# File lib/selenium/webdriver/common/platform.rb, line 27 def os @os ||= ( host_os = RbConfig::CONFIG['host_os'] case host_os when /mswin|msys|mingw|cygwin|bccwin|wince|emc/ :windows when /darwin|mac os/ :macosx when /linux/ :linux when /solaris|bsd/ :unix else raise Error::WebDriverError, "unknown os: #{host_os.inspect}" end ) end