add test, update tags, update description

test/formToObject.test.js

@@ -0,0 +1,18 @@
+const expect = require('expect');
+const {formToObject} = require('./_30s.js');
+
+test('formToObject is a Function', () => {
+  expect(formToObject).toBeInstanceOf(Function);
+});
+
+test('formToObject correctly converts to object', () => {
+  document.body.innerHTML = `
+    <form id="form">
+      <input name="name" value="Test Name" />
+      <input name="email" value="test@mail.com" />
+    </form>
+  `;
+
+  const form = document.querySelector('#form');
+  expect(formToObject(form)).toEqual({ name: 'Test Name', email: 'test@mail.com' });
+});