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require_relative '../../spec_helper'
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
guard -> {
prio = Process.getpriority(Process::PRIO_USER, 0)
# The nice value is a value in the range -20 to 19.
# This test tries to change the nice value to +-1, so it cannot run if prio == -20 || prio == 19.
if -20 < prio && prio < 19
begin
# Check if we can lower the nice value or not.
#
# We are not always able to do it even as a root.
# Docker container is not always able to do it depending upon the configuration,
# which cannot know from the container itself.
Process.setpriority(Process::PRIO_USER, 0, prio - 1)
Process.setpriority(Process::PRIO_USER, 0, prio)
true
rescue Errno::EACCES
false
end
end
} do
it "sets the scheduling priority for a specified user" do
prio = Process.getpriority(Process::PRIO_USER, 0)
Process.setpriority(Process::PRIO_USER, 0, prio + 1).should == 0
Process.getpriority(Process::PRIO_USER, 0).should == (prio + 1)
Process.setpriority(Process::PRIO_USER, 0, prio).should == 0
end
end
end
end
end
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