support exporting and ordering by test duration

Author: ebarajas

ruby/lib/ci/queue.rb

@@ -13,6 +13,9 @@
 require 'ci/queue/file'
 require 'ci/queue/grind'
 require 'ci/queue/bisect'
+require 'ci/queue/strategy/base'
+require 'ci/queue/strategy/random'
+require 'ci/queue/strategy/timing_based'
 
 module CI
   module Queue
@@ -28,11 +31,12 @@ def requeueable?(test_result)
       requeueable.nil? || requeueable.call(test_result)
     end
 
-    def shuffle(tests, random)
+    def shuffle(tests, random, config: nil)
       if shuffler
         shuffler.call(tests, random)
       else
-        tests.sort.shuffle(random: random)
+        strategy = get_strategy(config&.strategy)
+        strategy.order_tests(tests, random: random, config: config)
       end
     end
 
@@ -51,5 +55,16 @@ def from_uri(url, config)
       end
       implementation.from_uri(uri, config)
     end
+
+    private
+
+    def get_strategy(strategy_name)
+      case strategy_name&.to_sym
+      when :timing_based
+        Strategy::TimingBased.new
+      else
+        Strategy::Random.new
+      end
+    end
   end
 end

ruby/lib/ci/queue/configuration.rb

@@ -8,6 +8,7 @@ class Configuration
       attr_accessor :requeue_tolerance, :namespace, :failing_test, :statsd_endpoint
       attr_accessor :max_test_duration, :max_test_duration_percentile, :track_test_duration
       attr_accessor :max_test_failed, :redis_ttl
+      attr_accessor :strategy, :timing_file, :timing_fallback_duration, :export_timing_file
       attr_reader :circuit_breakers
       attr_writer :seed, :build_id
       attr_writer :queue_init_timeout, :report_timeout, :inactive_workers_timeout
@@ -51,7 +52,8 @@ def initialize(
         grind_count: nil, max_duration: nil, failure_file: nil, max_test_duration: nil,
         max_test_duration_percentile: 0.5, track_test_duration: false, max_test_failed: nil,
         queue_init_timeout: nil, redis_ttl: 8 * 60 * 60, report_timeout: nil, inactive_workers_timeout: nil,
-        export_flaky_tests_file: nil, known_flaky_tests: []
+        export_flaky_tests_file: nil, known_flaky_tests: [],
+        strategy: :random, timing_file: nil, timing_fallback_duration: 100.0, export_timing_file: nil
       )
         @build_id = build_id
         @circuit_breakers = [CircuitBreaker::Disabled]
@@ -77,6 +79,10 @@ def initialize(
         @report_timeout = report_timeout
         @inactive_workers_timeout = inactive_workers_timeout
         @export_flaky_tests_file = export_flaky_tests_file
+        @strategy = strategy
+        @timing_file = timing_file
+        @timing_fallback_duration = timing_fallback_duration
+        @export_timing_file = export_timing_file
       end
 
       def queue_init_timeout

ruby/lib/ci/queue/redis/worker.rb

@@ -30,7 +30,7 @@ def distributed?
 
         def populate(tests, random: Random.new)
           @index = tests.map { |t| [t.id, t] }.to_h
-          tests = Queue.shuffle(tests, random)
+          tests = Queue.shuffle(tests, random, config: config)
           push(tests.map(&:id))
           self
         end

ruby/lib/ci/queue/strategy/base.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module CI
+  module Queue
+    module Strategy
+      class Base
+        def order_tests(tests, random: Random.new, config: nil)
+          raise NotImplementedError, "#{self.class} must implement #order_tests"
+        end
+      end
+    end
+  end
+end

ruby/lib/ci/queue/strategy/random.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+require_relative 'base'
+
+module CI
+  module Queue
+    module Strategy
+      class Random < Base
+        def order_tests(tests, random: Random.new, config: nil)
+          tests.sort.shuffle(random: random)
+        end
+      end
+    end
+  end
+end

ruby/lib/ci/queue/strategy/timing_based.rb

@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+require_relative 'base'
+require 'json'
+
+module CI
+  module Queue
+    module Strategy
+      class TimingBased < Base
+        def order_tests(tests, random: Random.new, config: nil)
+          timing_data = load_timing_data(config&.timing_file)
+          fallback_duration = config&.timing_fallback_duration || 100.0
+
+          tests.sort_by do |test|
+            duration = timing_data[test.id] || fallback_duration
+            -duration # Negative for descending order (longest first)
+          end
+        end
+
+        private
+
+        def load_timing_data(file_path)
+          return {} unless file_path && ::File.exist?(file_path)
+          
+          JSON.parse(::File.read(file_path))
+        rescue JSON::ParserError => e
+          warn "Warning: Could not parse timing file #{file_path}: #{e.message}"
+          {}
+        rescue => e
+          warn "Warning: Could not read timing file #{file_path}: #{e.message}"
+          {}
+        end
+      end
+    end
+  end
+end

ruby/lib/minitest/queue/runner.rb

@@ -218,8 +218,23 @@ def report_command
           File.write(queue_config.export_flaky_tests_file, failures)
         end
 
+        # Handle timing data reporting and export
+        test_time_reporter_success = if queue_config.track_test_duration
+          test_time_record = CI::Queue::Redis::TestTimeRecord.new(queue_url, queue_config)
+          test_time_reporter = TestTimeReporter.new(
+            build: test_time_record,
+            limit: queue_config.max_test_duration,
+            percentile: queue_config.max_test_duration_percentile,
+            export_file: queue_config.export_timing_file
+          )
+          test_time_reporter.report
+          test_time_reporter.success?
+        else
+          true
+        end
+
         reporter.report
-        exit! reporter.success? ? 0 : 1
+        exit! reporter.success? && test_time_reporter_success ? 0 : 1
       end
 
       def report_grind_command
@@ -241,6 +256,7 @@ def report_grind_command
             build: test_time_record,
             limit: queue_config.max_test_duration,
             percentile: queue_config.max_test_duration_percentile,
+            export_file: queue_config.export_timing_file
           )
           test_time_reporter.report
 
@@ -564,6 +580,38 @@ def parser
             self.test_globs = test_globs
           end
 
+          help = <<~EOS
+            Test ordering strategy: random, timing_based (default: random)
+          EOS
+          opts.separator ""
+          opts.on('--strategy STRATEGY', help) do |strategy|
+            queue_config.strategy = strategy.to_sym
+          end
+
+          help = <<~EOS
+            Path to JSON timing file for timing_based strategy
+          EOS
+          opts.separator ""
+          opts.on('--timing-file PATH', help) do |path|
+            queue_config.timing_file = path
+          end
+
+          help = <<~EOS
+            Fallback duration in ms for unknown tests (default: 100)
+          EOS
+          opts.separator ""
+          opts.on('--timing-fallback DURATION', Float, help) do |duration|
+            queue_config.timing_fallback_duration = duration
+          end
+
+          help = <<~EOS
+            Export test timing data to JSON file after run (use with report command)
+          EOS
+          opts.separator ""
+          opts.on('--export-timing-file PATH', help) do |path|
+            queue_config.export_timing_file = path
+          end
+
           opts.separator ""
           opts.separator "    retry: Replays a previous run in the same order."
 

ruby/lib/minitest/queue/test_time_reporter.rb

@@ -1,20 +1,24 @@
 # frozen_string_literal: true
 require 'minitest/reporters'
+require 'json'
 
 module Minitest
   module Queue
     class TestTimeReporter < Minitest::Reporters::BaseReporter
       include ::CI::Queue::OutputHelpers
 
-      def initialize(build:, limit: nil, percentile: nil, **options)
+      def initialize(build:, limit: nil, percentile: nil, export_file: nil, **options)
         super(options)
         @test_time_hash = build.fetch
         @limit = limit
         @percentile = percentile
+        @export_file = export_file
         @success = true
       end
 
       def report
+        export_timing_data if @export_file
+
         return if limit.nil? || test_time_hash.empty?
 
         puts '+++ Test Time Report'
@@ -47,6 +51,20 @@ def record(*)
 
       attr_reader :test_time_hash, :limit, :percentile
 
+      def export_timing_data
+        return if test_time_hash.empty?
+
+        # Convert test_time_hash to simple format: {"TestClass#method": avg_duration_ms}
+        timing_data = test_time_hash.transform_values do |durations|
+          durations.sum.to_f / durations.size  # Average duration
+        end
+
+        File.write(@export_file, JSON.pretty_generate(timing_data))
+        puts "Exported timing data for #{timing_data.size} tests to #{@export_file}"
+      rescue => e
+        puts "Warning: Failed to export timing data to #{@export_file}: #{e.message}"
+      end
+
       def humanized_percentile
         percentile_in_percentage = percentile * 100
         "#{percentile_in_percentage.to_i}th"