Migrated tests to jest

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

test5/rearg/rearg.js

@@ -0,0 +1,8 @@
+const rearg = (fn, indexes) => (...args) =>
+fn(
+...args.reduce(
+(acc, val, i) => ((acc[indexes.indexOf(i)] = val), acc),
+Array.from({ length: indexes.length })
+)
+);
+module.exports = rearg;

test5/rearg/rearg.test.js

@@ -0,0 +1,15 @@
+const expect = require('expect');
+const rearg = require('./rearg.js');
+
+test('Testing rearg', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof rearg === 'function').toBeTruthy();
+  var rearged = rearg(
+    function(a, b, c) {
+      return [a, b, c];
+    },
+    [2, 0, 1]
+  );
+  expect(rearged('b', 'c', 'a')).toEqual(['a', 'b', 'c']);
+});