From c6200931e16810fa38a3b8a623e06c23ab92ee96 Mon Sep 17 00:00:00 2001
From: Ansis Brammanis <ansis.brammanis@gmail.com>
Date: Thu, 18 Apr 2013 17:02:19 -0400
Subject: [PATCH] update tests for iD.Difference fix

---
 test/spec/core/difference.js | 13 +++++++++++--
 test/spec/core/history.js    |  2 +-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/test/spec/core/difference.js b/test/spec/core/difference.js
index c9647bbea..5fb006224 100644
--- a/test/spec/core/difference.js
+++ b/test/spec/core/difference.js
@@ -18,7 +18,7 @@ describe("iD.Difference", function () {
 
         it("includes modified entities", function () {
             var n1 = iD.Node({id: 'n'}),
-                n2 = n1.update(),
+                n2 = n1.update({ tags: { yes: 'no' } }),
                 base = iD.Graph([n1]),
                 head = base.replace(n2),
                 diff = iD.Difference(base, head);
@@ -27,13 +27,22 @@ describe("iD.Difference", function () {
 
         it("includes undone modified entities", function () {
             var n1 = iD.Node({id: 'n'}),
-                n2 = n1.update(),
+                n2 = n1.update({ tags: { yes: 'no' } }),
                 base = iD.Graph([n1]),
                 head = base.replace(n2),
                 diff = iD.Difference(head, base);
             expect(diff.changes()).to.eql({n: {base: n2, head: n1}});
         });
 
+        it("doesn't include updated but identical entities", function () {
+            var n1 = iD.Node({id: 'n'}),
+                n2 = n1.update(),
+                base = iD.Graph([n1]),
+                head = base.replace(n2),
+                diff = iD.Difference(base, head);
+            expect(diff.changes()).to.eql({});
+        });
+
         it("includes deleted entities", function () {
             var node = iD.Node({id: 'n'}),
                 base = iD.Graph([node]),
diff --git a/test/spec/core/history.js b/test/spec/core/history.js
index ae1acb933..8c82fa92b 100644
--- a/test/spec/core/history.js
+++ b/test/spec/core/history.js
@@ -184,7 +184,7 @@ describe("iD.History", function () {
 
         it("includes modified entities", function () {
             var node1 = iD.Node({id: "n1"}),
-                node2 = node1.update({});
+                node2 = node1.update({ tags: { yes: "no" } });
             history.merge({ n1: node1});
             history.perform(function (graph) { return graph.replace(node2); });
             expect(history.changes().modified).to.eql([node2]);