コード例 #1
0
        public void HybridFalsePositiveTest()
        {
            var addSize       = 10000;
            var testData      = DataGenerator.Generate().Take(addSize).ToArray();
            var errorRate     = 0.001F;
            var size          = testData.Length;
            var configuration = new HybridDefaultBloomFilterConfiguration();
            var bloomFilter   = new InvertibleHybridBloomFilter <TestEntity, long, sbyte>(configuration);

            bloomFilter.Initialize(size, errorRate);
            foreach (var itm in testData)
            {
                bloomFilter.Add(itm);
            }
            var notFoundCount = testData.Count(itm => !bloomFilter.Contains(itm));

            Assert.IsTrue(notFoundCount == 0, "False negative error rate violated");
            notFoundCount = testData.Count(itm => !bloomFilter.ContainsKey(itm.Id));
            Assert.IsTrue(notFoundCount == 0, "False negative error rate violated on ContainsKey");
            notFoundCount = DataGenerator.Generate().Skip(addSize).Take(addSize).Count(itm => bloomFilter.Contains(itm));
            Assert.IsTrue(notFoundCount <= errorRate * addSize, "False positive error rate violated");
            notFoundCount = DataGenerator.Generate().Skip(addSize).Take(addSize).Count(itm => bloomFilter.ContainsKey(itm.Id));
            Assert.IsTrue(notFoundCount <= errorRate * addSize, "False positive error rate violated on ContainsKey");
        }