From aca3363e3c4a43fdbc1e398a721b0d1b4d807b46 Mon Sep 17 00:00:00 2001
From: Evan Morikawa <evan@evanmorikawa.com>
Date: Mon, 19 Sep 2016 20:13:23 -0400
Subject: [PATCH] fix(util): Utils.deepClone properly clones dates

---
 spec/utils-spec.coffee       | 5 +++++
 src/flux/models/utils.coffee | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/spec/utils-spec.coffee b/spec/utils-spec.coffee
index 57b49b006..b4b9db216 100644
--- a/spec/utils-spec.coffee
+++ b/spec/utils-spec.coffee
@@ -76,6 +76,11 @@ describe 'Utils', ->
       @o2.circular = @o2
       @o2Clone = Utils.deepClone(@o2)
 
+    it "deep clones dates correctly", ->
+      d1 = new Date(2016,1,1)
+      d2 = Utils.deepClone(d1)
+      expect(d2.valueOf()).toBe(d1.valueOf())
+
     it "makes a deep clone", ->
       @v1.push(4)
       @v2.push(7)
diff --git a/src/flux/models/utils.coffee b/src/flux/models/utils.coffee
index 33e51bb6e..fbb27136a 100644
--- a/src/flux/models/utils.coffee
+++ b/src/flux/models/utils.coffee
@@ -81,6 +81,10 @@ Utils =
     if _.isArray(object)
       # http://perfectionkills.com/how-ecmascript-5-still-does-not-allow-to-subclass-an-array/
       newObject = []
+    else if object instanceof Date
+      # You can't clone dates by iterating through `getOwnPropertyNames`
+      # of the Date object. We need to special-case Dates.
+      newObject = new Date(object)
     else
       newObject = Object.create(Object.getPrototypeOf(object))