Update to ruby/spec@15c9619

1 files changed, 14 insertions, 1 deletions

diff --git a/spec/ruby/core/time/shared/now.rb b/spec/ruby/core/time/shared/now.rb
index c548be283f..80f66a1134 100644
--- a/spec/ruby/core/time/shared/now.rb
+++ b/spec/ruby/core/time/shared/now.rb
@@ -8,7 +8,7 @@ describe :time_now, shared: true do
 
   it "sets the current time" do
     now = TimeSpecs::MethodHolder.send(@method)
-    now.to_f.should be_close(Process.clock_gettime(Process::CLOCK_REALTIME), 10.0)
+    now.to_f.should be_close(Process.clock_gettime(Process::CLOCK_REALTIME), TIME_TOLERANCE)
   end
 
   it "uses the local timezone" do
@@ -17,4 +17,17 @@ describe :time_now, shared: true do
       now.utc_offset.should == (-8 * 60 * 60)
     end
   end
+
+  it "has at least microsecond precision" do
+    times = []
+    10_000.times do
+      times << Time.now.nsec
+    end
+
+    # The clock should not be less accurate than expected (times should
+    # not all be a multiple of the next precision up, assuming precisions
+    # are multiples of ten.)
+    expected = 1_000
+    times.select { |t| t % (expected * 10) == 0  }.size.should_not == times.size
+  end
 end