1 files changed, 37 insertions, 0 deletions
diff --git a/spec/ruby/core/process/setpgrp_spec.rb b/spec/ruby/core/process/setpgrp_spec.rb
new file mode 100644
index 0000000000..8e72795f96
--- /dev/null
+++ b/spec/ruby/core/process/setpgrp_spec.rb
@@ -0,0 +1,37 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+# TODO: put these in the right files.
+describe "Process.setpgrp and Process.getpgrp" do
+  platform_is_not :windows do
+    it "sets and gets the process group ID of the calling process" do
+      # there are two synchronization points here:
+      # One for the child to let the parent know that it has finished
+      #   setting its process group;
+      # and another for the parent to let the child know that it's ok to die.
+      read1, write1 = IO.pipe
+      read2, write2 = IO.pipe
+      pid = Process.fork do
+        read1.close
+        write2.close
+        Process.setpgrp
+        write1 << Process.getpgrp
+        write1.close
+        read2.read(1)
+        read2.close
+        Process.exit!
+      end
+      write1.close
+      read2.close
+      pgid = read1.read # wait for child to change process groups
+      read1.close
+
+      begin
+        Process.getpgid(pid).should == pgid.to_i
+      ensure
+        write2 << "!"
+        write2.close
+        Process.wait pid
+      end
+    end
+  end
+end