def test_check_int(self):
"""
Tests checking for an int in a set. This should fail.
"""
bf = cBloom.for_capacity(1000, 1e-4)
with pytest.raises(TypeError):
1234 in bf
def test_check_none(self):
"""
Tests checking None in a set. This should fail.
"""
bf = cBloom.for_capacity(1000, 1e-4)
with pytest.raises(TypeError):
None in bf
def test_add_int(self):
"""
Tests adding an int to a set. This should fail.
"""
bf = cBloom.for_capacity(1000, 1e-4)
with pytest.raises(TypeError):
bf.add(1234)
def test_add_none(self):
"""
Tests adding None to a set. This should fail.
"""
bf = cBloom.for_capacity(1000, 1e-4)
with pytest.raises(TypeError):
bf.add(None)
def test_length(self):
"""
Tests that length works
"""
bf = cBloom.for_capacity(1000, 1e-4)
assert len(bf) == 0
[bf.add("test%d" % x) for x in xrange(1000)]
assert len(bf) == 1000
def test_prob(self):
"""
Tests that the bloom filter is only wrong within
a certain threshold.
"""
# Only wrong once per hundred
bf = cBloom.for_capacity(1000, 0.01)
res = [bf.add("test%d" % x, True) for x in xrange(1000)]
num_wrong = len([x for x in res if x is False])
# Should get about 10 wrong
assert num_wrong >= 5
assert num_wrong <= 15
def test_for_capacity(self):
"""
Tests that the for_capacity method makes a sane bloom filter
using parameters that are generated for a given
capacity and probability are correct given known sane values.
"""
# From http://hur.st/bloomfilter?n=1e6&p=1e-4
bf = cBloom.for_capacity(1e6, 1e-4)
# Check the bitmap size
assert (len(bf.bitmap) / 8) - cBloom.extra_buffer() == round(19170117 / 8.0)
# Check the k num
assert bf.k_num == 14 # Parameters uses the ceiling instead of rounding
def test_add_without_check(self):
"""
Tests that adding to a bloom filter while checking
for existing entries works
"""
bf = cBloom.for_capacity(1000, 1e-4)
# Assert all adds work
assert all([bf.add("test%d" % x, False) for x in xrange(1000)])
assert all([bf.__contains__("test%d" % x) for x in xrange(1000)])
assert len(bf) == 1000
# Assert all adds work
assert all([bf.add("test%d" % x, False) for x in xrange(1000)])
assert len(bf) == 2000
