Module: ParallelTests::Tasks

Defined in:
lib/parallel_tests/tasks.rb

Class Method Summary collapse

Class Method Details

.check_for_pending_migrations ⇒ Object 



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# File 'lib/parallel_tests/tasks.rb', line 47

def check_for_pending_migrations
  ["db:abort_if_pending_migrations", "app:db:abort_if_pending_migrations"].each do |abort_migrations|
    if Rake::Task.task_defined?(abort_migrations)
      Rake::Task[abort_migrations].invoke
      break
    end
  end
end

.parse_args(args) ⇒ Object

parallel:spec[:count, :pattern, :options]



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# File 'lib/parallel_tests/tasks.rb', line 57

def parse_args(args)
  # order as given by user
  args = [args[:count], args[:pattern], args[:options]]

  # count given or empty ?
  # parallel:spec[2,models,options]
  # parallel:spec[,models,options]
  count = args.shift if args.first.to_s =~ /^\d*$/
  num_processes = count.to_i unless count.to_s.empty?
  pattern = args.shift
  options = args.shift

  [num_processes, pattern.to_s, options.to_s]
end

.purge_before_load ⇒ Object 



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# File 'lib/parallel_tests/tasks.rb', line 10

def purge_before_load
  "db:test:purge" if Gem::Version.new(Rails.version) > Gem::Version.new('4.2.0')
end

.rails_env ⇒ Object 



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# File 'lib/parallel_tests/tasks.rb', line 6

def rails_env
  ENV['RAILS_ENV'] || 'test'
end

.run_in_parallel(cmd, options = {}) ⇒ Object 



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# File 'lib/parallel_tests/tasks.rb', line 14

def run_in_parallel(cmd, options={})
  count = " -n #{options[:count]}" unless options[:count].to_s.empty?
  executable = File.expand_path("../../../bin/parallel_test", __FILE__)
  command = "#{executable} --exec '#{cmd}'#{count}#{' --non-parallel' if options[:non_parallel]}"
  command << " --advance-number #{options[:advance_number]}" if options[:advance_number]
  abort unless system(command)
end

.suppress_output(command, ignore_regex) ⇒ Object

this is a crazy-complex solution for a very simple problem: removing certain lines from the output without chaning the exit-status normally I’d not do this, but it has been lots of fun and a great learning experience :)

  • sed does not support | without -r

  • grep changes 0 exitstatus to 1 if nothing matches

  • sed changes 1 exitstatus to 0

  • pipefail makes pipe fail with exitstatus of first failed command

  • pipefail is not supported in (zsh)

  • defining a new rake task like silence_schema would force users to load parallel_tests in test env

  • do not use ‘ since run_in_parallel uses them to quote stuff

  • simple system “set -o pipefail” returns nil even though set -o pipefail exists with 0



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# File 'lib/parallel_tests/tasks.rb', line 34

def suppress_output(command, ignore_regex)
  activate_pipefail = "set -o pipefail"
  remove_ignored_lines = %Q{(grep -v "#{ignore_regex}" || test 1)}

  if File.executable?('/bin/bash') && system('/bin/bash', '-c', "#{activate_pipefail} 2>/dev/null && test 1")
    # We need to shell escape single quotes (' becomes '"'"') because
    # run_in_parallel wraps command in single quotes
    %Q{/bin/bash -c '"'"'#{activate_pipefail} && (#{command}) | #{remove_ignored_lines}'"'"'}
  else
    command
  end
end