def test_save(self):
stbf = ScalingTimingBloomFilter(5, decay_time=30, ioloop=self.io_loop).start()
stbf += "hello"
assert "hello" in stbf
prev_num_nonzero = stbf.blooms[0]['bloom'].num_non_zero
stbf.tofile(open("test.stbf", "w+"))
with TestFile("test.stbf") as fd:
stbf2 = ScalingTimingBloomFilter.fromfile(fd)
assert "hello" in stbf
assert prev_num_nonzero == stbf2.blooms[0]['bloom'].num_non_zero
