Test migration to jest by hand

Apparently using regular expressions is way easier.

test/functions/functions.test.js

@@ -0,0 +1,16 @@
+const expect = require('expect');
+const functions = require('./functions.js');
+
+
+  test('functions is a Function', () => {
+  expect(functions).toBeInstanceOf(Function);
+});
+  function Foo() {
+    this.a = () => 1;
+    this.b = () => 2;
+  }
+  Foo.prototype.c = () => 3;
+  t.deepEqual(functions(new Foo()), ['a', 'b'], 'Returns own methods');
+  t.deepEqual(functions(new Foo(), true), ['a', 'b', 'c'], 'Returns own and inherited methods');
+  
+