diff options
Diffstat (limited to 'spec/ruby/core/process/times_spec.rb')
-rw-r--r-- | spec/ruby/core/process/times_spec.rb | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/spec/ruby/core/process/times_spec.rb b/spec/ruby/core/process/times_spec.rb index 07b4fa5c9f..f148954262 100644 --- a/spec/ruby/core/process/times_spec.rb +++ b/spec/ruby/core/process/times_spec.rb @@ -7,21 +7,19 @@ describe "Process.times" do it "returns current cpu times" do t = Process.times + user = t.utime - # Do busy work for a wall-clock interval. - start = Time.now - 1 until (Time.now - start) > 0.5 + 1 until Process.times.utime > user + Process.times.utime.should > user + end - # Ensure times is larger. NOTE that there is no - # guarantee of an upper bound since anything may be - # happening at the OS level, so we ONLY check that at - # least an interval has elapsed. Also, we are assuming - # there is a correlation between wall clock time and - # process time. In practice, there is an observed - # discrepancy often 10% or greater. In other words, - # this is a very fuzzy test. - t2 = Process.times - diff = (t2.utime + t2.stime) - (t.utime + t.stime) - diff.should > 0 + ruby_version_is "2.5" do + platform_is_not :windows do + it "uses getrusage when available to improve precision beyond milliseconds" do + times = 100.times.map { Process.times } + times.count { |t| ((t.utime * 1e6).to_i % 1000) > 0 }.should > 0 + times.count { |t| ((t.stime * 1e6).to_i % 1000) > 0 }.should > 0 + end + end end end |