Add ability to specify random seed value in tests.

test/rakefile

@@ -29,6 +29,7 @@ end
 
 $cmock_test_config_file = DEFAULT_CONFIG_FILE
 $cmock_test_overlay_file = nil
+$cmock_test_seed = nil
 
 task :prep_system_tests => SYSTEM_TEST_SUPPORT_DIRS
 task :default => [:test]
@@ -41,6 +42,12 @@ task :config, [:config_file, :cmock_overlay] do |t, args|
   $cmock_test_overlay_file = args[:cmock_overlay]
 end
 
+desc "Fix the minitest random seed for repeatable Ruby unit test ordering"
+task :seed, [:seed_value] do |t, args|
+  $cmock_test_seed = args[:seed_value]
+  ENV['TESTOPTS'] = "#{ENV['TESTOPTS']} --seed=#{$cmock_test_seed}".strip
+end
+
 task :config_toolchains do 
   configure_toolchain($cmock_test_config_file, $cmock_test_overlay_file)
 end

test/rakefile_helper.rb

@@ -315,7 +315,8 @@ module RakefileHelpers
     total_runs = total_failures = total_errors = total_skips = 0
     Dir['unit/*_test.rb'].sort.each do |tst|
       report "\nRunning #{tst.to_s}"
-      output = execute("ruby -I. #{tst} -v", true, false)
+      seed_opt = $cmock_test_seed ? " --seed=#{$cmock_test_seed}" : ''
+      output = execute("ruby -I. #{tst} -v#{seed_opt}", true, false)
       output.each_line do |line|
         if line =~ /(\d+) runs, \d+ assertions, (\d+) failures, (\d+) errors, (\d+) skips/
           total_runs     += Regexp.last_match(1).to_i