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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
# TODO: Intel C Compiler does not work this example
# http://rubyci.s3.amazonaws.com/icc-x64/ruby-master/log/20221013T030005Z.fail.html.gz
unless RbConfig::CONFIG['CC']&.include?("icx")
it "returns current cpu times" do
t = Process.times
user = t.utime
1 until Process.times.utime > user
Process.times.utime.should > user
end
end
# TODO: The precision of `getrusage` depends on platforms (OpenBSD
# seems not supporting under-milliseconds in fact); this example is
# very questionable as an example of Ruby, and it just repeats the
# guard condition.
guard -> do
1000.times.any? do
# If getrusage has precision beyond milliseconds, there will be
# very likely at least one non-zero microsecond results when
# repeating enough.
time = Process.clock_gettime(:GETRUSAGE_BASED_CLOCK_PROCESS_CPUTIME_ID, :nanosecond)
not (time % 1_000_000) == 0
end
rescue Errno::EINVAL
false
end do
it "uses getrusage when available to improve precision beyond milliseconds" do
max = 10_000
found = (max * 100).times.find do
time = Process.times.utime
!('%.6f' % time).end_with?('000')
end
found.should_not == nil
end
end
end
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