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Diffstat (limited to 'spec/ruby/core/process/times_spec.rb')
-rw-r--r-- | spec/ruby/core/process/times_spec.rb | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/core/process/times_spec.rb b/spec/ruby/core/process/times_spec.rb new file mode 100644 index 0000000000..01a5595ef9 --- /dev/null +++ b/spec/ruby/core/process/times_spec.rb @@ -0,0 +1,27 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Process.times" do + it "returns a Struct::Tms" do + Process.times.should be_kind_of(Struct::Tms) + end + + it "returns current cpu times" do + t = Process.times + + # Do busy work for a wall-clock interval. + start = Time.now + 1 until (Time.now - start) > 0.5 + + # 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 + end +end |