From d155136f0eddf747b48b8218c48f62237fad0c55 Mon Sep 17 00:00:00 2001
From: Matt Long <matthewhl@gmail.com>
Date: Wed, 20 Jun 2018 17:49:34 -0400
Subject: [PATCH] add binding for fill

---
 src/js.rs                     |  7 +++++++
 tests/all/js_globals/Array.rs | 30 ++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/src/js.rs b/src/js.rs
index e3b0f217..fc614e4c 100644
--- a/src/js.rs
+++ b/src/js.rs
@@ -126,4 +126,11 @@ extern {
     /// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
     #[wasm_bindgen(method)]
     pub fn slice(this: &Array, start: u32, end: u32) -> Array;
+
+    /// The fill() method fills all the elements of an array from a start index to an end index with a static value.
+    /// The end index is not included.
+    ///
+    /// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fill
+    #[wasm_bindgen(method)]
+    pub fn fill(this: &Array, value: JsValue, start: u32, end: u32) -> Array;
 }
\ No newline at end of file
diff --git a/tests/all/js_globals/Array.rs b/tests/all/js_globals/Array.rs
index 8e89f3e8..f83f56e2 100644
--- a/tests/all/js_globals/Array.rs
+++ b/tests/all/js_globals/Array.rs
@@ -138,4 +138,34 @@ fn slice() {
             }
         "#)
         .test()
+}
+
+#[test]
+fn fill() {
+    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 fill_with(this: &js::Array, value: JsValue, start: u32, end: u32) -> js::Array {
+                this.fill(value, start, end)
+            }
+        "#)
+        .file("test.ts", r#"
+            import * as assert from "assert";
+            import * as wasm from "./out";
+
+            export function test() {
+                let characters = ["a", "c", "x", "n", 1, "8"];
+                let subset = wasm.fill_with(characters, 0, 0, 3);
+
+                assert.equal(subset[0], 0);
+                assert.equal(subset[4], 1);
+            }
+        "#)
+        .test()
 }
\ No newline at end of file