merge.rb

require 'fileutils'
require 'nokogiri'

folder = "modules"
files  = []

Dir.glob("#{folder}/**/output.xml").each do |f|
  files << f
end

errors   = 0
failures = 0
skipped  = 0
tests    = 0
time     = 0
cases    = []

files.each do |file|

  # Add up the attributes
  temp = File.new(file)
  xdoc = Nokogiri::XML(temp)
  xdoc.css("testsuite").each do |element|
    errors   += element.attr("errors").to_i
    failures += element.attr("failures").to_i
    skipped  += element.attr("skipped").to_i
    tests    += element.attr("tests").to_i
    time     += element.attr("time").to_f
  end

  # Collect the test cases
  xdoc.css("testcase").each do |element|
    cases << element.to_s
  end

  File.delete(file)

end

# Write the final merged results.xml
results = File.new("output.xml", "w")
results.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n")
results.write("<testsuite errors=\"#{errors}\" failures=\"#{failures}\" skipped=\"#{skipped}\" tests=\"#{tests}\" time=\"#{time}\">\n")
results.write("  <properties/>\n")
cases.each { |tc| results.write("  #{tc}\n") }
results.write("</testsuite>")
results.close