1 files changed, 41 insertions, 0 deletions
diff --git a/spec/ruby/core/process/setpriority_spec.rb b/spec/ruby/core/process/setpriority_spec.rb
new file mode 100644
index 0000000000..7b437a547a
--- /dev/null
+++ b/spec/ruby/core/process/setpriority_spec.rb
@@ -0,0 +1,41 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Process.setpriority" do
+  platform_is_not :windows do
+    it "sets the scheduling priority for a specified process" do
+      priority = Process.getpriority(Process::PRIO_PROCESS, 0)
+
+      out = ruby_exe(fixture(__FILE__, "setpriority.rb"), args: "process")
+      out = out.lines.map { |l| Integer(l) }
+      pr = out[0]
+      out.should == [pr, 0, pr+1]
+
+      Process.getpriority(Process::PRIO_PROCESS, 0).should == priority
+    end
+
+    # Darwin and FreeBSD don't seem to handle these at all, getting all out of
+    # whack with either permission errors or just the wrong value
+    platform_is_not :darwin, :freebsd do
+      it "sets the scheduling priority for a specified process group" do
+        priority = Process.getpriority(Process::PRIO_PGRP, 0)
+
+        out = ruby_exe(fixture(__FILE__, "setpriority.rb"), args: "group")
+        out = out.lines.map { |l| Integer(l) }
+        pr = out[0]
+        out.should == [pr, 0, pr+1]
+
+        Process.getpriority(Process::PRIO_PGRP, 0).should == priority
+      end
+    end
+
+    as_superuser do
+      it "sets the scheduling priority for a specified user" do
+        p = Process.getpriority(Process::PRIO_USER, 0)
+        Process.setpriority(Process::PRIO_USER, 0, p + 1).should == 0
+        Process.getpriority(Process::PRIO_USER, 0).should == (p + 1)
+        Process.setpriority(Process::PRIO_USER, 0, p).should == 0
+      end
+    end
+  end
+
+end