Test migration to jest by hand

Apparently using regular expressions is way easier.

test/mapValues/mapValues.test.js

@@ -0,0 +1,14 @@
+const expect = require('expect');
+const mapValues = require('./mapValues.js');
+
+
+  test('mapValues is a Function', () => {
+  expect(mapValues).toBeInstanceOf(Function);
+});
+  const users = {
+    fred: { user: 'fred', age: 40 },
+    pebbles: { user: 'pebbles', age: 1 }
+  };
+  t.deepEqual(mapValues(users, u => u.age), { fred: 40, pebbles: 1 }, 'Maps values');
+  
+