Add missing nsec test for 17f5d8e0

activesupport/test/core_ext/time_with_zone_test.rb

@@ -450,6 +450,11 @@ def test_usec_returns_sec_fraction_when_datetime_is_wrapped
     assert_equal 500000, twz.usec
   end
 
+  def test_nsec_returns_sec_fraction_when_datetime_is_wrapped
+    twz = ActiveSupport::TimeWithZone.new(DateTime.civil(2000, 1, 1, 0, 0, Rational(1,2)), @time_zone)
+    assert_equal 500000000, twz.nsec
+  end
+
   def test_utc_to_local_conversion_saves_period_in_instance_variable
     assert_nil @twz.instance_variable_get('@period')
     @twz.time