Clean code. Improve tests

index.js

 
 import dataFormatter from 'excel-style-dataformatter';
 
-// Default Excel value
-const decimalPlaces = 2;
-const locale = 'ru-RU';
-
 export default function format(v, type='', str=''){
     if(type === '' && str === ''){
         return basicFormat(v);

test/test_format.js

@@ -30,4 +30,18 @@ describe('format', ()=>{
         expect(format(1.1234, 'Number', str)).to.be('1,12р.');
         expect(format(1.1289, 'Number', str)).to.be('1,13р.');
     });
+
+    it('should do date formatting', ()=>{
+        let d = new Date(2016, 0, 1, 0, 0, 0, 0);
+
+        expect(format(d, 'DateTime', 'yyyy-mm-dd')).to.be('2016-01-01');
+
+        d = new Date(2016, 0, 1, 1, 0, 0, 0);
+
+        expect(format(d, 'DateTime', 'hh:mm')).to.be('01:00');
+
+        d = new Date(2016, 0, 1, 1, 59, 0, 0);
+
+        expect(format(d, 'DateTime', 'hh:mm')).to.be('01:59');
+    });
 });