Test migration to jest by hand

Apparently using regular expressions is way easier.

test/isRegExp/isRegExp.js

@@ -0,0 +1,2 @@
+const isRegExp = val => val instanceof RegExp;
+ module.exports = isRegExp;

test/isRegExp/isRegExp.test.js

@@ -0,0 +1,8 @@
+const expect = require('expect');
+const isRegExp = require('./isRegExp.js');
+
+
+  test('isRegExp is a Function', () => {
+  expect(isRegExp).toBeInstanceOf(Function);
+});
+