add binding for lastIndexOf

This commit is contained in:
Matt Long 2018-06-20 17:36:35 -04:00
parent 4a96ba3c72
commit 667733e929
2 changed files with 45 additions and 0 deletions

View File

@ -105,4 +105,11 @@ extern {
/// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf
#[wasm_bindgen(method, js_name = indexOf)]
pub fn index_of(this: &Array, value: JsValue, from_index: i32) -> i32;
/// The lastIndexOf() method returns the last index at which a given element can be found in the array, or -1 if it is not present.
/// The array is searched backwards, starting at fromIndex.
///
/// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/lastIndexOf
#[wasm_bindgen(method, js_name = lastIndexOf)]
pub fn last_index_of(this: &Array, value: JsValue, from_index: i32) -> i32;
}

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@ -39,3 +39,41 @@ fn index_of() {
"#)
.test()
}
#[test]
fn last_index_of() {
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 get_last_index_of(this: &js::Array, value: JsValue, from_index: i32) -> i32 {
this.last_index_of(value, from_index)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let characters = ["a", "x", "c", "x", "n"];
let index = wasm.get_last_index_of(characters, "x", 5);
let notFoundIndex = wasm.get_last_index_of(characters, "z", 5);
assert.equal(index, 3);
assert.equal(notFoundIndex, -1);
let withFromIndex = wasm.get_last_index_of(characters, "x", 2);
let withFromIndexNotFound = wasm.get_last_index_of(characters, "x", 0);
assert.equal(withFromIndex, 1);
assert.equal(withFromIndexNotFound, -1);
}
"#)
.test()
}