Updated the test system

test/unflattenObject.test.js

@@ -0,0 +1,9 @@
+const expect = require('expect');
+const {unflattenObject} = require('./_30s.js');
+
+test('unflattenObject is a Function', () => {
+  expect(unflattenObject).toBeInstanceOf(Function);
+});
+test('Unflattens an object with the paths for keys', () => {
+  expect(unflattenObject({ 'a.b.c': 1, d: 1 })).toEqual({ a: { b: { c: 1 } }, d: 1 });
+});