Test migration to jest by hand

Apparently using regular expressions is way easier.

test/onUserInputChange/onUserInputChange.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const onUserInputChange = require('./onUserInputChange.js');
+
+
+  test('onUserInputChange is a Function', () => {
+  expect(onUserInputChange).toBeInstanceOf(Function);
+});
+  t.pass('Tested by @chalarangelo on 16/02/2018');
+  
+