tests: add option for listing all failed case IDs

tests/run.rb

@@ -57,9 +57,13 @@ def main
       tests = controller.results.results.keys.collect { |e| re.match(e) ? $1 : nil }.compact
       error_and_exit "No tests matched RE #{re}" if tests.empty?
       tests.each { |e| controller.add_test_case e }
+    elsif ((arg == "-F" || (arg == "--list-failed")))
+      controller.list_failed_ids
+      exit 0
     elsif ((arg == "-h") || (arg == "--help"))
       puts <<EOHELP
 Syntax: run.rb [options]
+  -F, --list-failed     list IDs of failed tests
   -f, --failed          only run tests marked as failed
   -n, --new             only run tests for which no entry exists in results.txt
   -dDATE                only run tests added after DATE (YYYYMMDD-HHMM)

tests/test.d/controller.rb

@@ -162,4 +162,17 @@ class Controller
 
     @results_mutex.unlock
   end
+
+  def list_failed_ids
+    entries = @dir_entries.collect do |entry|
+      if (FileTest.file?(entry) && (entry =~ /^test-(\d+).*\.rb$/))
+        class_name  = file_name_to_class_name entry
+        @results.status?(class_name) == :failed ? $1.to_i : nil
+      else
+        nil
+      end
+    end
+
+    puts entries.reject(&:nil?).sort.map(&:to_s).join(" ")
+  end
 end