spec/ruby/core/process/times_spec.rb


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require_relative '../../spec_helper'

describe "Process.times" do
  it "returns a Process::Tms" do
    Process.times.should be_kind_of(Process::Tms)
  end

  it "returns current cpu times" do
    t = Process.times
    user = t.utime

    1 until Process.times.utime > user
    Process.times.utime.should > user
  end

  platform_is_not :windows do
    it "uses getrusage when available to improve precision beyond milliseconds" do
      max = 10_000
      has_getrusage = max.times.find do
        time = Process.clock_gettime(:GETRUSAGE_BASED_CLOCK_PROCESS_CPUTIME_ID)
        ('%.6f' % time).end_with?('000')
      end
      unless has_getrusage
        skip "getrusage is not supported on this environment"
      end

      found = (max * 100).times.find do
        time = Process.times.utime
        ('%.6f' % time).end_with?('000')
      end

      found.should_not == nil
    end
  end
end