如何使用Watir :: Waiter :: wait_until强制Chrome等待？

Question

我试图告诉我的watir脚本等待ajax注入的登录框打开.我正在使用watir-webdriver,并在Chrome中进行测试.我无法开始wait_until工作,如下面(简化)脚本中所评论的那样.

require "rubygems"
require "watir-webdriver"
b = Watir::Browser.new(:chrome)
site = "www.example.com"
b.goto site

puts "Click on Sign In button"
b.link(:id, 'btnLogin').click

puts "Waiting for the username/password dialog to show up"

# Below line does *not* work
# Throws this error: "uninitialized constant Watir::Waiter (NameError)" 
Watir::Waiter::wait_until { b.text_field(:id, 'username').exists? }

# Below line does *not* work
# Throws this error: "undefined method `wait_until' for main:Object (NoMethodError)" 
wait_until { b.text_field(:id, 'username').exists? }

# Below line *does* work, but I don't want to use it.
sleep 1 until b.text_field(:id, 'username').exists?

是Watir::WaiterIE专用课吗？或者我做错了什么,sleep 1等待方法运行得很好.我是Ruby和watir的新手,我昨天刚刚接受了这个,所以我有一半期待这是我不忠的结果.

如果它是相关的,我正在使用mac(OSX v.10.6.5).

Answer 1

首先这样做:

require "watir-webdriver/wait"

然后试试这些:

1

Watir::Wait.until { ... }

2

browser.text_field(:id => 'username').when_present.set("name")

3

browser.text_field(:id => 'username').wait_until_present

请注意,"present"在这里表示"元素既存在又可见".