public void BloomFilter_DoesNotContain_ShouldDetectUncontained()
{
filter.Add("foo");
filter.Add("bar");
Assert.IsTrue(filter.DoesNotContain("foobar"));
}
public void BloomFilterAddDifferentSizesTest()
{
var addSize = 10000;
var testData = DataGenerator.Generate().Take(addSize).ToArray();
var testData2 = DataGenerator.Generate().Skip(addSize).Take(addSize).ToArray();
var errorRate = 0.001F;
var size = testData.Length;
var configuration = new DefaultBloomFilterConfiguration();
var bloomFilter = new BloomFilter <TestEntity, long>(configuration);
bloomFilter.Initialize(4 * size, errorRate);
foreach (var itm in testData)
{
bloomFilter.Add(itm);
}
var bloomFilter2 = new BloomFilter <TestEntity, long>(configuration);
//We have to create a foldable version.
var data = bloomFilter.Extract();
var foldFactor = configuration.FoldingStrategy.GetAllFoldFactors(data.BlockSize).Where(f => f > 1).OrderBy(f => f).First();
bloomFilter2.Initialize(addSize, data.BlockSize / foldFactor, data.HashFunctionCount);
foreach (var itm in testData2)
{
bloomFilter2.Add(itm);
}
bloomFilter.Add(bloomFilter2);
var contained = testData.Union(testData2).Count(item => bloomFilter.Contains(item));
Assert.AreEqual(2 * addSize, contained, "Not all items found in added Bloom filters");
}
public void AddMultipleDifferentItemsToBloomTest()
{
BloomConfiguration config = new BloomConfiguration {
BloomFilterSize = 8 * (long)BloomFilterSizeMultipliers.Bits,
};
BloomFilter bloomFilter = new BloomFilter(config);
string testString = $"TestString";
byte[] testByteArray1 = Encoding.ASCII.GetBytes(testString);
string testString2 = $"TestString2";
byte[] testByteArray2 = Encoding.ASCII.GetBytes(testString2);
bloomFilter.Add(testByteArray1);
bloomFilter.Add(testByteArray2);
bool[] actual = bloomFilter.Filter;
bool[] expected = { true, false, true, true, false, true, false, true };
Assert.True(CompareBoolArrays(expected, actual));
Assert.True(bloomFilter.Contains(testByteArray1));
Assert.True(bloomFilter.Contains(testByteArray2));
}
public void TestAddTen()
{
var filter = new BloomFilter(32);
filter.Add(s0);
filter.Add(s1);
filter.Add(s2);
filter.Add(s3);
filter.Add(s4);
filter.Add(s5);
filter.Add(s6);
filter.Add(s7);
filter.Add(s8);
filter.Add(s9);
Assert.True(filter.IsValue(s0) == true);
Assert.True(filter.IsValue(s1) == true);
Assert.True(filter.IsValue(s2) == true);
Assert.True(filter.IsValue(s3) == true);
Assert.True(filter.IsValue(s4) == true);
Assert.True(filter.IsValue(s5) == true);
Assert.True(filter.IsValue(s6) == true);
Assert.True(filter.IsValue(s7) == true);
Assert.True(filter.IsValue(s8) == true);
Assert.True(filter.IsValue(s9) == true);
Assert.True(filter.IsValue("awdfbswer0") == false);
int a = 0;
}
public static void TestsIsValue()
{
var testFilter = new BloomFilter(32);
Assert.AreEqual(32, testFilter.bitArray.Length);
Assert.AreEqual(32, testFilter.filter_len);
testFilter.Add(zero);
testFilter.Add(one);
for (int i = 0; i < testFilter.filter_len; i++)
{
if (i == 5 || i == 13 || i == 27 || i == 29)
{
Assert.IsTrue(testFilter.bitArray[i] == true);
}
else
{
Assert.IsTrue(testFilter.bitArray[i] == false);
}
}
Assert.IsTrue(testFilter.IsValue(zero));
Assert.IsTrue(testFilter.IsValue(one));
Assert.IsTrue(testFilter.IsValue(two));
Assert.IsTrue(testFilter.IsValue(three));
Assert.IsTrue(testFilter.IsValue(four));
Assert.IsTrue(testFilter.IsValue(five));
Assert.IsTrue(testFilter.IsValue(six));
Assert.IsTrue(testFilter.IsValue(seven));
Assert.IsTrue(testFilter.IsValue(eigth));
Assert.IsTrue(testFilter.IsValue(nine));
}
public void TestTest()
{
int m = 7, n = 10;
uint nTweak = 123456;
BloomFilter filter = new BloomFilter(m, n, nTweak);
Transaction tx = new Transaction
{
Script = TestUtils.GetByteArray(32, 0x42),
SystemFee = 4200000000,
Signers = new Signer[] { new Signer()
{
Account = (new byte[0]).ToScriptHash()
} },
Attributes = Array.Empty <TransactionAttribute>(),
Witnesses = new[]
{
new Witness
{
InvocationScript = new byte[0],
VerificationScript = new byte[0]
}
}
};
filter.Test(tx).Should().BeFalse();
filter.Add(tx.Witnesses[0].ScriptHash.ToArray());
filter.Test(tx).Should().BeTrue();
filter.Add(tx.Hash.ToArray());
filter.Test(tx).Should().BeTrue();
}
public void TestBit_4()
{
BloomFilter filter = new BloomFilter(32);
filter.Add("0123456789");
filter.Add("1234567890");
filter.Add("2345678901");
filter.Add("3456789012");
filter.Add("4567890123");
filter.Add("5678901234");
filter.Add("6789012345");
filter.Add("7890123456");
filter.Add("8901234567");
filter.Add("9012345678");
Assert.AreEqual(true, filter.IsValue("0123456789"));
Assert.AreEqual(true, filter.IsValue("1234567890"));
Assert.AreEqual(true, filter.IsValue("2345678901"));
Assert.AreEqual(true, filter.IsValue("3456789012"));
Assert.AreEqual(true, filter.IsValue("4567890123"));
Assert.AreEqual(true, filter.IsValue("5678901234"));
Assert.AreEqual(true, filter.IsValue("6789012345"));
Assert.AreEqual(true, filter.IsValue("7890123456"));
Assert.AreEqual(true, filter.IsValue("8901234567"));
Assert.AreEqual(true, filter.IsValue("9012345678"));
}
public void TestTest()
{
int m = 7, n = 10;
uint nTweak = 123456;
BloomFilter filter = new BloomFilter(m, n, nTweak);
Transaction tx = new Transaction
{
Script = TestUtils.GetByteArray(32, 0x42),
Sender = UInt160.Zero,
SystemFee = 4200000000,
Attributes = new TransactionAttribute[0],
Cosigners = new Cosigner[0],
Witnesses = new[]
{
new Witness
{
InvocationScript = new byte[0],
VerificationScript = new byte[0]
}
}
};
filter.Test(tx).Should().BeFalse();
filter.Add(tx.Witnesses[0].ScriptHash.ToArray());
filter.Test(tx).Should().BeTrue();
filter.Add(tx.Hash.ToArray());
filter.Test(tx).Should().BeTrue();
}
public void BloomFilterAddTest()
{
var addSize = 10000;
var testData = DataGenerator.Generate().Take(addSize).ToArray();
var testData2 = DataGenerator.Generate().Skip(addSize).Take(addSize).ToArray();
var errorRate = 0.001F;
var size = testData.Length;
var configuration = new DefaultBloomFilterConfiguration();
var bloomFilter = new BloomFilter <TestEntity, long>(configuration);
bloomFilter.Initialize(2 * size, errorRate);
foreach (var itm in testData)
{
bloomFilter.Add(itm);
}
var bloomFilter2 = new BloomFilter <TestEntity, long>(configuration);
bloomFilter2.Initialize(2 * size, errorRate);
foreach (var itm in testData2)
{
bloomFilter2.Add(itm);
}
bloomFilter.Add(bloomFilter2);
var contained = testData.Union(testData2).Count(item => bloomFilter.ContainsKey(item.Id));
Assert.AreEqual(contained, 2 * addSize, "Not all items found in added Bloom filters");
}
public WellUsedBloomFilterTest()
{
Subject = new BloomFilter();
Subject.Add("foo");
Subject.Add("bar");
Subject.Add("baz");
Subject.Add("qux");
}
public void SettingInit()//进行Settings.SeedsAddress Settings.HrefKeywords urlFilterKeyWord 基础设定
{
//webClient.DownloadFileCompleted += WebClient_DownloadFileCompleted;
//种子地址需要加布隆过滤
//Settings.Depth = 4;
//代理ip模式
Settings.IPProxyList = new List <IPProxy>();
Settings.IgnoreSucceedUrlToDB = true;//不添加地址到数据库
Settings.MaxReTryTimes = 20;
Settings.ThreadCount = 1;
Settings.Accept = "application/json, text/plain, */*";
// Settings.ContentType = "application/x-www-form-urlencoded";
Settings.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36";
Settings.HeadSetDic = new Dictionary <string, string>();
Settings.HeadSetDic.Add("Accept-Encoding", "gzip, deflate, br");
//Settings.UseSuperWebClient = true;
//Settings.hi = new HttpInput();
//HttpManager.Instance.InitWebClient(Settings.hi, true, 30, 30);
Console.WriteLine("正在获取已存在的url数据");
//布隆url初始化,防止重复读取url
Console.WriteLine("正在初始化选择url队列");
//Settings.SimulateCookies = "serviceToken=rcu+GfCMDhx4ZCDJLkqDU3/2m8d3M3zMS0UfygZTLjHh0Pc1ch+8xHq9RcoydhhNhFpUIzLU+dE/QTFqlBNxUMxmE1Zm6Le0D5+Ued9T9M/4tRwfTIaqhcthlNd4mbjUOKcQmLv1Sl/mBIk7nYgGwC4wjcKOWoqhyScI3v/P63KN6/tHny5ukDe8nu4VfkLYty8g1R/J1xTzpeUe8Eua9pqnp8RfJxaijBkkXDc5CLCZieq2/Jdw7E1pbUUIMyaLLkGPX2qIr1PWV7k8hVi8Pg==; userId=86746990; jiamitu_slh=m+6hSHbUeRXZg+u7iCPkZycZ+Bs=; jiamitu_ph=iYZ5flgCd0IjNWfZk3N+Xw==; Hm_lvt_08ad038db088bb26c69084e80bc70125=1529372392,1529372396; Hm_lpvt_08ad038db088bb26c69084e80bc70125=1531119965";
var allCount = 697591;
var allPage = (allCount / takeCount) + 1;
//foreach (var region in regionList)
{
for (var pageIndex = 1; pageIndex <= 1; pageIndex++)
{
//https://jiamitu.mi.com/pet/data/list?page=1&limit=10&order=rare_degree&orderBy=desc&followUp=https:%2F%2Fjiamitu.mi.com%2Fhome
var url = string.Format("https://jiamitu.mi.com/pet/data/list?page={0}&limit=10&order=generated_id&orderBy=desc&followUp=https:%2F%2Fjiamitu.mi.com%2Fhome%23", pageIndex, takeCount);
if (!filter.Contains(url))//详情添加
{
filter.Add(url);
UrlQueue.Instance.EnQueue(new UrlInfo(url)
{
Depth = 1
});
}
}
}
//Settings.SeedsAddress.Add(string.Format("http://fdc.fang.com/data/land/CitySelect.aspx"));
Settings.RegularFilterExpressions.Add("XXX");//不添加其他
if (SimulateLogin())
{
// Console.WriteLine("zluckymn模拟登陆成功");
}
else
{
Console.WriteLine("初始化失败");
}
}
public void Run()
{
if (!test.Contains("1234"))
{
test.Add("1234");
}
iplist.Add(new proxy(Guid.NewGuid().ToString(), "1234", 2));
System.IO.File.AppendAllTextAsync("d:\\freeIP.txt", $"{DateTime.Now.ToString()}{Environment.NewLine}");
}
public void SettingInit()//进行Settings.SeedsAddress Settings.HrefKeywords urlFilterKeyWord 基础设定
{
//种子地址需要加布隆过滤
//Settings.Depth = 4;
//代理ip模式
//Settings.IPProxyList =IPProxyHelper.GetIpProxyList("2");
//var ipProxyList = dataop.FindAllByQuery("IPProxy", Query.NE("status", "1")).ToList();
// Settings.IPProxyList.AddRange(ipProxyList.Select(c => new IPProxy(c.Text("ip"))).Distinct());
// Settings.IPProxyList.Add(new IPProxy("1.209.188.180:8080"));
Settings.IgnoreSucceedUrlToDB = true;
Settings.ThreadCount = 2;
Settings.DBSaveCountLimit = 1;
Settings.MaxReTryTimes = 10;
Settings.IgnoreFailUrl = true;
//Settings.AutoSpeedLimit = true;
//Settings.AutoSpeedLimitMaxMSecond = 1000;
//Settings.CurWebProxy = GetWebProxy();
Settings.AccessToken = reqtoken;
Settings.ContentType = "application/x-www-form-urlencoded";
this.Settings.UserAgent = "haodf_app/1.0";
Settings.PostEncoding = Encoding.UTF8;
var allDoctorList = dataop.FindAllByQuery(DataTableNameDoctor, Query.NE("isScheduleUpdate", "1")).SetFields("guid").ToList();
foreach (var doctor in allDoctorList)//法庭
{
var postData = string.Format("app=p&os=android&n=2&m=GT-I9300&v=5.2.5&di={0}&s=hd&doctorId={1}&deviceToken={0}&p=1&userId=0¤tUserId=0&sv=4.4.2&api=1.2", reqtoken, doctor.Text("guid"));
UrlQueue.Instance.EnQueue(new UrlInfo(materialUrl)
{
Depth = 1, PostData = postData
});
if (!guidFilter.Contains(doctor.Text("guid")))
{
guidFilter.Add(doctor.Text("guid"));
}
}
//var testUrl = "http://z.hc360.com/getmmtlast.cgi?dt=1&w=外墙面砖&v=59&e=100&c=供应信息&n=3101&m=2&H=1&bt=0";
//var testAuthorization = appHelper.GetHuiCongAuthorizationCode(testUrl);
//UrlQueue.Instance.EnQueue(new UrlInfo(testUrl) { Depth = 1, Authorization = testAuthorization });
Console.WriteLine("正在加载账号数据");
//Settings.HrefKeywords.Add(string.Format("/market/"));//先不加其他的
//Settings.HrefKeywords.Add(string.Format("data/land/_________0_"));//先不加其他的
//是否guid
//不进行地址爬取
Settings.RegularFilterExpressions.Add(@"luckymnXXXXXXXXXXXXXXXXXX");
if (SimulateLogin())
{
// Console.WriteLine("zluckymn模拟登陆成功");
}
else
{
Console.WriteLine("模拟登陆失败");
}
}
public void SettingInit()//进行Settings.SeedsAddress Settings.HrefKeywords urlFilterKeyWord 基础设定
{
//webClient.DownloadFileCompleted += WebClient_DownloadFileCompleted;
//种子地址需要加布隆过滤
//Settings.Depth = 4;
//代理ip模式
Settings.IPProxyList = new List <IPProxy>();
Settings.IgnoreSucceedUrlToDB = true;//不添加地址到数据库
Settings.MaxReTryTimes = 20;
Settings.ThreadCount = 10;
Settings.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8";
Settings.ContentType = "application/x-www-form-urlencoded";
Settings.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36";
Settings.HeadSetDic = new Dictionary <string, string>();
Settings.HeadSetDic.Add("Accept-Encoding", "gzip, deflate");
//Settings.UseSuperWebClient = true;
//Settings.hi = new HttpInput();
//HttpManager.Instance.InitWebClient(Settings.hi, true, 30, 30);
Console.WriteLine("正在获取已存在的url数据");
//布隆url初始化,防止重复读取url
Console.WriteLine("正在初始化选择url队列");
Settings.SimulateCookies = "UM_distinctid=163c909dac3a0b-0a58055a844938-737356c-13c680-163c909dac46fa; JSESSIONID=0000uekkAKP_Q0hcDP33LrLYCY5:-1; CNZZDATA4237675=cnzz_eid%3D1374545162-1528085523-null%26ntime%3D1528091007";
var regionList = dataop.FindAll(DataTableNameRegion).ToList();
var typeList = dataop.FindAll(DataTableNameType).ToList();
var region = new BsonDocument();
var type = new BsonDocument();
//foreach (var region in regionList)
{
// foreach (var type in typeList)
{
var url = string.Format("http://www.jyfcc.com.cn/PreSellCert_List.do?region={0}&type={1}", region.Text("name"), type.Text("name"));
var postData = string.Format("region={0}&hsusage={1}&project=&developer=&button=%B2%E9%D1%AF", region.Text("id"), type.Text("id"));
if (!filter.Contains(url))//详情添加
{
filter.Add(url);
UrlQueue.Instance.EnQueue(new UrlInfo(url)
{
Depth = 1, PostData = postData
});
}
}
}
//Settings.SeedsAddress.Add(string.Format("http://fdc.fang.com/data/land/CitySelect.aspx"));
Settings.RegularFilterExpressions.Add("XXX");//不添加其他
if (SimulateLogin())
{
// Console.WriteLine("zluckymn模拟登陆成功");
}
else
{
Console.WriteLine("初始化失败");
}
}
public void TestBloomFillRatio()
{
var f = new BloomFilter(100, 0.1);
f.Add(A_BYTES);
f.Add(B_BYTES);
f.Add(C_BYTES);
var ratio = f.FillRatio();
Assert.AreEqual(0.025, ratio);
}
public void is_not_in_filter_int(int value)
{
var filter = new BloomFilter <int>(10, HashFunctions.HashInt);
filter.Add(1);
filter.Add(100);
filter.Add(2);
filter.Add(200);
filter.Add(3);
Assert.False(filter.Contains(value));
}
public void is_not_in_filter_string(string value)
{
var filter = new BloomFilter <string>(10, HashFunctions.HashString);
filter.Add("bananas");
filter.Add("watermelons");
filter.Add("cantaloupes");
filter.Add("grapes");
filter.Add("grapefruits");
Assert.False(filter.Contains(value));
}
public void ContainsTest()
{
BloomFilter <string> bf = new BloomFilter <string>(20, 3);
bf.Add("testing");
bf.Add("nottesting");
bf.Add("testingagain");
Assert.False(bf.Contains("badstring"));
Assert.True(bf.Contains("testing"));
Assert.True(bf.Contains("nottesting"));
Assert.True(bf.Contains("testingagain"));
}
public void TestAdd()
{
var filter = new BloomFilter(32);
var slot1 = filter.Hash1(lines[0]);
var slot2 = filter.Hash2(lines[0]);
filter.Add(lines[0]);
filter.Add(null);
Assert.IsTrue(filter.IsValue(lines[0]));
Assert.IsTrue(filter.bitArray[slot1]);
Assert.IsTrue(filter.bitArray[slot2]);
Assert.IsTrue(filter.IsValue(null));
Assert.IsTrue(filter.bitArray[0]);
}
public void BasicTest()
{
var filter = new BloomFilter<string>(10000);
filter.Add("foo");
filter.Add("bar");
Assert.IsTrue(filter.Contains("foo"));
Assert.IsTrue(filter.Contains("bar"));
Assert.IsFalse(filter.Contains("baz"));
filter.Add("baz");
Assert.IsTrue(filter.Contains("baz"));
}
public void SettingInit()//进行Settings.SeedsAddress Settings.HrefKeywords urlFilterKeyWord 基础设定
{
//webClient.DownloadFileCompleted += WebClient_DownloadFileCompleted;
//种子地址需要加布隆过滤
//Settings.Depth = 4;
//代理ip模式
Settings.IPProxyList = new List <IPProxy>();
Settings.IgnoreSucceedUrlToDB = true;//不添加地址到数据库
Settings.MaxReTryTimes = 20;
Settings.ThreadCount = 10;
Settings.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8";
Settings.ContentType = "application/x-www-form-urlencoded";
Settings.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36";
Settings.HeadSetDic = new Dictionary <string, string>();
Settings.HeadSetDic.Add("Accept-Encoding", "gzip, deflate");
Settings.SimulateCookies = "UM_distinctid=163c909dac3a0b-0a58055a844938-737356c-13c680-163c909dac46fa; JSESSIONID=0000uekkAKP_Q0hcDP33LrLYCY5:-1; CNZZDATA4237675=cnzz_eid%3D1374545162-1528085523-null%26ntime%3D1528091007";
Settings.Referer = "http://www.jyfcc.com.cn/PreSellCert_Detail.do?pscid=101074";
Console.WriteLine("正在获取已存在的url数据");
//布隆url初始化,防止重复读取url
Console.WriteLine("正在初始化选择url队列");
projectList = dataop.FindAllByQuery(DataTableName, Query.NE("isUpdate", 1)).ToList();
//iCPH
foreach (var proj in projectList)
{
var mhUrl = string.Format("http://www.jyfcc.com.cn/ifrm_House_List.do?pscid={0}", proj.Text("projId"));
if (!filter.Contains(mhUrl))//具体页面
{
filter.Add(mhUrl);
UrlQueue.Instance.EnQueue(new UrlInfo(mhUrl)
{
Depth = 1, UniqueKey = proj.Text("projId")
});
}
}
// UrlQueue.Instance.EnQueue(new UrlInfo("http://www.hhcool.com/cool286073/1.html?s=11&d=0"+"&checkPageCount=1") { Depth = 1 });
//Settings.SeedsAddress.Add(string.Format("http://fdc.fang.com/data/land/CitySelect.aspx"));
Settings.RegularFilterExpressions.Add("XXX");//不添加其他
if (SimulateLogin())
{
// Console.WriteLine("zluckymn模拟登陆成功");
}
else
{
Console.WriteLine("初始化失败");
}
}
public void always_return_true_if_an_item_was_added_for_large_n()
{
int n = 1234567;
double p = 1.0e-6;
BloomFilter filter = new BloomFilter(n, p);
//no items added yet
for (int i = 0; i <= n; i++)
{
Assert.IsFalse(filter.MayExist(i));
}
//add the items
for (int i = 0; i <= n; i++)
{
filter.Add(i);
}
//all the items should exist
for (int i = 0; i <= n; i++)
{
Assert.IsTrue(filter.MayExist(i));
}
}
public void Random()
{
Random random = new Random();
for (int i = 0; i < 5000; i++)
{
BloomFilter <int> bf = new BloomFilter <int>();
List <int> values = new List <int>();
for (int j = 0; j < 50; j++)
{
DataStructures.HashSet <int> hashSet = new DataStructures.HashSet <int>();
int rand = random.Next();
if (!hashSet.Contains(rand))
{
values.Add(rand);
hashSet.Add(rand);
bf.Add(rand);
}
}
foreach (int check in values)
{
Assert.True(bf.Contains(check));
}
}
}
public void Add1()
{
BloomFilter <int> bf = new BloomFilter <int>();
bf.Add(1);
Assert.True(bf.Contains(1));
}
public void BloomFilterRemoveItemTest()
{
var addSize = 10000;
var testData = DataGenerator.Generate().Take(addSize).ToArray();
var errorRate = 0.001F;
var size = testData.Length;
var configuration = new DefaultBloomFilterConfiguration();
var bloomFilter = new BloomFilter <TestEntity, long>(configuration);
bloomFilter.Initialize(2 * size, errorRate);
foreach (var itm in testData)
{
bloomFilter.Add(itm);
}
var contained = testData.Count(item => bloomFilter.Contains(item));
foreach (var item in testData.Take(addSize / 2))
{
bloomFilter.Remove(item);
}
var containedAfterRemove = testData.Count(item => bloomFilter.Contains(item));
//Bloom filter does not behave well under removal
Assert.AreEqual(containedAfterRemove, 4137, "Wrong item count after removal.");
}
public void Probability_of_false_positive_is_accurate_when_filter_is_at_capacity()
{
var attempts = 3;
// this test occasionally fails due to the odd outlier, since it's probabilistic, so we retry it a few times
while (attempts-- > 0)
{
var filter = new BloomFilter(1000, .01);
var stringsInFilter = Enumerable.Range(1, 1000).Select(_ => Guid.NewGuid().ToString());
foreach (var s in stringsInFilter)
{
filter.Add(s);
}
var falsePositives = Enumerable.Range(1001, 10000)
.Select(i => i.ToString())
.Where(s => filter.MayContain(s))
.ToList();
Console.WriteLine(falsePositives.Count + " false positives");
Console.WriteLine(falsePositives.ToLogString());
try
{
falsePositives.Count.Should().BeInRange(70, 120);
return;
}
catch (Exception) when (attempts == 0)
{
throw;
}
}
}
private static void VerifyFalsePositiveRate(int numberOfItems, double targetFalsePositiveRate, int randomSeed)
{
const int NumberOfIntentionallyAbsentItems = 10000;
const double AllowedErrorMagnitude = 0.2;
var filter = new BloomFilter(BloomFilter.Parameters.CreateOptimalWithFalsePositiveProbability(numberOfItems, targetFalsePositiveRate));
Item[] allItems = GenerateUniqueRandomItems(new Random(randomSeed), numberOfItems + NumberOfIntentionallyAbsentItems);
for (int i = 0; i < numberOfItems; i++)
{
filter.Add(allItems[i].GetHash());
}
int numberOfFalsePositives = 0;
for (int i = numberOfItems; i < allItems.Length; i++)
{
if (filter.PossiblyContains(allItems[i].GetHash()))
{
numberOfFalsePositives++;
}
}
double expectedFalsePositives = targetFalsePositiveRate * NumberOfIntentionallyAbsentItems;
double error = (expectedFalsePositives - numberOfFalsePositives) / expectedFalsePositives;
XAssert.IsTrue(
Math.Abs(error) <= AllowedErrorMagnitude,
"The false-positive rate was signficantly different than theoretical. This should be unlikely. Actual: {0} Expected: {1} Error ratio: {2} (allowed {3})",
numberOfFalsePositives,
expectedFalsePositives,
error,
AllowedErrorMagnitude);
}
public void support_adding_large_values()
{
int n = 1234567;
double p = 1.0e-6;
BloomFilter filter = new BloomFilter(n, p);
long[] items = { 192389123812L, 286928492L, 27582928698L, 72669175482L, 1738996371L, 939342020387L, 37253255484L, 346536436L, 123921398432L, 8324982394329432L, 183874782348723874L, long.MaxValue };
//no items added yet
for (int i = 0; i < items.Length; i++)
{
Assert.IsFalse(filter.MayExist(items[i]));
}
//add the items
for (int i = 0; i < items.Length; i++)
{
filter.Add(items[i]);
}
//all the items should exist
for (int i = 0; i < items.Length; i++)
{
Assert.IsTrue(filter.MayExist(items[i]));
}
//all the neighbouring items should probably not exist
for (int i = 0; i < items.Length; i++)
{
Assert.IsFalse(filter.MayExist(items[i] - 1));
Assert.IsFalse(filter.MayExist(items[i] + 1));
}
}
public void TestBit_1()
{
BloomFilter filter = new BloomFilter(32);
filter.Add("floor");
Assert.AreEqual(true, filter.IsValue("floor"));
}
private void OnFilterAddMessageReceived(FilterAddPayload payload)
{
if (bloom_filter != null)
{
bloom_filter.Add(payload.Data);
}
}
public void always_return_true_if_an_item_was_added()
{
for (int n = 1; n <= 1000; n++)
{
for (double p = 0.1; p > 1.0e-7; p /= 10.0)
{
BloomFilter filter = new BloomFilter(n, p);
//no items added yet
for (int i = 0; i <= n; i++)
{
Assert.IsFalse(filter.MayExist(i));
}
//add the items
for (int i = 0; i <= n; i++)
{
filter.Add(i);
}
//all the items should exist
for (int i = 0; i <= n; i++)
{
Assert.IsTrue(filter.MayExist(i));
}
}
}
}
public void For_a_value_that_was_added_Contains_returns_Maybe()
{
var filter = new BloomFilter();
var item = Guid.NewGuid().ToString();
filter.Add(item);
filter.MayContain(item).Should().BeTrue();
}
public void have_false_positives_with_probability_p_for_large_n()
{
int n = 1234567;
for (double p = 0.1; p > 1.0e-7; p /= 10.0)
{
BloomFilter filter = new BloomFilter(n, p);
//add only odd numbers
for (int i = 1; i <= n; i += 2)
{
filter.Add(i);
}
//expected number of false positives
int expectedFalsePositives = (int)Math.Ceiling(n * p / 2.0);
//none of these items should exist but there may be some false positives
int falsePositives = 0;
for (int i = 2; i <= n; i += 2)
{
if (filter.MayExist(i))
{
falsePositives++;
}
}
if (falsePositives > 0)
{
Console.Out.WriteLine("n: {0}, p:{1}. Found {2} false positives. Expected false positives: {3}", n, p, falsePositives, expectedFalsePositives);
}
Assert.LessOrEqual(falsePositives, expectedFalsePositives);
}
}
public void FalsePositivesEstimationIsCorrect()
{
const int s = 10000, n = s * 7 + 1;
var set = new HashSet<double>();
var r = new Random();
var k = (int)Math.Round(BloomFilter<double>.GetOptimalNumberOfHashFunctions(n, s));
var h = EnumerateHashFunctions(n).Take(k).ToArray();
var bloom = new BloomFilter<double>(n, h);
for (int i = 0; i < s; i++)
{
double next = 100 * r.NextDouble();
set.Add(next);
bloom.Add(next);
}
double estimated = BloomFilter<double>.GetEstimatedFalsePositiveProbability(k, n, set.Count);
int errors = 0;
const int trials = 1000000;
for (int i = 0; i < trials;)
{
double next = 100 * r.NextDouble();
if (!set.Contains(next))
{
if (bloom.Contains(next)) ++errors;
++i;
}
}
double actual = errors / (double)trials;
Assert.Equal(estimated, actual, 3);
}
public void For_a_value_that_was_not_added_Contains_returns_DefinitelyNot()
{
var filter = new BloomFilter();
filter.Add(Guid.NewGuid().ToString());
filter.MayContain(Guid.NewGuid().ToString())
.Should()
.BeFalse();
}
public void FalsePostiveRateCrossesThresholdAtCorrectCount()
{
var filter = new BloomFilter<int>(100, 0.1f);
for (int i = 0; i < 99; i++)
{
filter.Add(i);
Assert.IsTrue(filter.Contains(i));
}
Assert.IsFalse(filter.FalsePositiveRate > 0.1f);
filter.Add(1000);
filter.Add(1001);
filter.Add(1002);
Assert.IsTrue(filter.FalsePositiveRate > 0.1f);
}
public void BasicBloomFilterCorrectlyActsAsASet()
{
BloomFilter<int> filter = new BloomFilter<int>(100, 2);
//10 cannot already be in the collection, so inserting it must succeed
Assert.IsFalse(filter.Add(10));
Assert.IsTrue(filter.Add(10));
//10 is in the collection
Assert.IsTrue(filter.Contains(10));
//check a load more numbers
for (int i = 0; i < 100; i++)
{
filter.Add(i);
Assert.IsTrue(filter.Contains(i));
}
}
static void Main()
{
BloomFilter<string> bf = new BloomFilter<string>(20, 3);
bf.Add("testing");
bf.Add("nottesting");
bf.Add("testingagain");
Console.WriteLine(bf.Contains("badstring")); // False
Console.WriteLine(bf.Contains("testing")); // True
List<string> testItems = new List<string>() { "badstring", "testing", "test" };
Console.WriteLine(bf.ContainsAll(testItems)); // False
Console.WriteLine(bf.ContainsAny(testItems)); // True
// False Positive Probability: 0.040894188143892
Console.WriteLine("False Positive Probability: " + bf.FalsePositiveProbability());
}
public void ToBase64String_and_string_constructor_correctly_serialize_and_deserialize_BloomFilter_state()
{
var filter = new BloomFilter();
var item = Guid.NewGuid().ToString();
filter.Add(item);
Console.WriteLine(filter.ToString());
filter = new BloomFilter(filter.ToString());
filter.MayContain(item)
.Should()
.BeTrue();
}
public void when_Contains_is_DefinitelyNot_then_it_definitely_is_not_in_the_set()
{
var set = new HashSet<string>(Enumerable.Range(1, 100000).Select(_ => Guid.NewGuid().ToString()));
var filter = new BloomFilter(100, .7);
foreach (var s in set)
{
filter.Add(s);
}
foreach (var s in set.Where(s => !filter.MayContain(s)))
{
set.Contains(s).Should().Be(false);
}
}
public void NoFalseNegativesTest()
{
const int s = 10000, n = s * 7 + 1;
var set = new HashSet<double>();
var r = new Random();
var k = (int)Math.Round(BloomFilter<double>.GetOptimalNumberOfHashFunctions(n, s));
var h = EnumerateHashFunctions(n).Take(k).ToArray();
var bloom = new BloomFilter<double>(n, h);
for (int i = 0; i < s; i++)
{
double next = 100 * r.NextDouble();
set.Add(next);
bloom.Add(next);
}
Assert.False(set.Any(d => !bloom.Contains(d)));
}
public void BaseParalleUselTest(int testNum)
{
var bf = new BloomFilter<string>(100000000, 0.001f);
Parallel.For(0, testNum, i => bf.Add(GetTestString(i).ToString()));
var failCount = 0;
Parallel.For(0, testNum, i =>
{
if (!bf.Contains(GetTestString(i).ToString()))
{
//Trace.WriteLine($"{i}不存在");
failCount += 1;
}
});
Trace.WriteLine($"测试写入{testNum}个对象, 共有{failCount}个({(float)failCount / testNum:f6})对象不存在");
}
public void Probability_of_false_positive_is_accurate_when_filter_is_at_capacity()
{
var filter = new BloomFilter(1000, .01);
var stringsInFilter = Enumerable.Range(1, 1000).Select(_ => Guid.NewGuid().ToString());
foreach (var s in stringsInFilter)
{
filter.Add(s);
}
var falsePositives = Enumerable.Range(1001, 10000)
.Select(i => i.ToString())
.Where(s => filter.MayContain(s))
.ToList();
Console.WriteLine(falsePositives.Count() + " false positives");
Console.WriteLine(falsePositives.ToLogString());
falsePositives.Count.Should().BeInRange(70, 120);
}
public void Reindex()
{
lock (_bloomfilter)
{
var newsize = this.Count() + Configuration.DictionarySplitSize * 2;
var newbloom = new BloomFilter<string>(newsize);
foreach (var d in _primarystore)
foreach (var k in d.Keys)
newbloom.Add(k);
_bloomfilter = newbloom;
_indexpossibleincoerences = 0;
}
}
public static int Main()
{
var hashes = new IStringHash[] { new StandardHash (),
new MurmurHash2Simple (),
new SuperFastHashSimple (),
/*
new CryptographicHash (MD5.Create ()),
new CryptographicHash (SHA1.Create ()),
new CryptographicHash (RIPEMD160Managed.Create ()),
new CryptographicHash (MACTripleDES.Create ())
*/ };
var bloom = new BloomFilter (1000003, hashes);
var positive = new List<string> ();
var negative = new List<string> ();
var toggle = true;
foreach (var line in File.ReadAllLines ("/usr/share/dict/words"))
{
var l = line.Trim ();
if (toggle)
{
positive.Add (l);
bloom.Add (l);
}
else
{
negative.Add (l);
}
toggle = !toggle;
}
Console.WriteLine ("occupancy for " + positive.Count + " words: " + bloom.Occupancy ());
foreach (var line in positive)
{
if (!bloom.Lookup (line))
{
Console.WriteLine ("error!");
return 1;
}
}
int false_positives = 0;
foreach (var line in negative)
{
if (bloom.Lookup (line))
++false_positives;
}
Console.WriteLine ("false positives: " + ((float)false_positives / negative.Count));
return 0;
}
public async Task BloomFilter_can_be_round_tripped_through_JSON_serialization()
{
var filter = new BloomFilter(capacity: 10000);
filter.Add("one");
filter.Add("two");
filter.Add("three");
var json = JsonConvert.SerializeObject(filter, Formatting.Indented);
Console.WriteLine(json);
var filter2 = JsonConvert.DeserializeObject<BloomFilter>(json);
filter2.MayContain("one").Should().BeTrue();
filter2.MayContain("two").Should().BeTrue();
filter2.MayContain("three").Should().BeTrue();
filter2.MayContain("false").Should().BeFalse();
}
public void Size_comparison_vs_full_set()
{
var capacity = 100000;
var filter = new BloomFilter(capacity, .0000001);
var list = Enumerable.Range(1, capacity).Select(i => Guid.NewGuid().ToString()).ToList();
foreach (var s in list)
{
filter.Add(s);
}
File.WriteAllText(@"c:\temp\list.txt", string.Join("", list));
File.WriteAllText(@"c:\temp\filter.txt", filter.ToString());
}