if not Object.is?
    Object.defineProperty(
        Object
        'is'
        {}
            value: (a, b) ->
                if a is b
                    if a is 0
                        return 1 / a is 1 / b
                    return true
                return a isnt a and b isnt b
    )

#   compatible with Sugar extensions, remove later when we refactor away our custom Array add method.
Object.isEmpty = (object) ->
    if not object?
        return true
    if typeof object is 'string'
        return object.trim().length is 0
    if Array.isArray(object)
        return object.length is 0
    if object.constructor is Object
        for key of object
            return false
        return true
    return false

export const test = ->
    assert Object.isEmpty(null)
    assert Object.isEmpty()
    assert Object.isEmpty(undefined)
    assert Object.isEmpty([])
    assert Object.isEmpty({})
    assert Object.isEmpty("")
    assert Object.isEmpty(" ")
    assert not Object.isEmpty([1])
    assert not Object.isEmpty({x:1})
    assert not Object.isEmpty("h")
    assert not Object.isEmpty(true)
    assert not Object.isEmpty(false)
    assert not Object.isEmpty(45)
    assert not Object.isEmpty(new Date())