diff --git a/src/js.rs b/src/js.rs index fd16b23e..677f7a32 100644 --- a/src/js.rs +++ b/src/js.rs @@ -205,6 +205,13 @@ extern { #[wasm_bindgen(method)] pub fn slice(this: &Array, start: u32, end: u32) -> Array; + /// The some() method tests whether at least one element in the array passes the test implemented + /// by the provided function. + /// Note: This method returns false for any condition put on an empty array. + /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some + #[wasm_bindgen(method)] + pub fn some(this: &Array, predicate: &mut FnMut(JsValue) -> bool) -> bool; + /// The sort() method sorts the elements of an array in place and returns /// the array. The sort is not necessarily stable. The default sort /// order is according to string Unicode code points. diff --git a/tests/all/js_globals/Array.rs b/tests/all/js_globals/Array.rs index 8e8173de..af11ce9c 100644 --- a/tests/all/js_globals/Array.rs +++ b/tests/all/js_globals/Array.rs @@ -143,6 +143,37 @@ fn sort() { .test() } +#[test] +fn some() { + project() + .file("src/lib.rs", r#" + #![feature(proc_macro, wasm_custom_section)] + + extern crate wasm_bindgen; + use wasm_bindgen::prelude::*; + use wasm_bindgen::js; + + #[wasm_bindgen] + pub fn has_elem(array: &js::Array, arg: JsValue) -> bool { + array.some(&mut |elem| arg == elem) + } + + "#) + .file("test.ts", r#" + import * as assert from "assert"; + import * as wasm from "./out"; + + export function test() { + let elements = ["z", 1, "y", 2]; + + assert.deepStrictEqual(wasm.has_elem(elements, 2), true); + assert.deepStrictEqual(wasm.has_elem(elements, "y"), true); + assert.deepStrictEqual(wasm.has_elem(elements, "not an element"), false); + } + "#) + .test() +} + #[test] fn last_index_of() { project()