public void VariableLength_FourLeadingOnes_FourBytes()
{
var expected = B("11100101") << 24 | B("11111111") << 16 | B("00001111") << 8 | B("10101010");
UdpPacketReader r = R(B("11110010"), B("11100101"), B("11111111"), B("00001111"), B("10101010"));
var actual = r.ReadVarInt64();
Assert.AreEqual(expected, actual);
}
public void VariableLength_ZeroLeadingOnes()
{
var expected = B("01001001");
UdpPacketReader r = R(expected, B("11111111"));
var actual = r.ReadVarInt64();
Assert.AreEqual(expected, actual);
}
public void VariableLength_Negative()
{
var expected = ~(B("11100101") << 24 | B("10000001") << 16 | B("00001111") << 8 | B("10101010"));
UdpPacketReader r = R(B("11111000"), B("11110010"), B("11100101"), B("10000001"), B("00001111"), B("10101010"));
var actual = r.ReadVarInt64();
Assert.AreEqual(expected, actual);
}
public void LeadingOnesInAllBytes()
{
for (int i = 0; i <= byte.MaxValue; i++)
{
var digits = Convert.ToString(i, 2);
if (digits.Length < 8)
{
digits = Enumerable.Repeat("0", 8 - digits.Length).Aggregate((a, b) => a + b) + digits;
}
var expected = digits.TakeWhile(a => a == '1').Count();
var actual = UdpPacketReader.LeadingOnes((byte)i);
Assert.AreEqual(expected, actual);
}
}