Migrated tests to jest

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

test2/functions/functions.js

@@ -0,0 +1,6 @@
+const functions = (obj, inherited = false) =>
+(inherited
+? [...Object.keys(obj), ...Object.keys(Object.getPrototypeOf(obj))]
+: Object.keys(obj)
+).filter(key => typeof obj[key] === 'function');
+module.exports = functions;

test2/functions/functions.test.js

@@ -0,0 +1,15 @@
+const expect = require('expect');
+const functions = require('./functions.js');
+
+test('Testing functions', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof functions === 'function').toBeTruthy();
+  function Foo() {
+    this.a = () => 1;
+    this.b = () => 2;
+  }
+  Foo.prototype.c = () => 3;
+  expect(functions(new Foo())).toEqual(['a', 'b']);
+  expect(functions(new Foo(), true)).toEqual(['a', 'b', 'c']);
+});