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