Updated the test system

test/cloneRegExp.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const {cloneRegExp} = require('./_30s.js');
+
+test('cloneRegExp is a Function', () => {
+  expect(cloneRegExp).toBeInstanceOf(Function);
+});
+const rgTest = /./g;
+test('Clones regular expressions properly', () => {
+  expect(cloneRegExp(rgTest)).not.toBe(rgTest);
+});