fn values() {
let set = Set::new(&JsValue::undefined());
set.add(&1.into());
set.add(&2.into());
set.add(&3.into());
let list = set.values().into_iter().map(|e| e.unwrap()).collect::<Vec<_>>();
assert_eq!(list.len(), 3);
assert!(list.iter().any(|l| *l == 1));
assert!(list.iter().any(|l| *l == 2));
assert!(list.iter().any(|l| *l == 3));
}