def test_daterange_bug_456(self):
# GH #456
rng1 = DateRange('12/5/2011', '12/5/2011')
rng2 = DateRange('12/2/2011', '12/5/2011')
rng2.offset = datetools.BDay()
result = rng1.union(rng2)
self.assert_(type(result) == DateRange)
