在 x 平台葫芦上启动 iOS 自动启动时出错答案

【问题标题】：Error starting autostart for iOS on x-platform calabash在 x 平台葫芦上启动 iOS 自动启动时出错
【发布时间】：2017-10-05 09:16:37
【问题描述】：

当我运行测试时，我在控制台中写入以下错误：

undefined method `split' for nil:NilClass (NoMethodError)
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/run_loop 1.2.6/lib/run_loop/sim_control.rb:866:in `block in sim_details'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/run_loop-1.2.6/lib/run_loop/sim_control.rb:863:in `each'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/run_loop-1.2.6/lib/run_loop/sim_control.rb:863:in `sim_details'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/run_loop-1.2.6/lib/run_loop/sim_control.rb:290:in `enable_accessibility_on_sims'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/run_loop-1.2.6/lib/run_loop/core.rb:214:in `run_with_options'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/run_loop-1.2.6/lib/run_loop/core.rb:792:in `run'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/calabash-cucumber-0.12.2/lib/calabash-cucumber/launcher.rb:755:in `block in new_run_loop'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/calabash-cucumber-0.12.2/lib/calabash-cucumber/launcher.rb:753:in `times'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/calabash-cucumber-0.12.2/lib/calabash-cucumber/launcher.rb:753:in `new_run_loop'
  /Users/denis/.rvm/gems/ruby-2.1.1/gems/calabash-cucumber-0.12.2/lib/calabash-cucumber/launcher.rb:624:in `relaunch'
  /Users/denis/Documents/calabash-test-ios/x-platform-example/features/ios/support/01_launch.rb:27:in `Before'

测试本身是来自这里的example。以下是其中一个错误的代码：

def sim_details(primary_key)
  unless xcode_version_gte_6?
    raise RuntimeError, 'this method is only available on Xcode >= 6'
  end

  allowed = [:udid, :launch_name]
  unless allowed.include? primary_key
    raise ArgumentError, "expected '#{primary_key}' to be one of '#{allowed}'"
  end

  hash = {}
  xctools.instruments(:sims).each do |elm|
    launch_name = elm[/\A.+\((\d\.\d(\.\d)? Simulator\))/, 0]
    udid = elm[XCODE_6_SIM_UDID_REGEX,0]
    sdk_version = elm[/(\d\.\d(\.\d)? Simulator)/, 0].split(' ').first
    value =
          {
                :launch_name => launch_name,
                :udid => udid,
                :sdk_version => RunLoop::Version.new(sdk_version)
          }
    if primary_key == :udid
      key = udid
    else
      key = launch_name
    end
    hash[key] = value
  end
  hash
end

运行这个命令：bundle exec cucumber -p ios DEVICE_TARGET="6D45E1...6513"

有人能遇到吗？

【问题讨论】：

您能否在导致上述错误的行周围包含代码？
@ChuckvanderLinden 代码已添加

标签： ios ruby automated-tests cucumber

【解决方案1】：

DEVICE_TARGET UUID 是否确实存在于可用模拟器列表中？ instruments -s 将向您展示设备。切换 Xcode 版本而不重启或重启 CoreSimulator 服务可能会导致找不到模拟器。

【讨论】：

DEVICE_TARGET UUID其实是

【解决方案2】：

看起来这段代码sdk_version = elm[/(\d\.\d(\.\d)? Simulator)/, 0] 没有返回任何内容。您似乎希望它返回一个字符串。我会在那个区域进行调试。

错误告诉您，您的选择导致 nil 对象当然没有类，因此也没有 .split 方法。因此，尝试调用 .split 方法会给您一个错误，即您所拥有的东西没有定义 .split 方法。

【讨论】：