使用试运行选项运行黄瓜时出错

我试图通过仅打开和关闭浏览器一次来提高运行测试的速度。

http://watirmelon.com/2012/04/01/ Five-page-object-anti-patterns/ http://watirmelon.com/2012/04/01/five-page-object-anti-patterns/

我在 hooks.rb 中有以下内容

browser = Watir::Browser.new ENV['BROWSER'].to_sym

Before do
  @browser = browser
end

After do |scenario|
  @browser.cookies.clear
end

at_exit do
  browser.close
end

它极大地提高了测试套件的运行速度。但我还需要来自自定义格式化程序的 json 文件中的一些统计信息，而无需运行测试：

cucumber -t @test -d -f Cucumber::Formatter::MyCustomFormatter > result.json

问题是黄瓜捕获错误-d option:

uninitialized constant Watir (NameError)
/home/user/work/repository/features/support/hooks.rb:7:in `<top (required)>'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/rb_support/rb_language.rb:122:in `load'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/rb_support/rb_language.rb:122:in `load_code_file'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/runtime/support_code.rb:180:in `load_file'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/runtime/support_code.rb:83:in `block in load_files!'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/runtime/support_code.rb:82:in `each'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/runtime/support_code.rb:82:in `load_files!'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/runtime.rb:183:in `load_step_definitions'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/runtime.rb:42:in `run!'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/lib/cucumber/cli/main.rb:47:in `execute!'
/home/user/.rvm/gems/ruby-2.0.0-p247/gems/cucumber-1.3.5/bin/cucumber:13:in `<top (required)>'
/home/user/.rvm/gems/ruby-2.0.0-p247/bin/cucumber:23:in `load'
/home/user/.rvm/gems/ruby-2.0.0-p247/bin/cucumber:23:in `<main>'
/home/user/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `eval'
/home/user/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `<main>'

然后我尝试移动Watir.new里面的方法Before block:

Before do
  if !$somevar
    browser = Watir::Browser.new ENV['BROWSER'].to_sym
    @browser = browser
    $somevar = true
  end
end

并得到错误at_exit block:

/home/user/work/repository/features/support/hooks.rb:26:in `block in <top (required)>': undefined local variable or method `browser' for main:Object (NameError)

如果我把@browser.close inside at_exit, I get:

/home/user/work/repository/features/support/hooks.rb:26:in `block in <top (required)>': undefined method `close' for nil:NilClass (NoMethodError)

有什么方法可以在测试套件中打开/关闭浏览器并使其与-d黄瓜的选择？

问题是试运行 (-d) 不会加载您的 support/env.rb 文件。如果你这样做cucumber -h查看帮助，它说：

-d, --dry-run 调用格式化程序而不执行步骤。这也会忽略 support/env.rb 文件的加载（如果存在）。

由于您在 env.rb 中需要 watir-webdriver 并且 env.rb 未加载，因此您的 hooks 文件将不知道 Watir 是什么。

一种解决方案是添加require 'watir-webdriver' (or require 'watir'）到您的 hooks.rb 文件。

另一种解决方案是将浏览器创建和 at_exit 挂钩移至 env.rb 文件中。这样，当使用试运行选项时，您将不会看到浏览器打开和关闭。