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https://github.com/fluencelabs/wasm-bindgen
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Merge pull request #310 from elpiel/string-support
`String.prototype.startsWith`, `String.prototype.substring` and `String.prototype.indexOf`
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commit
02328cf9f6
22
src/js.rs
22
src/js.rs
@ -348,6 +348,14 @@ extern {
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#[wasm_bindgen(method, js_class = "String", js_name = charAt)]
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pub fn char_at(this: &JsString, index: u32) -> JsString;
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/// The indexOf() method returns the index within the calling String object of
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/// the first occurrence of the specified value, starting the search at fromIndex.
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/// Returns -1 if the value is not found.
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///
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/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/indexOf
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#[wasm_bindgen(method, js_class = "String", js_name = indexOf)]
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pub fn index_of(this: &JsString, search_value: &JsString, from_index: i32) -> i32;
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/// The slice() method extracts a section of a string and returns it as a
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/// new string, without modifying the original string.
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///
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@ -355,6 +363,20 @@ extern {
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#[wasm_bindgen(method, js_class = "String")]
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pub fn slice(this: &JsString, start: u32, end: u32) -> JsString;
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/// The startsWith() method determines whether a string begins with the characters
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/// of a specified string, returning true or false as appropriate.
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///
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/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
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#[wasm_bindgen(method, js_class = "String", js_name = startsWith)]
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pub fn starts_with(this: &JsString, search_string: &JsString, position: u32) -> bool;
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/// The substring() method returns the part of the string between the start and end indexes,
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/// or to the end of the string.
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///
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/// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substring
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#[wasm_bindgen(method, js_class = "String")]
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pub fn substring(this: &JsString, index_start: u32, index_end: u32) -> JsString;
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/// The substr() method returns the part of a string between
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/// the start index and a number of characters after it.
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///
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111
tests/all/js_globals/JsString.rs
Executable file → Normal file
111
tests/all/js_globals/JsString.rs
Executable file → Normal file
@ -31,6 +31,115 @@ fn char_at() {
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.test()
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}
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#[test]
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fn starts_with() {
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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 string_starts_with(this: &js::JsString, search_string: &js::JsString, position: u32) -> bool {
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this.starts_with(search_string, position)
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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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let str = "To be, or not to be, that is the question.";
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// TODO: remove second parameter for both assertions once we have optional parameters
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assert.ok(wasm.string_starts_with(str, 'To be', 0));
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assert.ok(!wasm.string_starts_with(str, 'not to be', 0));
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assert.ok(wasm.string_starts_with(str, 'not to be', 10));
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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 substring() {
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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 string_substring(this: &js::JsString, index_start: u32, index_end: u32) -> js::JsString {
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this.substring(index_start, index_end)
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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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let anyString = "Mozilla";
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assert.equal(wasm.string_substring(anyString, 0, 1), 'M');
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assert.equal(wasm.string_substring(anyString, 1, 0), 'M');
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assert.equal(wasm.string_substring(anyString, 0, 6), 'Mozill');
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// TODO: Add test once we have optional parameters
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// assert.equal(wasm.string_substring(anyString, 4), 'lla');
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assert.equal(wasm.string_substring(anyString, 4, 7), 'lla');
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assert.equal(wasm.string_substring(anyString, 7, 4), 'lla');
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assert.equal(wasm.string_substring(anyString, 0, 7), 'Mozilla');
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assert.equal(wasm.string_substring(anyString, 0, 10), 'Mozilla');
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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 index_of() {
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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 string_index_of(this: &js::JsString, search_value: &js::JsString, from_index: i32) -> i32 {
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this.index_of(search_value, from_index)
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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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let str = "Blue Whale";
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// TODO: remove second parameter once we have optional parameters
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assert.equal(wasm.string_index_of(str, 'Blue', 0), 0);
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// TODO: remove second parameter once we have optional parameters
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assert.equal(wasm.string_index_of(str, 'Blute', 0), -1);
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assert.equal(wasm.string_index_of(str, 'Whale', 0), 5);
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assert.equal(wasm.string_index_of(str, 'Whale', 5), 5);
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assert.equal(wasm.string_index_of(str, 'Whale', 7), -1);
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// TODO: remove second parameter once we have optional parameters
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assert.equal(wasm.string_index_of(str, '', 0), 0);
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assert.equal(wasm.string_index_of(str, '', 9), 9);
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assert.equal(wasm.string_index_of(str, '', 10), 10);
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assert.equal(wasm.string_index_of(str, '', 11), 10);
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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 slice() {
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project()
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@ -94,4 +203,4 @@ fn substr() {
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}
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"#)
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.test()
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}
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}
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