add binding for pop

src/js.rs

@@ -139,4 +139,10 @@ extern {
     /// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/copyWithin
     #[wasm_bindgen(method, js_name = copyWithin)]
     pub fn copy_within(this: &Array, target: i32, start: i32, end: i32) -> Array;
+
+    /// The pop() method removes the last element from an array and returns that element. This method changes the length of the array.
+    ///
+    /// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/pop
+    #[wasm_bindgen(method)]
+    pub fn pop(this: &Array) -> JsValue;
 }

tests/all/js_globals/Array.rs

@@ -203,3 +203,33 @@ fn copy_within() {
         "#)
         .test()
 }
+
+#[test]
+fn pop() {
+    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 pop_in_it(this: &js::Array) -> JsValue {
+                this.pop()
+            }
+
+        "#)
+        .file("test.ts", r#"
+            import * as assert from "assert";
+            import * as wasm from "./out";
+
+            export function test() {
+                let characters = [8, 5, 4, 3, 1, 2]
+                let item = wasm.pop_in_it(characters);
+                assert.equal(item, 2);
+                assert.equal(characters.length, 5);
+            }
+        "#)
+        .test()
+}