Add to_fixed and to_exponential function

This commit is contained in:
Sendil Kumar 2018-06-24 10:08:23 +02:00
parent 4c7b2677de
commit 0f57398917
2 changed files with 78 additions and 0 deletions

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@ -246,6 +246,20 @@ extern {
#[wasm_bindgen(catch, method, js_name = toPrecision)]
pub fn to_precision(this: &Number, precision: u8) -> Result<String, JsValue>;
/// The toFixed() method returns a string representing the Number
/// object using fixed-point notation.
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed
#[wasm_bindgen(catch, method, js_name = toFixed)]
pub fn to_fixed(this: &Number, digits: u8) -> Result<String, JsValue>;
/// The toExponential() method returns a string representing the Number
/// object in exponential notation.
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed
#[wasm_bindgen(catch, method, js_name = toExponential)]
pub fn to_exponential(this: &Number, fraction_digits: u8) -> Result<String, JsValue>;
/// The toString() method returns a string representing the
/// specified Number object.
///

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@ -125,3 +125,67 @@ fn value_of() {
"#)
.test()
}
#[test]
fn to_fixed() {
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 to_fixed(this: &js::Number, digits: u8) -> String {
let result = this.to_fixed(digits);
let result = match result {
Ok(num) => num,
Err(_err) => "RangeError".to_string()
};
result
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
assert.equal(wasm.to_fixed(123.456, 2), "123.46");
assert.equal(wasm.to_fixed(10, 101), "RangeError");
}
"#)
.test()
}
#[test]
fn to_exponential() {
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 to_exponential(this: &js::Number, fraction_digits: u8) -> String {
let result = this.to_exponential(fraction_digits);
let result = match result {
Ok(num) => num,
Err(_err) => "RangeError".to_string()
};
result
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
assert.equal(wasm.to_exponential(123456, 2), "1.23e+5");
assert.equal(wasm.to_exponential(10, 101), "RangeError");
}
"#)
.test()
}