Run in separate process/pgrp [Bug #13609]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/rubyspec/core/process/setpriority_spec.rb

@@ -4,18 +4,20 @@ describe "Process.setpriority" do
   # Needs a valid version written for Linux
   platform_is :darwin do
     it "sets the scheduling priority for a specified process" do
-      p = Process.getpriority(Process::PRIO_PROCESS, 0)
-      Process.setpriority(mock_int(Process::PRIO_PROCESS),
-                          mock_int(0),
-                          mock_int(p + 1)).should == 0
-      Process.getpriority(Process::PRIO_PROCESS, 0).should == (p + 1)
-      if Process.uid == 0
-        Process.setpriority(Process::PRIO_PROCESS, 0, p).should == 0
-      else
-        lambda {
-          Process.setpriority(Process::PRIO_PROCESS, 0, p)
-        }.should raise_error(Errno::EACCES)
+      priority = Process.getpriority(Process::PRIO_PROCESS, 0)
+      IO.popen('-') do |f|
+        if f
+          pr = Integer(f.gets)
+          Integer(f.gets).should == 0
+          Integer(f.gets).should == (pr+1)
+        else
+          pr = Process.getpriority(Process::PRIO_PROCESS, 0)
+          p pr
+          p Process.setpriority(Process::PRIO_PROCESS, 0, (pr + 1))
+          p Process.getpriority(Process::PRIO_PROCESS, 0)
+        end
       end
+      Process.getpriority(Process::PRIO_PROCESS, 0).should == priority
     end
   end
 
@@ -23,26 +25,21 @@ describe "Process.setpriority" do
   # whack with either permission errors or just the wrong value
   platform_is_not :darwin, :freebsd, :windows do
     it "sets the scheduling priority for a specified process group" do
-      pr = Process.getpriority(Process::PRIO_PGRP, 0)
-
-      Process.setpriority(Process::PRIO_PGRP, 0, pr + 1).should == 0
-      Process.getpriority(Process::PRIO_PGRP, 0).should == (pr + 1)
-      if Process.uid == 0
-        Process.setpriority(Process::PRIO_PGRP, 0, pr).should == 0
-      else
-        # EACCESS is not always raised. It's a stupid OS behavior.
-        ok = false
-        begin
-          Process.setpriority(Process::PRIO_PGRP, 0, pr)
-          ok = true
-        rescue Errno::EACCES
-          ok = true
-        rescue Object
-          ok = false
+      priority = Process.getpriority(Process::PRIO_PGRP, 0)
+      IO.popen('-') do |f|
+        if f
+          pr = Integer(f.gets)
+          Integer(f.gets).should == 0
+          Integer(f.gets).should == (pr+1)
+        else
+          Process.setpgrp
+          pr = Process.getpriority(Process::PRIO_PGRP, 0)
+          p pr
+          p Process.setpriority(Process::PRIO_PGRP, 0, pr + 1)
+          p Process.getpriority(Process::PRIO_PGRP, 0)
         end
-
-        ok.should == true
       end
+      Process.getpriority(Process::PRIO_PGRP, 0).should == priority
     end
   end