From f7b511588b24aa0312a49ecbebe8d0f4be2f42d6 Mon Sep 17 00:00:00 2001
From: Michael Hoffmann <brennan.brisad@gmail.com>
Date: Wed, 19 Sep 2018 21:32:05 +0200
Subject: [PATCH] Add binding for Object.entries()

---
 crates/js-sys/src/lib.rs           | 10 ++++++++++
 crates/js-sys/tests/wasm/Object.rs | 13 +++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/crates/js-sys/src/lib.rs b/crates/js-sys/src/lib.rs
index 08531aa4..b09f582d 100644
--- a/crates/js-sys/src/lib.rs
+++ b/crates/js-sys/src/lib.rs
@@ -2014,6 +2014,16 @@ extern "C" {
     #[wasm_bindgen(static_method_of = Object, js_name = defineProperties)]
     pub fn define_properties(obj: &Object, props: &Object) -> Object;
 
+    /// The Object.entries() method returns an array of a given
+    /// object's own enumerable property [key, value] pairs, in the
+    /// same order as that provided by a for...in loop (the difference
+    /// being that a for-in loop enumerates properties in the
+    /// prototype chain as well).
+    ///
+    /// [MDN documentation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries)
+    #[wasm_bindgen(static_method_of = Object)]
+    pub fn entries(object: &Object) -> Array;
+
     /// The `Object.freeze()` method freezes an object: that is, prevents new
     /// properties from being added to it; prevents existing properties from
     /// being removed; and prevents existing properties, or their enumerability,
diff --git a/crates/js-sys/tests/wasm/Object.rs b/crates/js-sys/tests/wasm/Object.rs
index ccd37a9a..52e6fa50 100644
--- a/crates/js-sys/tests/wasm/Object.rs
+++ b/crates/js-sys/tests/wasm/Object.rs
@@ -110,6 +110,19 @@ fn define_properties() {
     assert!(foo.has_own_property(&"car".into()));
 }
 
+#[wasm_bindgen_test]
+fn entries() {
+    let entries = Object::entries(&foo_42());
+    assert_eq!(entries.length(), 1);
+    entries.for_each(&mut |x, _, _| {
+        assert!(x.is_object());
+        let array: Array = x.into();
+        assert_eq!(array.shift(), "foo");
+        assert_eq!(array.shift(), 42);
+        assert_eq!(array.length(), 0);
+    });
+}
+
 #[wasm_bindgen_test]
 fn get_own_property_descriptor() {
     let foo = foo_42();