public void IsAtMost_Thrown_Exception_Has_Correct_Message()
{
try
{
Insist.IsAtMost(10, 5, ARGUMENT_NAME, MESSAGE);
}
catch (ArgumentException e)
{
Assert.IsTrue(e.Message.Contains(MESSAGE));
}
}
public void IsAtMost_Thrown_Exception_Has_Correct_Argument_Name()
{
try
{
Insist.IsAtMost(10, 5, ARGUMENT_NAME);
}
catch (ArgumentOutOfRangeException e)
{
Assert.AreEqual(ARGUMENT_NAME, e.ParamName);
}
}
/// <summary>
/// Construct a new bloom filter that tracks the specified number of
/// elements with the desired error rate.
/// </summary>
/// <param name="expectedNumberOfElements">
/// The number of items that this bloom filter is expected to track
/// </param>
/// <param name="errorRate">
/// The desired error rate for generating false positives.
/// </param>
/// <exception cref="System.ArgumentException">
/// Thrown if expectedNumberOfElements is less than 0, errorRate is less than 0 or
/// errorRate is greater than 1.
/// </exception>
public BaseBloomFilter(int expectedNumberOfElements, double errorRate)
{
#region Input validation
Insist.IsAtLeast(expectedNumberOfElements, 0, "expectedNumberOfElements");
Insist.IsAtLeast(errorRate, 0, "errorRate");
Insist.IsAtMost(errorRate, 1.0d, "errorRate");
#endregion
_expectedNumberOfElements = expectedNumberOfElements;
_errorRate = errorRate;
_hashAlgorithm = new MurmurHash2();
_numberOfBuckets = (int)Math.Ceiling(1.1d * Math.Abs((((double)_expectedNumberOfElements) * Math.Log(errorRate)) / (Math.Pow(Math.Log(2), 2))));
_numberOfHashes = (int)(Math.Ceiling(0.7d * Math.Abs((double)(_numberOfBuckets / _expectedNumberOfElements))));
_bucketStorage = GetBucketStorage(_numberOfBuckets);
_lock = new ReaderWriterLockSlim();
}
public void IsAtMost_Value_Within_Bounds_Does_Not_Throw_Exception()
{
Insist.IsAtMost(1, 5, ARGUMENT_NAME);
}
public void IsAtMost_Value_Out_Of_Bounds_Throws_Exception()
{
Insist.IsAtMost(10, 5, ARGUMENT_NAME);
}
