add binding for copyWithin

This commit is contained in:
Matt Long 2018-06-20 17:51:02 -04:00
parent d155136f0e
commit 2f6f734216
2 changed files with 41 additions and 1 deletions

View File

@ -133,4 +133,10 @@ extern {
/// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fill
#[wasm_bindgen(method)]
pub fn fill(this: &Array, value: JsValue, start: u32, end: u32) -> Array;
/// The copyWithin() method shallow copies part of an array to another location in the same array and returns it, without modifying its size.
///
/// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/copyWithin
#[wasm_bindgen(method, js_name = copyWithin)]
pub fn copy_within(this: &Array, target: i32, start: i32, end: i32) -> Array;
}

View File

@ -168,4 +168,38 @@ fn fill() {
}
"#)
.test()
}
}
#[test]
fn copy_within() {
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 copy_values_within_array(this: &js::Array, target: i32, start: i32, end: i32) -> js::Array {
this.copy_within(target, start, end)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let characters = [8, 5, 4, 3, 1, 2]
wasm.copy_values_within_array(characters, 1, 4, 5);
assert.equal(characters[1], 1);
// if negatives were used
wasm.copy_values_within_array(characters, -1, -3, -2);
assert.equal(characters[5], 3);
}
"#)
.test()
}