Test migration to jest by hand

Apparently using regular expressions is way easier.

test/detectDeviceType/detectDeviceType.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const detectDeviceType = require('./detectDeviceType.js');
+
+
+  test('detectDeviceType is a Function', () => {
+  expect(detectDeviceType).toBeInstanceOf(Function);
+});
+  t.pass('Tested on 09/02/2018 by @chalarangelo');
+  
+