From 12e817e408ce2d227e3c0f3969a1bf3a6d26d467 Mon Sep 17 00:00:00 2001
From: nd0ut <nd0ut.me@gmail.com>
Date: Fri, 17 Apr 2015 14:36:37 +0300
Subject: [PATCH] Check projections equivalence also by their code

Method ol.proj.equivalent used only reference equality check ===
That doesn't work for basic checks of two strongly equal projections
For example, `EPSG:4326` and `EPSG:4326`
In this case method searches similar proj in ol.proj.transforms_ mapping
And it finds it if proj is default and not custom
But in case of custom proj `EPSG:3413` it doesn't find it
---
 src/ol/proj/proj.js            |  2 ++
 test/spec/ol/proj/proj.test.js | 21 +++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/src/ol/proj/proj.js b/src/ol/proj/proj.js
index d8a13e17b9..f69f02483c 100644
--- a/src/ol/proj/proj.js
+++ b/src/ol/proj/proj.js
@@ -656,6 +656,8 @@ ol.proj.get = function(projectionLike) {
 ol.proj.equivalent = function(projection1, projection2) {
   if (projection1 === projection2) {
     return true;
+  } else if (projection1.getCode() === projection2.getCode()) {
+    return true;
   } else if (projection1.getUnits() != projection2.getUnits()) {
     return false;
   } else {
diff --git a/test/spec/ol/proj/proj.test.js b/test/spec/ol/proj/proj.test.js
index df97107a21..1714236b0d 100644
--- a/test/spec/ol/proj/proj.test.js
+++ b/test/spec/ol/proj/proj.test.js
@@ -30,6 +30,27 @@ describe('ol.proj', function() {
       ]);
     });
 
+    it('gives that custom 3413 is equivalent to self', function() {
+      var code = 'EPSG:3413';
+
+      var source = new ol.proj.Projection({
+        code: code
+      });
+
+      var destination = new ol.proj.Projection({
+        code: code
+      });
+
+      expect(ol.proj.equivalent(source, destination)).to.be.ok();
+    });
+
+    it('gives that default 3857 is equivalent to self', function() {
+      _testAllEquivalent([
+        'EPSG:3857',
+        'EPSG:3857'
+      ]);
+    });
+
     it('gives that CRS:84, urn:ogc:def:crs:EPSG:6.6:4326, EPSG:4326 are ' +
        'equivalent', function() {
           _testAllEquivalent([