Add bindings for Intl.getCanonicalLocales

Author: matiasinsaurralde

src/js.rs

@@ -1628,3 +1628,17 @@ extern "C" {
     #[wasm_bindgen(static_method_of = Symbol, getter, structural, js_name = toStringTag)]
     pub fn to_string_tag() -> Symbol;
 }
+
+// Intl
+#[wasm_bindgen]
+extern "C" {
+    pub type Intl;
+
+    /// The `Intl.getCanonicalLocales()` method returns an array containing
+    /// the canonical locale names. Duplicates will be omitted and elements
+    /// will be validated as structurally valid language tags.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/getCanonicalLocales
+    #[wasm_bindgen(static_method_of = Intl, js_name = getCanonicalLocales)]
+    pub fn get_canonical_locales(s: &JsValue) -> Array;
+}

tests/all/js_globals/Intl.rs

@@ -0,0 +1,34 @@
+#![allow(non_snake_case)]
+
+use project;
+
+#[test]
+fn get_canonical_locales() {
+    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_canonical_locales(v: &JsValue) -> js::Array {
+                js::Intl::get_canonical_locales(v)
+            }
+        "#)
+        .file("test.js", r#"
+            import * as assert from "assert";
+            import * as wasm from "./out";
+
+            export function test() {
+                let locales = ["EN-US", "Fr"];
+                let canonical_locales = wasm.get_canonical_locales(locales);
+                assert.deepStrictEqual(canonical_locales, ["en-US", "fr"]);
+
+                let single_locale = wasm.get_canonical_locales("EN-US");
+                assert.equal(single_locale, "en-US");
+            }
+        "#)
+        .test()
+}

tests/all/js_globals/mod.rs

@@ -10,6 +10,7 @@ mod Date;
 mod Error;
 mod Function;
 mod Generator;
+mod Intl;
 mod JsString;
 mod Map;
 mod MapIterator;