public void Murmur3FilterCheck()
{
BasicFilter filter = new BasicFilter(50, HashFunc.Murmur3);
foreach (string str in WordList)
{
filter.Insert(str);
}
foreach (string str in WordList)
{
Assert.True(filter.Check(str).Presence == BloomPresence.MightBeInserted);
}
// This was brute-forced not to be in the set
Assert.True(filter.Check("notInThere5").Presence == BloomPresence.NotInserted);
}
public void SHA512FilterCheck()
{
BasicFilter filter = new BasicFilter(50, HashFunc.SHA512);
foreach (string str in WordList)
{
filter.Insert(str);
}
foreach (string str in WordList)
{
Assert.True(filter.Check(str).Presence == BloomPresence.MightBeInserted);
}
// This was brute-forced not to be in the set
Assert.True(filter.Check("notInThere4").Presence == BloomPresence.NotInserted);
// This was brute-forced to have matching bits although it's not in the set
Assert.True(filter.Check("notInThere11").Presence == BloomPresence.MightBeInserted);
}
static void FilterCheck(BasicFilter filter, List<string> words)
{
var watch = new Stopwatch();
double p = 0.0;
foreach (string w in words)
{
var res = filter.Check(w);
p = res.Probability;
}
watch.Stop();
Console.WriteLine($"{filter.HashFunction}, k={filter.HashNumber}, {words.Count} checks: {(double)watch.ElapsedMilliseconds / 1000} sec with p={p}");
}
public void BasicFilterWithPrecalculatedProb()
{
BasicFilter filter = new BasicFilter(40000, 1.0E-7);
foreach (string str in WordList)
{
filter.Insert(str);
}
foreach (string str in WordList)
{
Assert.True(filter.Check(str).Presence == BloomPresence.MightBeInserted);
}
// This was brute-forced not to be in the set
Assert.True(filter.Check("notInThere4").Presence == BloomPresence.NotInserted);
// This is inside the set
FilterResult res = filter.Check("radioimmunoelectrophoresis");
Assert.True(res.Presence == BloomPresence.MightBeInserted);
Assert.True(res.Probability <= 1.0E-7);
}