Test migration to jest by hand

Apparently using regular expressions is way easier.

test/on/on.js

@@ -0,0 +1,6 @@
+const on = (el, evt, fn, opts = {}) => {
+const delegatorFn = e => e.target.matches(opts.target) && fn.call(e.target, e);
+el.addEventListener(evt, opts.target ? delegatorFn : fn, opts.options || false);
+if (opts.target) return delegatorFn;
+};
+module.exports = on;

test/on/on.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const on = require('./on.js');
+
+
+  test('on is a Function', () => {
+  expect(on).toBeInstanceOf(Function);
+});
+  t.pass('Tested by @chalarangelo on 16/02/2018');
+  
+