redirecting some ugly output when running tests

test/master_test.rb

@@ -202,6 +202,7 @@ class MasterTest < Test::Unit::TestCase
 
     context "running a local worker" do
       setup do
+        capture_stderr do # redirect stderr
           @pid = Process.fork do
             Hydra::Master.new(
                               :files => [test_file] * 6,
@@ -212,6 +213,7 @@ class MasterTest < Test::Unit::TestCase
                               )
           end
         end
+      end
 
       should "run runner_end on successful termination" do
         Process.waitpid @pid
@@ -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
@@ -235,6 +239,7 @@ 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
+        capture_stderr do # redirect stderr
           @pid = Process.fork do
             Hydra::Master.new(
                               :files => [test_file] * 6,
@@ -251,6 +256,7 @@ class MasterTest < Test::Unit::TestCase
                               )
           end
         end
+      end
 
       teardown do
         FileUtils.rm_f(@remote_init_file) unless @protect_init_file

test/runner_test.rb

@@ -80,6 +80,7 @@ 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
+      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)
@@ -95,6 +96,7 @@ class RunnerTest < Test::Unit::TestCase
         end
         Process.wait pid
       end
+    end
 
     should "be able to run a runner over ssh" do
       send_file_to_ssh_runner_and_verify_completion

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