Migrated tests to jest

Used jest-codemods to migrate, will have to pass everything by hand before we can merge.

test6/URLJoin/URLJoin.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const URLJoin = require('./URLJoin.js');
+
+test('Testing URLJoin', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof URLJoin === 'function').toBeTruthy();
+  expect(URLJoin('http://www.google.com', 'a', '/b/cd', '?foo=123', '?bar=foo')).toBe('http://www.google.com/a/b/cd?foo=123&bar=foo');
+  expect(URLJoin('file://www.google.com', 'a', '/b/cd', '?foo=123', '?bar=foo')).toBe('file:///www.google.com/a/b/cd?foo=123&bar=foo');
+});