Run (a) cucumber feature test(s) repeatedly and count successes and failures

repeated_feature_test.rb

#!/usr/bin/env ruby
#
# USAGE:
# $ ./repeated_feature_test.rb n test
#   n:    number of times to run the test
#   test: the test you would like to run, such as "cucumber" or
#         "cucumber features/posts.feature --format progress"
#
# Due to the nature of executing commands, you will not see output until the end
# of each test round. For example, if you set "cucumber" as the task, you will
# not see output until the entire cucumber test has completed once.
#
# PS: Make sure to make this script executable:
# chmod +x repeated_feature_test.rb
#

require 'benchmark'

run_spec_n_times = ARGV.shift.to_i
failure_count    = 0

total_time = Benchmark.realtime do
  run_spec_n_times.times do |i|
    puts "##{i+1} / #{run_spec_n_times} " +
         "(S: #{i-failure_count} | F: #{failure_count}) " +
         "@ #{Time.now.strftime("%F %T.%3N")}"
    result = %x[ #{ARGV.join(' ')} ]

    # if result has failed, lets track it
    if result.include? "failed steps"
      failure_count += 1
    end

    printf result
  end
end

printf "" +
"**************************************************************************\n" +
"**** REPEATED FEATURE TEST COMPLETE **************************************\n" +
"**************************************************************************\n" +
"**** Total Time: #{total_time.round(3)}s"                              + "\n" +
"**** Successes:  #{run_spec_n_times - failure_count}"                  + "\n" +
"**** Failures:   #{failure_count}"                                     + "\n" +
"**************************************************************************\n" +
"**************************************************************************\n"