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test_bloom.py
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test_bloom.py
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# -*- coding: utf-8 -*-
from fastbloom_rs import BloomFilter, FilterBuilder
import os
def test_bloom_builder():
bloom = BloomFilter(100_000_000, 0.01)
bloom.add_bytes(b'hello')
bloom.add(87)
assert bloom.contains_bytes(b'hello')
assert bloom.contains('hello')
assert bloom.contains_int(87)
assert bloom.contains(87)
assert b'hello' in bloom
assert not bloom.contains_bytes(b'hello world')
assert not bloom.add_if_not_contains('hello2')
assert bloom.contains('hello2')
assert not bloom.add_if_not_contains(88)
assert bloom.contains(88)
bloom2 = BloomFilter.from_int_array(bloom.get_int_array(), bloom.hashes())
assert bloom2.contains_bytes(b'hello')
assert bloom2.contains('hello')
assert bloom2.contains_int(87)
assert bloom2.contains(87)
assert b'hello' in bloom2
assert not bloom2.contains_bytes(b'hello world')
bloom3 = BloomFilter.from_bytes(bloom.get_bytes(), bloom.hashes())
assert bloom3.contains_bytes(b'hello')
assert bloom3.contains('hello')
assert bloom3.contains_int(87)
assert bloom3.contains(87)
assert b'hello' in bloom3
assert not bloom3.contains_bytes(b'hello world')
builder = FilterBuilder(100_000_000, 0.01)
bloom4 = builder.build_bloom_filter()
bloom4.add_bytes(b'hello')
bloom4.add(87)
assert bloom4.contains_bytes(b'hello')
assert bloom4.contains('hello')
assert bloom4.contains_int(87)
assert bloom4.contains(87)
assert b'hello' in bloom4
assert not bloom4.contains_bytes(b'hello world')
def test_bloom_add():
bloom = BloomFilter(100_000_000, 0.01)
for data in range(0, 10_000_000):
bloom.add_int(data)
for data in range(0, 10_000_000):
assert data in bloom
assert not (1000_000_000 in bloom)
assert not ('hello' in bloom)
def test_bloom_estimate_set_cardinality():
bloom = BloomFilter(100_000_000, 0.01)
for data in range(0, 10_000_000):
bloom.add_int(data)
assert (bloom.estimate_set_cardinality() < 10_100_000) and (
bloom.estimate_set_cardinality() > 9_900_000)
def test_bloom_op():
bloom = BloomFilter(100_000_000, 0.001)
bloom.add_bytes(b'hello')
bloom.add(87)
assert b'hello' in bloom
assert 87 in bloom
bloom.clear()
assert not (b'hello' in bloom)
assert not (87 in bloom)
def test_bloom_union():
bloom = BloomFilter(100_000_000, 0.01)
bloom.add_bytes(b'hello')
assert bloom.contains_bytes(b'hello')
assert not bloom.contains(87)
bloom2 = BloomFilter(100_000_000, 0.01)
bloom2.add(87)
assert not bloom2.contains_bytes(b'hello')
assert bloom2.contains(87)
bloom.union(bloom2)
assert bloom.contains_bytes(b'hello')
assert bloom.contains(87)
def test_bloom_intersect():
bloom = BloomFilter(100_000_000, 0.01)
bloom.add_bytes(b'hello')
bloom.add(87)
assert bloom.contains_bytes(b'hello')
assert bloom.contains(87)
bloom2 = BloomFilter(100_000_000, 0.01)
bloom2.add(87)
assert not bloom2.contains_bytes(b'hello')
assert bloom2.contains(87)
bloom.intersect(bloom2)
assert not bloom.contains_bytes(b'hello')
assert bloom.contains(87)
def test_hash_indices():
bloom = BloomFilter(100_000_000, 0.01)
bloom.add_bytes(b'hello')
bloom.add_str("world")
bloom.add(87)
bloom2 = BloomFilter(100_000_000, 0.01)
bloom2.add_str("Yan Kun")
assert bloom.get_hash_indices(
b'hello') == bloom2.get_hash_indices(b'hello')
assert bloom.contains_hash_indices(bloom.get_hash_indices(b'hello'))
assert bloom.contains_hash_indices(bloom.get_hash_indices(87))
assert bloom.contains_hash_indices(bloom.get_hash_indices("world"))
assert not bloom.contains_hash_indices(bloom.get_hash_indices("Yan Kun"))
assert not bloom2.contains_hash_indices(bloom2.get_hash_indices(b'hello'))
assert not bloom2.contains_hash_indices(bloom2.get_hash_indices(87))
assert not bloom2.contains_hash_indices(bloom2.get_hash_indices("world"))
assert bloom2.contains_hash_indices(bloom2.get_hash_indices("Yan Kun"))
def test_batch_check():
bloom = BloomFilter(100_000_000, 0.01)
inserts = [1, 2, 3, 4, 5, 6, 7, 9, 18, 68, 90, 100]
checks = [1, 2, 3, 4, 5, 6, 7, 9, 18, 68, 90, 100, 190, 290, 390]
results = [True, True, True, True, True, True, True,
True, True, True, True, True, False, False, False]
bloom.add_int_batch(inserts)
contains = bloom.contains_int_batch(checks)
assert contains == results
bloom.add_str_batch(list(map(lambda x: str(x), inserts)))
assert bloom.contains_str_batch(
list(map(lambda x: str(x), checks))) == results
bloom.add_bytes_batch(list(map(lambda x: bytes(x), inserts)))
assert bloom.contains_bytes_batch(
list(map(lambda x: bytes(x), checks))) == results
def test_save_load_hashes_file():
bloom = BloomFilter(1_000_000_000, 0.0001)
bloom.add_bytes(b'hello')
bloom.add(87)
assert bloom.contains_bytes(b'hello')
assert bloom.contains_int(87)
assert not bloom.contains('world')
bloom.save_to_file_with_hashes('fst.bloom')
del bloom # gc
bloom = BloomFilter.from_file_with_hashes('fst.bloom')
assert bloom.contains_bytes(b'hello')
assert bloom.contains_int(87)
assert not bloom.contains('world')
os.remove('fst.bloom')
def test_save_load_file():
hashes = 0
bloom = BloomFilter(1_000_000_000, 0.01)
bloom.add_bytes(b'hello')
bloom.add(87)
hashes = bloom.hashes()
assert bloom.contains_bytes(b'hello')
assert bloom.contains_int(87)
assert not bloom.contains('world')
bloom.save_to_file('fst.bloom')
del bloom # gc
bloom = BloomFilter.from_file('fst.bloom', hashes)
assert bloom.contains_bytes(b'hello')
assert bloom.contains_int(87)
assert not bloom.contains('world')
os.remove('fst.bloom')