var expect = require('expect')
var utils = require('../lib/utils')

var noop = utils.noop
var assign = utils.assign

describe('utils', function () {
  it('→ exists', function () {
    expect(utils).toExist()
  })

  describe('→ noop', function () {
    it('→ is a function', function () {
      expect(noop).toBeA(Function)
    })
  })

  describe('→ assign', function () {
    it('→ adds properties to dest', function () {
      var dest = {}
      var src = {foo: 123, bar: 'asdf'}
      assign(dest, src)
      expect(dest).toEqual({foo: 123, bar: 'asdf'})
    })

    it('→ overrides properties to dest', function () {
      var dest = {foo: 456, bar: 'qwerty', blah: /foo/}
      var src = {foo: 123, bar: 'asdf'}
      assign(dest, src)
      expect(dest).toEqual({foo: 123, bar: 'asdf', blah: /foo/})
    })

    it('→ does not overrides properties on prototype', function () {
      function SourceClass (foo) {
        this.foo = foo
      }
      SourceClass.prototype.bar = 'asdf'

      var dest = {foo: 456, bar: 'qwerty', blah: /foo/}
      assign(dest, new SourceClass(123))

      expect(dest).toEqual({foo: 123, bar: 'qwerty', blah: /foo/})
    })
  })
})