public void TestPartitionedK()
{
var f = new PartitionedBloomFilter(100, 0.1);
var k = f.K();
Assert.AreEqual(4u, k);
}
public void TestPartitionedCapacity()
{
var f = new PartitionedBloomFilter(100, 0.1);
var capacity = f.Capacity();
Assert.AreEqual(480u, capacity);
}
public void TestPartitionedFillRatio()
{
var f = new PartitionedBloomFilter(100, 0.1);
f.Add(A_BYTES);
f.Add(B_BYTES);
f.Add(C_BYTES);
f.Add(X_BYTES);
var ratio = f.FillRatio();
Assert.AreEqual(0.03125, ratio);
}
public void TestPartitionedCount()
{
var f = new PartitionedBloomFilter(100, 0.1);
for (uint i = 0; i < 10; i++)
{
f.Add(Encoding.ASCII.GetBytes(i.ToString()));
}
var count = f.Count();
Assert.AreEqual(10u, count);
}
public void TestPartitionedEstimatedFillRatio()
{
var f = new PartitionedBloomFilter(100, 0.5);
for (uint i = 0; i < 100; i++)
{
f.Add(Encoding.ASCII.GetBytes(i.ToString()));
}
var ratio = f.EstimatedFillRatio();
if (ratio > 0.5)
{
Assert.Fail("Expected less than or equal to 0.5, got {0}", ratio);
}
}
public void BenchmarkPartitionedBloomTestAndAdd()
{
var n = 100000;
var f = new PartitionedBloomFilter(100000, 0.1);
var data = new byte[n][];
for (int i = 0; i < n; i++)
{
data[i] = Encoding.ASCII.GetBytes(i.ToString());
}
for (int i = 0; i < n; i++)
{
f.TestAndAdd(data[i]);
}
}
public void TestPartitionedBloomReset()
{
var f = new PartitionedBloomFilter(100, 0.1);
for (int i = 0; i < 1000; i++)
{
f.Add(Encoding.ASCII.GetBytes(i.ToString()));
}
var resetF = f.Reset();
Assert.AreSame(f, resetF, "Returned PartitionedBloomFilter should be the same instance");
foreach (var partition in f.Partitions)
{
for (uint i = 0; i < partition.count; i++)
{
if (partition.Get(0) != 0)
{
Assert.Fail("Expected all bits to be unset");
}
}
}
}
public void TestPartitionedBloomTestAndAdd()
{
var f = new PartitionedBloomFilter(100, 0.01);
// 'a' is not in the filter.
if (f.Test(A_BYTES))
{
Assert.Fail("'a' should not be a member");
}
var addedF = f.Add(A_BYTES);
Assert.AreSame(f, addedF, "Returned PartitionedBloomFilter should be the same instance");
// 'a' is now in the filter.
if (!f.Test(A_BYTES))
{
Assert.Fail("'a' should be a member");
}
// 'a' is still in the filter.
if (!f.TestAndAdd(A_BYTES))
{
Assert.Fail("'a' should be a member");
}
// 'b' is not in the filter.
if (f.TestAndAdd(B_BYTES))
{
Assert.Fail("'b' should not be a member");
}
// 'a' is still in the filter.
if (!f.Test(A_BYTES))
{
Assert.Fail("'a' should be a member");
}
// 'b' is now in the filter.
if (!f.Test(B_BYTES))
{
Assert.Fail("'b' should be a member");
}
// 'c' is not in the filter.
if (f.Test(C_BYTES))
{
Assert.Fail("'c' should not be a member");
}
for (int i = 0; i < 1000000; i++)
{
f.TestAndAdd(Encoding.ASCII.GetBytes(i.ToString()));
}
// 'x' should be a false positive.
if (!f.Test(X_BYTES))
{
Assert.Fail("'x' should be a member");
}
}
public void Serialize(Stream stream, PartitionedBloomFilter filter)
{
using (var bw = new BinaryWriter(stream))
{
bw.Write(DataFormatMajorVersion);
bw.Write(DataFormatMinorVersion);
PartitionedBloomState data = filter.GetState();
Serialize(bw, data);
bw.Flush();
}
}
