Show the seed in the reporter output. Make a default seed.

lib/rspec/core/command_line.rb

@@ -18,7 +18,7 @@ def run(err, out)
         @configuration.load_spec_files
         @world.announce_filters
 
-        @configuration.reporter.report(@world.example_count, @configuration.seed) do |reporter|
+        @configuration.reporter.report(@world.example_count, @configuration.seed_to_report) do |reporter|
           begin
             @configuration.run_hook(:before, :suite)
             @world.example_groups.ordered.map {|g| g.run(reporter)}.all? ? 0 : @configuration.failure_exit_code

lib/rspec/core/configuration.rb

@@ -44,7 +44,7 @@ def self.add_setting(name, opts={})
       add_setting :default_path, :default => 'spec'
       add_setting :show_failures_in_pending_blocks, :default => false
       add_setting :randomize, :default => false
-      add_setting :seed 
+      add_setting :seed, :default => srand % 0xFFFF
 
       CONDITIONAL_FILTERS = {
         :if     => lambda { |value, metadata| metadata.has_key?(:if) && !value },
@@ -462,6 +462,10 @@ def load_spec_files
         raise_if_rspec_1_is_loaded
       end
 
+      def seed_to_report
+        randomize? ? seed : nil
+      end
+
     private
 
       def assert_no_example_groups_defined(config_option)

lib/rspec/core/extensions/ordered.rb

@@ -4,7 +4,7 @@ module Extensions
       module Ordered
         def ordered
           if RSpec.configuration.randomize?
-            srand RSpec.configuration.seed if RSpec.configuration.seed
+            srand RSpec.configuration.seed
             sort_by { rand size }
           else
             self

lib/rspec/core/formatters/base_text_formatter.rb

@@ -86,6 +86,11 @@ def dump_pending
           end
         end
 
+        def seed(number)
+          output.puts
+          output.puts "This run was randomized by the following seed: #{number}"
+        end
+
         def close
           output.close if IO === output && output != $stdout
         end

lib/rspec/core/reporter.rb

@@ -22,7 +22,7 @@ def finish(seed)
         notify :dump_pending
         notify :dump_failures
         notify :dump_summary, @duration, @example_count, @failure_count, @pending_count
-        notify :seed, seed
+        notify :seed, seed if seed
       ensure
         notify :close
       end

spec/command_line/randomize_spec.rb

@@ -106,8 +106,8 @@
       """
     end
 
-    def get_failures(output, number)
-      output.scan(/\s{1}#{number}\).+/).uniq
+    def get_failures(number)
+      all_stdout.scan(/\s{1}#{number}\).+/).uniq
     end
 
     it 'runs the example groups and examples in random order' do
@@ -116,9 +116,13 @@ def get_failures(output, number)
       end
 
       1.upto(85) do |number|
-        get_failures(all_stdout, number).size.should be > 1,
+        get_failures(number).size.should be > 1,
           "Failure messages for ##{number} are the same"
       end
+
+      all_stdout.should match(
+        /This run was randomized by the following seed: \d+/
+      )
     end
 
     context 'given a seed' do
@@ -127,12 +131,14 @@ def get_failures(output, number)
           run_simple 'rspec spec/randomize_spec.rb --randomize --seed 123', false
         end
 
-        output = only_processes.last(2).map {|p| p.stdout(@aruba_keep_ansi) }.join
-
         1.upto(85) do |number|
-          get_failures(output, number).size.should eq(1),
+          get_failures(number).size.should eq(1),
             "Failure messages for ##{number} are not the same"
         end
+
+        all_stdout.should match(
+          /This run was randomized by the following seed: 123/
+        )
       end
     end
   end

spec/rspec/core/configuration_spec.rb

@@ -916,5 +916,26 @@ def metadata_hash(*args)
         config.formatters.should be_empty
       end
     end
+
+    describe '#seed_to_report' do
+      context 'with randomize set to true' do
+        before do
+          config.randomize = true
+          config.seed = 123
+        end
+
+        it 'returns the seed' do
+          config.seed_to_report.should eq(123)
+        end
+      end
+
+      context 'with randomize set to false' do
+        before { config.randomize = false }
+
+        it 'returns nil' do
+          config.seed_to_report.should be_nil
+        end
+      end
+    end
   end
 end