Watir webdriver 没有按预期工作

Question

我尝试执行一个简单的浏览器测试

require 'rubygems'
require 'watir-webdriver'
b = Watir::Browser.new :firefox
b.goto 'http://www.google.com/'

浏览器启动并立即关闭并抛出以下错误

c:/ruby22/lib/ruby/2.2.0/net/http/generic_request.rb:25:in `initialize': HTTP request path is empty (ArgumentError)
    from c:/ruby22/lib/ruby/2.2.0/net/http/request.rb:14:in `initialize'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/default.rb:95:in `new'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/default.rb:95:in `new_request_for'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/default.rb:57:in `request'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/default.rb:88:in `request'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/common.rb:59:in `call'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/bridge.rb:649:in `raw_execute'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/bridge.rb:123:in `create_session'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/bridge.rb:87:in `initialize'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/firefox/bridge.rb:55:in `initialize'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/common/driver.rb:53:in `new'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/common/driver.rb:53:in `for'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver.rb:84:in `for'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/watir-webdriver-0.9.1/lib/watir-webdriver/browser.rb:46:in `initialize'
    from test.rb:3:in `new'
    from test.rb:3:in `<main>'

HTTP请求路径为空是什么意思？新版本的watir调用参数有变化吗？

有人遇到过类似的问题吗？

我的系统是 Windows 7 64 位，我在代理后面运行，浏览器已经配置了代理

---编辑---

我已经引入了一个斜杠，但我现在收到一个新错误，并且每次我必须更改代码并保存它以获得此错误时，我都会收到以前的错误

c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/firefox/launcher.rb:90:in `connect_until_stable': unable to obtain stable firefox connection in 60 seconds (127.0.0.1:7055) (Selenium::WebDriver::Error::WebDriverError)
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/firefox/launcher.rb:55:in `block in launch'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/common/socket_lock.rb:43:in `locked'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/firefox/launcher.rb:51:in `launch'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/firefox/bridge.rb:43:in `initialize'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/common/driver.rb:53:in `new'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/common/driver.rb:53:in `for'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver.rb:84:in `for'
    from c:/ruby22/lib/ruby/gems/2.2.0/gems/watir-webdriver-0.9.1/lib/watir-webdriver/browser.rb:46:in `initialize'
    from test.rb:8:in `new'
    from test.rb:8:in `<main>'

---编辑---

我已经从https://github.com/mozilla/geckodriver/releases 下载了geckodriver v0.10.0 并将geckodriver.exe 复制粘贴到firefox 文件夹中，并将firefox 文件夹添加到PATH

我安装了selenium-webdriver测试版3.0.0.beta2.1

但我仍然遇到同样的错误

c:/ruby22/lib/ruby/2.2.0/net/http/generic_request.rb:25:in `initialize': HTTP request path is empty (ArgumentError)

我也尝试安装 Firefox ESR 版本并添加到 PATH 中，但也无法正常工作

---编辑---

我打开了文件 c:/ruby22/lib/ruby/2.2.0/net/http/generic_request.rb

并引入print语句如下

print "\n"
print uri_or_path

if URI === uri_or_path then
  print "\ncoming to if part\n"
  @uri = uri_or_path.dup
  host = @uri.hostname.dup
  host << ":".freeze << @uri.port.to_s if @uri.port != @uri.default_port
  @path = uri_or_path.request_uri
  raise ArgumentError, "no HTTP request path given" unless @path
else
  print "\ncoming to else part\n"
  @uri = nil
  host = nil
  raise ArgumentError, "no HTTP request path given" unless uri_or_path
  raise ArgumentError, "HTTP request path is empty" if uri_or_path.empty?
  @path = uri_or_path.dup
end

我得到了以下输出

/session
coming to else part


coming to else part

/shutdown
coming to else part
c:/ruby22/lib/ruby/2.2.0/net/http/generic_request.rb:29:in `initialize': HTTP request path is empty (ArgumentError)

Answer 1

尝试在 IRB 中输入这些命令，一次一行。这将使故障发生的位置更清楚

您的初始错误表明它在第 3 行失败，在上面的代码中，它尝试创建浏览器对象的新实例（它也启动 Firefox，然后尝试将浏览器对象连接到实际浏览器）。如果这不起作用，通常是因为您没有使用支持浏览器的 webdriver 版本。也许你有一个全新的 Firefox，并且需要更新 webdriver。

有时在新的 FF 推出后（每 6 周）会有一个短暂的窗口，引入了重大更改，我们没有更新的 webdriver gem 支持该版本。

Answer 2

您很可能是由于 Firefox 47.0 中的一个错误而看到的。您需要更新到 Firefox 47.0.1 才能使用 Selenium 2.53.4。