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https://github.com/fluencelabs/wasm-bindgen
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Add to_fixed and to_exponential function
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14
src/js.rs
14
src/js.rs
@ -246,6 +246,20 @@ extern {
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#[wasm_bindgen(catch, method, js_name = toPrecision)]
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pub fn to_precision(this: &Number, precision: u8) -> Result<String, JsValue>;
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/// The toFixed() method returns a string representing the Number
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/// object using fixed-point notation.
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///
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/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed
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#[wasm_bindgen(catch, method, js_name = toFixed)]
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pub fn to_fixed(this: &Number, digits: u8) -> Result<String, JsValue>;
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/// The toExponential() method returns a string representing the Number
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/// object in exponential notation.
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///
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/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed
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#[wasm_bindgen(catch, method, js_name = toExponential)]
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pub fn to_exponential(this: &Number, fraction_digits: u8) -> Result<String, JsValue>;
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/// The toString() method returns a string representing the
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/// specified Number object.
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///
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@ -125,3 +125,67 @@ fn value_of() {
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"#)
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.test()
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}
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#[test]
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fn to_fixed() {
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project()
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.file("src/lib.rs", r#"
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#![feature(proc_macro, wasm_custom_section)]
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extern crate wasm_bindgen;
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use wasm_bindgen::prelude::*;
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use wasm_bindgen::js;
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#[wasm_bindgen]
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pub fn to_fixed(this: &js::Number, digits: u8) -> String {
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let result = this.to_fixed(digits);
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let result = match result {
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Ok(num) => num,
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Err(_err) => "RangeError".to_string()
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};
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result
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}
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"#)
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.file("test.ts", r#"
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import * as assert from "assert";
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import * as wasm from "./out";
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export function test() {
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assert.equal(wasm.to_fixed(123.456, 2), "123.46");
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assert.equal(wasm.to_fixed(10, 101), "RangeError");
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}
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"#)
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.test()
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}
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#[test]
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fn to_exponential() {
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project()
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.file("src/lib.rs", r#"
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#![feature(proc_macro, wasm_custom_section)]
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extern crate wasm_bindgen;
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use wasm_bindgen::prelude::*;
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use wasm_bindgen::js;
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#[wasm_bindgen]
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pub fn to_exponential(this: &js::Number, fraction_digits: u8) -> String {
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let result = this.to_exponential(fraction_digits);
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let result = match result {
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Ok(num) => num,
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Err(_err) => "RangeError".to_string()
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};
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result
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}
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"#)
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.file("test.ts", r#"
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import * as assert from "assert";
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import * as wasm from "./out";
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export function test() {
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assert.equal(wasm.to_exponential(123456, 2), "1.23e+5");
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assert.equal(wasm.to_exponential(10, 101), "RangeError");
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}
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"#)
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.test()
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}
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