add test when data to parse is equal to null

test/unit/dash.DashParser.js

@@ -1,14 +1,38 @@
 import DashParser from '../../src/dash/parser/DashParser';
 
+import ErrorHandlerMock from './mocks/ErrorHandlerMock';
 const expect = require('chai').expect;
 
 const context = {};
-const dashParser = DashParser(context).create({});
+let dashParser = DashParser(context).create({});
 
 describe('DashParser', function () {
 
+	beforeEach(function () {
+        if (typeof window === 'undefined') {
+            global.window = {
+                performance: {
+                    now: function () {
+                        return Date.now();
+                    }
+                }
+            };
+        }
+    });
+
+    afterEach(function () {
+        delete global.window;
+    });
+
 	it('should throw an error when parse is called and config object has not been set properly', function () {
         expect(dashParser.parse.bind('')).to.be.throw('Missing config parameter(s)');
     });
 
+	it('should throw an error when parse is called without data and config object has been set properly', function () {
+		let errorHandlerMock = new ErrorHandlerMock();
+		dashParser = DashParser(context).create({errorHandler: errorHandlerMock});
+		dashParser.parse();
+		expect(errorHandlerMock.error).to.equal('parsing the manifest failed');
+    });
+
 });