From: Joel Pearson <lists@...>
Date: 2012-10-06T04:30:43+09:00
Subject: Re: How can I catch browser error in watir-webdriver?

Use something along these lines to record the types of error and 
simulate them. Once you have the exact error reported, like "end of file 
reached", you can rescue that error by using rescue like a case 
statement: http://rubylearning.com/satishtalim/ruby_exceptions.html

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require 'watir-webdriver'

begin

  b = Watir::Browser.new
  10.times {
    b.goto "www.google.com"
    sleep 5
    #Close or disconnect the browser here
    #and see what error message you get
    b.goto "about:blank"
  }

rescue
  puts "Your error message was: #{$!}"
  exit
ensure
  b.close rescue nil
end
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