Test migration to jest by hand

Apparently using regular expressions is way easier.

test/size/size.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const size = require('./size.js');
+
+
+  test('size is a Function', () => {
+  expect(size).toBeInstanceOf(Function);
+});
+  t.equal(size([1, 2, 3, 4, 5]), 5, "Get size of arrays, objects or strings.");
+  t.equal(size({ one: 1, two: 2, three: 3 }), 3, "Get size of arrays, objects or strings.");
+