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String - length, trim, trimStart & trimLeft, trimEnd & trimRight

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This commit is contained in:
Lachezar Lechev 2018-06-26 22:10:25 +02:00
parent 16bc3eb7e7
commit 9f087241a1
2 changed files with 260 additions and 90 deletions
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43
src/js.rs
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@ -566,6 +566,13 @@ extern {
#[wasm_bindgen(js_name = JsString)]
pub type JsString;
/// The length property of a String object indicates the length of a string,
/// in UTF-16 code units.
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/length
#[wasm_bindgen(method, getter, structural)]
pub fn length(this: &JsString) -> u32;
/// The String object's charAt() method returns a new string consisting of the single
/// UTF-16 code unit located at the specified offset into the string.
///
@ -636,6 +643,42 @@ extern {
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substr
#[wasm_bindgen(method, js_class = "String")]
pub fn substr(this: &JsString, start: i32, length: i32) -> JsString;
/// The trim() method removes whitespace from both ends of a string.
/// Whitespace in this context is all the whitespace characters
/// (space, tab, no-break space, etc.) and all the line terminator characters (LF, CR, etc.).
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/trim
#[wasm_bindgen(method, js_class = "String")]
pub fn trim(this: &JsString) -> JsString;
/// The trimEnd() method removes whitespace from the end of a string.
/// trimRight() is an alias of this method.
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/trimEnd
#[wasm_bindgen(method, js_class = "String", js_name = trimEnd)]
pub fn trim_end(this: &JsString) -> JsString;
/// The trimEnd() method removes whitespace from the end of a string.
/// trimRight() is an alias of this method.
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/trimEnd
#[wasm_bindgen(method, js_class = "String", js_name = trimRight)]
pub fn trim_right(this: &JsString) -> JsString;
/// The trimStart() method removes whitespace from the beginning of a string.
/// trimLeft() is an alias of this method.
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/trimStart
#[wasm_bindgen(method, js_class = "String", js_name = trimStart)]
pub fn trim_start(this: &JsString) -> JsString;
/// The trimStart() method removes whitespace from the beginning of a string.
/// trimLeft() is an alias of this method.
///
/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/trimStart
#[wasm_bindgen(method, js_class = "String", js_name = trimLeft)]
pub fn trim_left(this: &JsString) -> JsString;
}
impl<'a> From<&'a str> for JsString {

301
tests/all/js_globals/JsString.rs
View File

@ -2,6 +2,37 @@
use project;
#[test]
fn length() {
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 string_length(this: &js::JsString) -> u32 {
this.length()
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let x = 'Mozilla';
assert.equal(wasm.string_length(x), 7);
let empty = '';
assert.equal(wasm.string_length(empty), 0);
}
"#)
.test()
}
#[test]
fn char_at() {
project()
@ -31,6 +62,35 @@ fn char_at() {
.test()
}
#[test]
fn char_code_at() {
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 string_char_code_at(this: &js::JsString, index: u32) -> js::Number {
this.char_code_at(index)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
var anyString = 'Brave new world';
export function test() {
assert.equal(wasm.string_char_code_at(anyString, 0), 66);
assert.ok(isNaN(wasm.string_char_code_at(anyString, 999)));
}
"#)
.test()
}
#[test]
fn code_point_at() {
project()
@ -92,7 +152,7 @@ fn concat() {
}
#[test]
fn char_code_at() {
fn includes() {
project()
.file("src/lib.rs", r#"
#![feature(proc_macro, wasm_custom_section)]
@ -102,19 +162,93 @@ fn char_code_at() {
use wasm_bindgen::js;
#[wasm_bindgen]
pub fn string_char_code_at(this: &js::JsString, index: u32) -> js::Number {
this.char_code_at(index)
pub fn string_includes(this: &js::JsString, search_value: &js::JsString, position: i32) -> bool {
this.includes(search_value, position)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
var anyString = 'Brave new world';
export function test() {
let str = "Blue Whale";
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_includes(str, 'Blue', 0), true);
assert.equal(wasm.string_includes(str, 'Blute', 0), false);
assert.equal(wasm.string_includes(str, 'Whale', 0), true);
assert.equal(wasm.string_includes(str, 'Whale', 5), true);
assert.equal(wasm.string_includes(str, 'Whale', 7), false);
assert.equal(wasm.string_includes(str, '', 0), true);
assert.equal(wasm.string_includes(str, '', 16), true);
}
"#)
.test()
}
#[test]
fn 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 string_index_of(this: &js::JsString, search_value: &js::JsString, from_index: i32) -> i32 {
this.index_of(search_value, from_index)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
assert.equal(wasm.string_char_code_at(anyString, 0), 66);
assert.ok(isNaN(wasm.string_char_code_at(anyString, 999)));
let str = "Blue Whale";
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_index_of(str, 'Blue', 0), 0);
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_index_of(str, 'Blute', 0), -1);
assert.equal(wasm.string_index_of(str, 'Whale', 0), 5);
assert.equal(wasm.string_index_of(str, 'Whale', 5), 5);
assert.equal(wasm.string_index_of(str, 'Whale', 7), -1);
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_index_of(str, '', 0), 0);
assert.equal(wasm.string_index_of(str, '', 9), 9);
assert.equal(wasm.string_index_of(str, '', 10), 10);
assert.equal(wasm.string_index_of(str, '', 11), 10);
}
"#)
.test()
}
#[test]
fn slice() {
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 create_slice(this: &js::JsString, start: u32, end: u32) -> js::JsString {
this.slice(start, end)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let characters = "acxn18";
let subset = wasm.create_slice(characters, 1, 3);
assert.equal(subset, "cx");
}
"#)
.test()
@ -190,74 +324,6 @@ fn substring() {
.test()
}
#[test]
fn 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 string_index_of(this: &js::JsString, search_value: &js::JsString, from_index: i32) -> i32 {
this.index_of(search_value, from_index)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let str = "Blue Whale";
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_index_of(str, 'Blue', 0), 0);
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_index_of(str, 'Blute', 0), -1);
assert.equal(wasm.string_index_of(str, 'Whale', 0), 5);
assert.equal(wasm.string_index_of(str, 'Whale', 5), 5);
assert.equal(wasm.string_index_of(str, 'Whale', 7), -1);
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_index_of(str, '', 0), 0);
assert.equal(wasm.string_index_of(str, '', 9), 9);
assert.equal(wasm.string_index_of(str, '', 10), 10);
assert.equal(wasm.string_index_of(str, '', 11), 10);
}
"#)
.test()
}
#[test]
fn slice() {
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 create_slice(this: &js::JsString, start: u32, end: u32) -> js::JsString {
this.slice(start, end)
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let characters = "acxn18";
let subset = wasm.create_slice(characters, 1, 3);
assert.equal(subset, "cx");
}
"#)
.test()
}
#[test]
fn substr() {
project()
@ -295,7 +361,7 @@ fn substr() {
}
#[test]
fn includes() {
fn trim() {
project()
.file("src/lib.rs", r#"
#![feature(proc_macro, wasm_custom_section)]
@ -305,8 +371,8 @@ fn includes() {
use wasm_bindgen::js;
#[wasm_bindgen]
pub fn string_includes(this: &js::JsString, search_value: &js::JsString, position: i32) -> bool {
this.includes(search_value, position)
pub fn string_trim(this: &js::JsString) -> js::JsString {
this.trim()
}
"#)
.file("test.ts", r#"
@ -314,16 +380,77 @@ fn includes() {
import * as wasm from "./out";
export function test() {
let str = "Blue Whale";
// TODO: remove second parameter once we have optional parameters
assert.equal(wasm.string_includes(str, 'Blue', 0), true);
assert.equal(wasm.string_includes(str, 'Blute', 0), false);
assert.equal(wasm.string_includes(str, 'Whale', 0), true);
assert.equal(wasm.string_includes(str, 'Whale', 5), true);
assert.equal(wasm.string_includes(str, 'Whale', 7), false);
assert.equal(wasm.string_includes(str, '', 0), true);
assert.equal(wasm.string_includes(str, '', 16), true);
assert.equal(wasm.string_trim(' foo '), 'foo');
// Another example of .trim() removing whitespace from just one side.
assert.equal(wasm.string_trim('foo '), 'foo');
}
"#)
.test()
}
#[test]
fn trim_end_and_trim_right() {
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 string_trim_end(this: &js::JsString) -> js::JsString {
this.trim_end()
}
#[wasm_bindgen]
pub fn string_trim_right(this: &js::JsString) -> js::JsString {
this.trim_right()
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let greeting = ' Hello world! ';
let trimmed = ' Hello world!';
assert.equal(wasm.string_trim_end(greeting), trimmed);
assert.equal(wasm.string_trim_right(greeting), trimmed);
}
"#)
.test()
}
#[test]
fn trim_start_and_trim_left() {
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 string_trim_start(this: &js::JsString) -> js::JsString {
this.trim_start()
}
#[wasm_bindgen]
pub fn string_trim_left(this: &js::JsString) -> js::JsString {
this.trim_left()
}
"#)
.file("test.ts", r#"
import * as assert from "assert";
import * as wasm from "./out";
export function test() {
let greeting = ' Hello world! ';
let trimmed = 'Hello world! ';
assert.equal(wasm.string_trim_start(greeting), trimmed);
assert.equal(wasm.string_trim_left(greeting), trimmed);
}
"#)
.test()