From 87671bb3e9a3f218895dd845fe4375a18455532b Mon Sep 17 00:00:00 2001
From: Tom MacWright <tom@macwright.org>
Date: Mon, 7 Jan 2013 17:37:07 -0500
Subject: [PATCH] Test for boundary condition

---
 test/spec/renderer/background.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/spec/renderer/background.js b/test/spec/renderer/background.js
index 5c97da1d8..0d7b0de10 100644
--- a/test/spec/renderer/background.js
+++ b/test/spec/renderer/background.js
@@ -34,6 +34,10 @@ describe('Background', function() {
     });
 
     describe('iD.BackgroundSource.Template', function() {
+        it('does not error with blank template', function() {
+            var source = iD.BackgroundSource.template('');
+            expect(source([0,1,2])).to.equal('');
+        });
         it('generates a tile-generating source', function() {
             var source = iD.BackgroundSource.template('{z}/{x}/{y}');
             expect(source([0,1,2])).to.equal('2/0/1');