redirecting some ugly output when running tests

test/master_test.rb

@@ -202,14 +202,16 @@ class MasterTest < Test::Unit::TestCase
 
     context "running a local worker" do
       setup do
-        @pid = Process.fork do
-          Hydra::Master.new(
-                            :files => [test_file] * 6,
-                            :autosort => false,
-                            :listeners => [@master_listener],
-                            :runner_listeners => [@runner_listener],
-                            :verbose => false
-                            )
+        capture_stderr do # redirect stderr
+          @pid = Process.fork do
+            Hydra::Master.new(
+                              :files => [test_file] * 6,
+                              :autosort => false,
+                              :listeners => [@master_listener],
+                              :runner_listeners => [@runner_listener],
+                              :verbose => false
+                              )
+          end
         end
       end
 
@@ -224,7 +226,9 @@ class MasterTest < Test::Unit::TestCase
 
       should "run runner_end after interruption signal" do
         wait_for_runner_to_begin
+
         Process.kill 'SIGINT', @pid
+
         Process.waitpid @pid
 
         wait_for_file_for_a_while alternate_target_file, 2
@@ -235,20 +239,22 @@ class MasterTest < Test::Unit::TestCase
     context "running a remote worker" do
       setup do
         copy_worker_init_file # this method has a protection to avoid erasing an existing worker_init_file
-        @pid = Process.fork do
-          Hydra::Master.new(
-                            :files => [test_file] * 6,
-                            :autosort => false,
-                            :listeners => [@master_listener],
-                            :runner_listeners => [@runner_listener],
-                            :workers => [{
-                                           :type => :ssh,
-                                           :connect => 'localhost',
-                                           :directory => remote_dir_path,
-                                           :runners => 1
+        capture_stderr do # redirect stderr
+          @pid = Process.fork do
+            Hydra::Master.new(
+                              :files => [test_file] * 6,
+                              :autosort => false,
+                              :listeners => [@master_listener],
+                              :runner_listeners => [@runner_listener],
+                              :workers => [{
+                                             :type => :ssh,
+                                             :connect => 'localhost',
+                                             :directory => remote_dir_path,
+                                             :runners => 1
                                          }],
-                            :verbose => false
-                            )
+                              :verbose => false
+                              )
+          end
         end
       end
 

test/runner_test.rb

@@ -80,20 +80,22 @@ class RunnerTest < Test::Unit::TestCase
       # because of all the crap cucumber pulls in
       # we run this in a fork to not contaminate
       # the main test environment
-      pid = Process.fork do
-        runner = Hydra::Runner.new(:io => File.new('/dev/null', 'w'))
-        runner.run_file(cucumber_feature_file)
-        assert File.exists?(target_file)
-        assert_equal "HYDRA", File.read(target_file)
-        
-        FileUtils.rm_f(target_file)
-        
-        runner.run_file(alternate_cucumber_feature_file)
-        assert File.exists?(alternate_target_file)
-        assert_equal "HYDRA", File.read(alternate_target_file)
-        assert !File.exists?(target_file)
+      capture_stderr do # redirect stderr
+        pid = Process.fork do
+          runner = Hydra::Runner.new(:io => File.new('/dev/null', 'w'))
+          runner.run_file(cucumber_feature_file)
+          assert File.exists?(target_file)
+          assert_equal "HYDRA", File.read(target_file)
+
+          FileUtils.rm_f(target_file)
+
+          runner.run_file(alternate_cucumber_feature_file)
+          assert File.exists?(alternate_target_file)
+          assert_equal "HYDRA", File.read(alternate_target_file)
+          assert !File.exists?(target_file)
+        end
+        Process.wait pid
       end
-      Process.wait pid
     end
 
     should "be able to run a runner over ssh" do

test/test_helper.rb

@@ -4,6 +4,7 @@ gem 'shoulda', '2.10.3'
 gem 'rspec', '2.0.0.beta.19'
 require 'shoulda'
 require 'tmpdir'
+require "stringio"
 
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
 $LOAD_PATH.unshift(File.dirname(__FILE__))
@@ -65,6 +66,18 @@ class Test::Unit::TestCase
     File.expand_path(File.join(File.dirname(__FILE__), 'fixtures', 'hydra_worker_init.rb'))
   end
 
+  def capture_stderr
+    # The output stream must be an IO-like object. In this case we capture it in
+    # an in-memory IO object so we can return the string value. You can assign any
+    # IO object here.
+    previous_stderr, $stderr = $stderr, StringIO.new
+    yield
+    $stderr.string
+  ensure
+    # Restore the previous value of stderr (typically equal to STDERR).
+    $stderr = previous_stderr
+  end
+
   #this method allow us to wait for a file for a maximum number of time, so the
   #test can pass in slower machines. This helps to speed up the tests
   def wait_for_file_for_a_while file, time_to_wait