TEST(BloomFilterTest, NumEntriesAndFalsePositiveRate)
{
BloomFilter* bf = BloomFilter::for_num_entries_and_fp_prob(2, 0.0001);
bf->add("Kermit");
bf->add("MissPiggy");
EXPECT_TRUE(bf->check("Kermit"));
EXPECT_TRUE(bf->check("MissPiggy"));
EXPECT_FALSE(bf->check("Gonzo"));
EXPECT_FALSE(bf->check("Animal"));
delete bf; bf = nullptr;
}
int main() {
BloomFilter *s = new BloomFilter(4);
char c;
//cout<<"BLABLA";
Key k;
do {
cout<<"a - add\nf - find\nd - del\nq - quit\n";
cin>>c;
if (!(c!='a' || c!='f' || c!='d' || c!='q'))
continue;
cout<<"Value:\n";
cin>>k;
if(c=='a') {
s->add(k);
} else if(c == 'f') {
if((s->testExist(k, false)))
cout<<"Found!\n";
else
cout<<"Nod found!\n";
} else if(c == 'd') {
s->del(k);
} else {
break;
}
}while(c!='q');
cout<<"That's all, folks!\n";
return 0;
}
int main()
{
BloomFilter bf;
bf.add("hoge");
bf.add("fuga");
cout << (bf.exist("hoge") ? "true" : "false") << endl;
cout << (bf.exist("fuga") ? "true" : "false") << endl;
cout << (bf.exist("kuso") ? "true" : "false") << endl;
return 0;
}
int main(){
BloomFilter *bf = new BloomFilter(1024);
string st1 = "this";
string st2 = "is";
string st3 = "a";
string st4 = "test";
bf->add(st1.c_str(),st1.length());
bf->add(st2.c_str(),st2.length());
cout<<"bloom filter contains \""<<st1 <<"\"" <<":"<< bf->contains(st1.c_str(), st1.length()) << endl;
cout<<"bloom filter contains \""<<st2 <<"\"" <<":"<< bf->contains(st2.c_str(), st2.length()) << endl;
cout<<"bloom filter contains \""<<st3 <<"\"" <<":"<< bf->contains(st3.c_str(), st3.length()) << endl;
cout<<"bloom filter contains \""<<st4 <<"\"" <<":"<< bf->contains(st4.c_str(), st4.length()) << endl;
}
int
main()
{
BloomFilter<12, FilterChecker> *filter = new BloomFilter<12, FilterChecker>();
MOZ_RELEASE_ASSERT(filter);
FilterChecker one(1);
FilterChecker two(0x20000);
FilterChecker many(0x10000);
FilterChecker multiple(0x20001);
filter->add(&one);
MOZ_RELEASE_ASSERT(filter->mightContain(&one),
"Filter should contain 'one'");
MOZ_RELEASE_ASSERT(!filter->mightContain(&multiple),
"Filter claims to contain 'multiple' when it should not");
MOZ_RELEASE_ASSERT(filter->mightContain(&many),
"Filter should contain 'many' (false positive)");
filter->add(&two);
MOZ_RELEASE_ASSERT(filter->mightContain(&multiple),
"Filter should contain 'multiple' (false positive)");
// Test basic removals
filter->remove(&two);
MOZ_RELEASE_ASSERT(!filter->mightContain(&multiple),
"Filter claims to contain 'multiple' when it should not after two "
"was removed");
// Test multiple addition/removal
const size_t FILTER_SIZE = 255;
for (size_t i = 0; i < FILTER_SIZE - 1; ++i)
filter->add(&two);
MOZ_RELEASE_ASSERT(filter->mightContain(&multiple),
"Filter should contain 'multiple' after 'two' added lots of times "
"(false positive)");
for (size_t i = 0; i < FILTER_SIZE - 1; ++i)
filter->remove(&two);
MOZ_RELEASE_ASSERT(!filter->mightContain(&multiple),
"Filter claims to contain 'multiple' when it should not after two "
"was removed lots of times");
// Test overflowing the filter buckets
for (size_t i = 0; i < FILTER_SIZE + 1; ++i)
filter->add(&two);
MOZ_RELEASE_ASSERT(filter->mightContain(&multiple),
"Filter should contain 'multiple' after 'two' added lots more "
"times (false positive)");
for (size_t i = 0; i < FILTER_SIZE + 1; ++i)
filter->remove(&two);
MOZ_RELEASE_ASSERT(filter->mightContain(&multiple),
"Filter claims to not contain 'multiple' even though we should "
"have run out of space in the buckets (false positive)");
MOZ_RELEASE_ASSERT(filter->mightContain(&two),
"Filter claims to not contain 'two' even though we should have "
"run out of space in the buckets (false positive)");
filter->remove(&one);
MOZ_RELEASE_ASSERT(!filter->mightContain(&one),
"Filter should not contain 'one', because we didn't overflow its "
"bucket");
filter->clear();
MOZ_RELEASE_ASSERT(!filter->mightContain(&multiple),
"clear() failed to work");
return 0;
}
int main()
{
BloomFilter<12, FilterChecker> *filter = new BloomFilter<12, FilterChecker>();
FilterChecker one(1);
FilterChecker two(0x20000);
FilterChecker many(0x10000);
FilterChecker multiple(0x20001);
filter->add(&one);
if (!filter->mayContain(&one)) {
fail("Filter should contain 'one'");
return -1;
}
if (filter->mayContain(&multiple)) {
fail("Filter claims to contain 'multiple' when it should not");
return -1;
}
if (!filter->mayContain(&many)) {
fail("Filter should contain 'many' (false positive)");
return -1;
}
filter->add(&two);
if (!filter->mayContain(&multiple)) {
fail("Filter should contain 'multiple' (false positive)");
return -1;
}
// Test basic removals
filter->remove(&two);
if (filter->mayContain(&multiple)) {
fail("Filter claims to contain 'multiple' when it should not after two was "
"removed");
return -1;
}
// Test multiple addition/removal
const unsigned FILTER_SIZE = 255;
for (unsigned i = 0; i < FILTER_SIZE - 1; ++i) {
filter->add(&two);
}
if (!filter->mayContain(&multiple)) {
fail("Filter should contain 'multiple' after 'two' added lots of times "
"(false positive)");
return -1;
}
for (unsigned i = 0; i < FILTER_SIZE - 1; ++i) {
filter->remove(&two);
}
if (filter->mayContain(&multiple)) {
fail("Filter claims to contain 'multiple' when it should not after two was "
"removed lots of times");
return -1;
}
// Test overflowing the filter buckets
for (unsigned i = 0; i < FILTER_SIZE + 1; ++i) {
filter->add(&two);
}
if (!filter->mayContain(&multiple)) {
fail("Filter should contain 'multiple' after 'two' added lots more times "
"(false positive)");
return -1;
}
for (unsigned i = 0; i < FILTER_SIZE + 1; ++i) {
filter->remove(&two);
}
if (!filter->mayContain(&multiple)) {
fail("Filter claims to not contain 'multiple' even though we should have "
"run out of space in the buckets (false positive)");
return -1;
}
if (!filter->mayContain(&two)) {
fail("Filter claims to not contain 'two' even though we should have run "
"out of space in the buckets (false positive)");
return -1;
}
filter->remove(&one);
if (filter->mayContain(&one)) {
fail("Filter should not contain 'one', because we didn't overflow its "
"bucket");
return -1;
}
filter->clear();
if (filter->mayContain(&multiple)) {
fail("clear() failed to work");
return -1;
}
return 0;
}
