* test/testunit/test_parallel.rb(test_ignore_tzero): Test for r32109.

* test/testunit/tests_for_parallel/test_third.rb: Use another way to
  detect that test is running on worker. This fixes sometimes
  TestParallel failing.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32110 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/testunit/test_parallel.rb

@@ -140,8 +140,15 @@ module TestParallel
       end
     end
 
-    #def test_childs
-    #end
+    def test_ignore_jzero
+      @test_out, o = IO.pipe
+      @test_pid = spawn(*@options[:ruby], TESTS+"/runner.rb",
+                        "-j","0", out: File::NULL, err: o)
+      o.close
+      timeout(10) {
+        assert_match(/Error: parameter of -j option should be greater than 0/,@test_out.read)
+      }
+    end
 
     def test_should_run_all_without_any_leaks
       spawn_runner