How to use tests_in_groups method of ParallelTests.Test Package

Best Parallel_tests_ruby code snippet using ParallelTests.Test.tests_in_groups

runner.rb

Source:runner.rb

...36        group_opts[:runtime_log] = "tmp/turbo_rspec_runtime.log"37      else38        group_opts[:group_by] = :filesize39      end40      tests_in_groups =41        ParallelTests::RSpec::Runner.tests_in_groups(42          @files,43          @num_processes,44          **group_opts,45        )46      setup_tmp_dir47      subprocess_opts = {48        record_runtime: use_runtime_info49      }50      start_multisite_subprocess(@files, **subprocess_opts)51      tests_in_groups.each_with_index do |tests, process_id|52        start_regular_subprocess(tests, process_id + 1, **subprocess_opts)53      end54      handle_messages55      @reporter.finish56      @threads.each(&:join)57      @reporter.failed_examples.empty?58    end59    protected60    def check_for_migrations61      config =62        ActiveRecord::Base63          .configurations["test"]64          .merge("database" => "discourse_test_1")65      ActiveRecord::Tasks::DatabaseTasks.migrations_paths = ['db/migrate', 'db/post_migrate']...

parallel_tests_spec.rb

Source:parallel_tests_spec.rb

...3  def size_of(group)4    group.inject(0) { |sum, test| sum += File.stat(test).size }5  end6  7  describe :tests_in_groups_of do8    before :all do9      system "rm -rf #{FAKE_RAILS_ROOT}; mkdir -p #{FAKE_RAILS_ROOT}/test/temp"10      1.upto(100) do |i|11        size = 100 * i12        File.open("#{FAKE_RAILS_ROOT}/test/temp/x#{i}_test.rb", 'w') { |f| f.puts 'x' * size }13      end14    end15    it "finds all tests" do16      found = ParallelTests.tests_in_groups(FAKE_RAILS_ROOT, 1)17      all = [ Dir["#{FAKE_RAILS_ROOT}/test/**/*_test.rb"] ]18      (found.flatten - all.flatten).should == []19    end20    it "partitions them into groups by equal size" do21      groups = ParallelTests.tests_in_groups(FAKE_RAILS_ROOT, 2)22      groups.size.should == 223      group0 = size_of(groups[0])24      group1 = size_of(groups[1])25      diff = group0 * 0.126      group0.should be_close(group1, diff)27    end28    29    it 'should partition correctly with a group size of 4' do30      groups = ParallelTests.tests_in_groups(FAKE_RAILS_ROOT, 4)31      groups.size.should == 432      group_size = size_of(groups[0])33      diff = group_size * 0.1     34      group_size.should be_close(size_of(groups[1]), diff)35      group_size.should be_close(size_of(groups[2]), diff)36      group_size.should be_close(size_of(groups[3]), diff)37    end38    it 'should partition correctly with an uneven group size' do39      groups = ParallelTests.tests_in_groups(FAKE_RAILS_ROOT, 3)40      groups.size.should == 341      group_size = size_of(groups[0])42      diff = group_size * 0.143      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)...

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