ruby - Ruby 中的异常处理

Question

在下面的代码中，我想获取所有失败的列表rescue

puts "Verifying Home Page"
  begin   
    page.find('#logoAnchor')
    puts "logo anchor found"
    page.find('.navbar-inner')
    puts "Header bar found"
    page.find('.unstyled')
    puts "Found occations frame"
    page.find('#easyPrintPromoBox')
    puts "Easy Print Frame Found!"
    page.find('.tabbable')
    puts "3 Tabs  Found!"
    page.find('#givingCardPromoBox')
    puts "Create Frame Found!"
    page.find('.footer')
    puts "Footer Found!"

  rescue
    puts "Logo anchor not Found"
  end

在这里，我仅在未找到徽标锚点的情况下捕获异常。如果未找到任何异常，我必须捕获异常。例如：

如果未找到徽标锚，则将“徽标锚不存在”放入rescue
如果标题栏不存在，则将“未找到标题栏”放入rescue

Answer 1

这是一种使用方法Array#partition

# dummy placeholder method for `page.find`
def find(el)
  if rand < 0.5
    raise :nop
  else
    true
  end
end

selectors = ['#logoAnchor', '.navbar-inner', '.unstyled', '#easyPrintPromoBox', '.tabbable', '#givingCardPromoBox', '.footer']
found, not_found = selectors.partition do |selector|
  find(selector) rescue false
end

puts "Found: #{found}"
puts "Not found: #{not_found}"

样本输出：

Found: ["#logoAnchor", ".unstyled", "#easyPrintPromoBox", ".tabbable"]
Not found: [".navbar-inner", "#givingCardPromoBox", ".footer"]

这应该在 Capybara 中工作（未测试）：

selectors = ['#logoAnchor', '.navbar-inner', '.unstyled', '#easyPrintPromoBox', '.tabbable', '#givingCardPromoBox', '.footer']
found, not_found = selectors.partition do |selector|
  page.find(selector) rescue false
end

puts "Found: #{found}"
puts "Not found: #{not_found}"

Answer 2

puts "Verifying Home Page"
  begin   
    page.find('#logoAnchor')
    puts "logo anchor found"
  rescue
    puts "Logo anchor not Found"
  end

  begin   
    page.find('#navbar-inner')
    puts "navbar-inner found"
  rescue
    puts "navbar-inner not Found"
  end

  ...
  end

或者

def findOrRescue(id, successMsg, errorMsg)
   begin   
    page.find(id)
    puts successMsg
   rescue
    puts errorMsg
   end
end

 puts "Verifying Home Page"
   findOrRescue("#logoAnchor", "logo anchor found", "Logo anchor not Found")
   ...