Test and fixup centerEase

js/id/renderer/map.js

@@ -273,6 +273,7 @@ iD.Map = function() {
             map.center(iD.geo.interp(from, loc, (t += 1) / 10));
             return t == 10;
         }, 20);
+        return map;
     };
 
     map.extent = function(_) {

test/spec/renderer/map.js

@@ -42,6 +42,12 @@ describe('iD.Map', function() {
         });
     });
 
+    describe('#minzoom', function() {
+        it('is zero by default', function() {
+            expect(map.minzoom()).to.equal(0);
+        });
+    });
+
     describe('#center', function() {
         it('gets and sets center', function() {
             expect(map.center([0, 0])).to.equal(map);
@@ -52,6 +58,18 @@ describe('iD.Map', function() {
         });
     });
 
+    describe('#centerEase', function() {
+        it('sets center', function(done) {
+            expect(map.center([10, 10])).to.equal(map);
+            expect(map.centerEase([20, 20])).to.equal(map);
+            window.setTimeout(function() {
+                expect(map.center()[0]).to.be.closeTo(20, 0.5);
+                expect(map.center()[1]).to.be.closeTo(20, 0.5);
+                done();
+            }, 500);
+        });
+    });
+
     describe('#centerZoom', function() {
         it('gets and sets center and zoom', function() {
             expect(map.centerZoom([20, 25], 4)).to.equal(map);