KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use run method of ParallelTests Package

Best Parallel_tests_ruby code snippet using ParallelTests.run

tasks.rb

Source:tasks.rb

...21        if Gem::Version.new(Rails.version) > Gem::Version.new('4.2.0')22          Rake::Task.task_defined?('db:purge') ? 'db:purge' : 'app:db:purge'23        end24      end25      def run_in_parallel(cmd, options={})26        load_lib27        count = " -n #{options[:count]}" unless options[:count].to_s.empty?28        # Using the relative path to find the binary allow to run a specific version of it29        executable = File.expand_path("../../../bin/parallel_test", __FILE__)30        command = "#{ParallelTests.with_ruby_binary(Shellwords.escape(executable))} --exec '#{cmd}'#{count}#{' --non-parallel' if options[:non_parallel]}"31        abort unless system(command)32      end33      # this is a crazy-complex solution for a very simple problem:34      # removing certain lines from the output without changing the exit-status35      # normally I'd not do this, but it has been lots of fun and a great learning experience :)36      #37      # - sed does not support | without -r38      # - grep changes 0 exitstatus to 1 if nothing matches39      # - sed changes 1 exitstatus to 040      # - pipefail makes pipe fail with exitstatus of first failed command41      # - pipefail is not supported in (zsh)42      # - defining a new rake task like silence_schema would force users to load parallel_tests in test env43      # - do not use ' since run_in_parallel uses them to quote stuff44      # - simple system "set -o pipefail" returns nil even though set -o pipefail exists with 045      def suppress_output(command, ignore_regex)46        activate_pipefail = "set -o pipefail"47        remove_ignored_lines = %Q{(grep -v "#{ignore_regex}" || test 1)}48        if File.executable?('/bin/bash') && system('/bin/bash', '-c', "#{activate_pipefail} 2>/dev/null && test 1")49          # We need to shell escape single quotes (' becomes '"'"') because50          # run_in_parallel wraps command in single quotes51          %Q{/bin/bash -c '"'"'#{activate_pipefail} && (#{command}) | #{remove_ignored_lines}'"'"'}52        else53          command54        end55      end56      def suppress_schema_load_output(command)57        ParallelTests::Tasks.suppress_output(command, "^   ->\\|^-- ")58      end59      def check_for_pending_migrations60        ["db:abort_if_pending_migrations", "app:db:abort_if_pending_migrations"].each do |abort_migrations|61          if Rake::Task.task_defined?(abort_migrations)62            Rake::Task[abort_migrations].invoke63            break64          end65        end66      end67      # parallel:spec[:count, :pattern, :options, :pass_through]68      def parse_args(args)69        # order as given by user70        args = [args[:count], args[:pattern], args[:options], args[:pass_through]]71        # count given or empty ?72        # parallel:spec[2,models,options]73        # parallel:spec[,models,options]74        count = args.shift if args.first.to_s =~ /^\d*$/75        num_processes = count.to_i unless count.to_s.empty?76        pattern = args.shift77        options = args.shift78        pass_through = args.shift79        [num_processes, pattern.to_s, options.to_s, pass_through.to_s]80      end81    end82  end83end84namespace :parallel do85  desc "Setup test databases via db:setup --> parallel:setup[num_cpus]"86  task :setup, :count do |_,args|87    command = "#{ParallelTests::Tasks.rake_bin} db:setup RAILS_ENV=#{ParallelTests::Tasks.rails_env}"88    ParallelTests::Tasks.run_in_parallel(ParallelTests::Tasks.suppress_schema_load_output(command), args)89  end90  desc "Create test databases via db:create --> parallel:create[num_cpus]"91  task :create, :count do |_,args|92    ParallelTests::Tasks.run_in_parallel(93      "#{ParallelTests::Tasks.rake_bin} db:create RAILS_ENV=#{ParallelTests::Tasks.rails_env}", args)94  end95  desc "Drop test databases via db:drop --> parallel:drop[num_cpus]"96  task :drop, :count do |_,args|97    ParallelTests::Tasks.run_in_parallel(98      "#{ParallelTests::Tasks.rake_bin} db:drop RAILS_ENV=#{ParallelTests::Tasks.rails_env} " \99      "DISABLE_DATABASE_ENVIRONMENT_CHECK=1", args)100  end101  desc "Update test databases by dumping and loading --> parallel:prepare[num_cpus]"102  task(:prepare, [:count]) do |_,args|103    ParallelTests::Tasks.check_for_pending_migrations104    if defined?(ActiveRecord::Base) && [:ruby, :sql].include?(ActiveRecord::Base.schema_format)105      # fast: dump once, load in parallel106      type = (ActiveRecord::Base.schema_format == :ruby ? "schema" : "structure")107      Rake::Task["db:#{type}:dump"].invoke108      # remove database connection to prevent "database is being accessed by other users"109      ActiveRecord::Base.remove_connection if ActiveRecord::Base.configurations.any?110      Rake::Task["parallel:load_#{type}"].invoke(args[:count])111    else112      # slow: dump and load in in serial113      args = args.to_hash.merge(:non_parallel => true) # normal merge returns nil114      task_name = Rake::Task.task_defined?('db:test:prepare') ? 'db:test:prepare' : 'app:db:test:prepare'115      ParallelTests::Tasks.run_in_parallel("#{ParallelTests::Tasks.rake_bin} #{task_name}", args)116      next117    end118  end119  # when dumping/resetting takes too long120  desc "Update test databases via db:migrate --> parallel:migrate[num_cpus]"121  task :migrate, :count do |_,args|122    ParallelTests::Tasks.run_in_parallel(123      "#{ParallelTests::Tasks.rake_bin} db:migrate RAILS_ENV=#{ParallelTests::Tasks.rails_env}", args)124  end125  desc "Rollback test databases via db:rollback --> parallel:rollback[num_cpus]"126  task :rollback, :count do |_,args|127    ParallelTests::Tasks.run_in_parallel(128      "#{ParallelTests::Tasks.rake_bin} db:rollback RAILS_ENV=#{ParallelTests::Tasks.rails_env}", args)129  end130  # just load the schema (good for integration server <-> no development db)131  desc "Load dumped schema for test databases via db:schema:load --> parallel:load_schema[num_cpus]"132  task :load_schema, :count do |_,args|133    command = "#{ParallelTests::Tasks.rake_bin} #{ParallelTests::Tasks.purge_before_load} " \134      "db:schema:load RAILS_ENV=#{ParallelTests::Tasks.rails_env} DISABLE_DATABASE_ENVIRONMENT_CHECK=1"135    ParallelTests::Tasks.run_in_parallel(ParallelTests::Tasks.suppress_schema_load_output(command), args)136  end137  # load the structure from the structure.sql file138  desc "Load structure for test databases via db:structure:load --> parallel:load_structure[num_cpus]"139  task :load_structure, :count do |_,args|140    ParallelTests::Tasks.run_in_parallel(141      "#{ParallelTests::Tasks.rake_bin} #{ParallelTests::Tasks.purge_before_load} " \142      "db:structure:load RAILS_ENV=#{ParallelTests::Tasks.rails_env} DISABLE_DATABASE_ENVIRONMENT_CHECK=1", args)143  end144  desc "Load the seed data from db/seeds.rb via db:seed --> parallel:seed[num_cpus]"145  task :seed, :count do |_,args|146    ParallelTests::Tasks.run_in_parallel(147      "#{ParallelTests::Tasks.rake_bin} db:seed RAILS_ENV=#{ParallelTests::Tasks.rails_env}", args)148  end149  desc "Launch given rake command in parallel"150  task :rake, :command, :count do |_, args|151    ParallelTests::Tasks.run_in_parallel(152      "RAILS_ENV=#{ParallelTests::Tasks.rails_env} #{ParallelTests::Tasks.rake_bin} " \153      "#{args.command}", args)154  end155  ['test', 'spec', 'features', 'features-spinach'].each do |type|156    desc "Run #{type} in parallel with parallel:#{type}[num_cpus]"157    task type, [:count, :pattern, :options, :pass_through] do |t, args|158      ParallelTests::Tasks.check_for_pending_migrations159      ParallelTests::Tasks.load_lib160      count, pattern, options, pass_through = ParallelTests::Tasks.parse_args(args)161      test_framework = {162        'spec' => 'rspec',163        'test' => 'test',164        'features' => 'cucumber',165        'features-spinach' => 'spinach',166      }[type]167      if test_framework == 'spinach'168        type = 'features'169      end170      # Using the relative path to find the binary allow to run a specific version of it171      executable = File.join(File.dirname(__FILE__), '..', '..', 'bin', 'parallel_test')172      command = "#{ParallelTests.with_ruby_binary(Shellwords.escape(executable))} #{type} " \173        "--type #{test_framework} "        \174        "-n #{count} "                     \175        "--pattern '#{pattern}' "          \176        "--test-options '#{options}' "     \177        "#{pass_through}"178      abort unless system(command) # allow to chain tasks e.g. rake parallel:spec parallel:features179    end180  end181end...

parallel_tests_spec.rb

Source:parallel_tests_spec.rb

...43      group_size.should be_close(size_of(groups[1]), diff)44      group_size.should be_close(size_of(groups[2]), diff)45    end46  end47  describe :run_tests do48    it "uses TEST_ENV_NUMBER=blank when called for process 0" do49      ParallelTests.should_receive(:open).with{|x|x=~/TEST_ENV_NUMBER= /}.and_return mock(:gets=>false)50      ParallelTests.run_tests(['xxx'],0)51    end52    it "uses TEST_ENV_NUMBER=2 when called for process 1" do53      ParallelTests.should_receive(:open).with{|x| x=~/TEST_ENV_NUMBER=2/}.and_return mock(:gets=>false)54      ParallelTests.run_tests(['xxx'],1)55    end56    it "returns the output" do57      io = open('spec/spec_helper.rb')58      ParallelTests.stub!(:print)59      ParallelTests.should_receive(:open).and_return io60      ParallelTests.run_tests(['xxx'],1).should =~ /\$LOAD_PATH << File/61    end62  end63  describe :find_results do64    it "finds multiple results in test output" do65      output = <<EOF66....F...67..68failute fsddsfsd69...70ff.**..710 examples, 0 failures, 0 pending72ff.**..731 example, 1 failure, 1 pending74EOF...

run

Using AI Code Generation

1ParallelTests.run(ARGV)2  def self.run(argv)3      Parallel.map(argv) do |arg|4tests = %w(test1 test2 test3)5Parallel.map(tests) do |test|6tests = %w(test1 test2 test3)7Parallel.map(tests) do |test|

run

Using AI Code Generation

1output = pt.run(2, 'test_*.rb')2  def run(processes, file_pattern)3        output << Open3.capture3(command)[0]4    threads.each(&:join)5    assert_equal(1, 1)6    assert_equal(1, 1)7    assert_equal(1, 1)8    assert_equal(1, 1)

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.