typeOf.js

export default
function typeOf (obj) {
  return Object.prototype.toString.call(obj).slice(8, -1);
}

// Unit tests

it('for Array', () => {
  expect(typeOf([])).toBe('Array');
});

it('for Object', () => {
  expect(typeOf({})).toBe('Object');
});

it('for Undefined', () => {
  expect(typeOf(undefined)).toBe('Undefined');
});

it('for Null', () => {
  expect(typeOf(null)).toBe('Null');
});

it('for RegExp', () => {
  expect(typeOf(/asf/)).toBe('RegExp');
});

it('for Function', () => {
  expect(typeOf(() => {})).toBe('Function');
});