public void BitIs1WhenTokenIsNumber()
{
BinarySequenceHashBuilder hash = new BinarySequenceHashBuilder();
hash.AppendOneSequence();
Assert.AreEqual(1, hash.GetBytes()[0]);
}
public void BitIs0WhenTokenIsAlpha()
{
BinarySequenceHashBuilder hash = new BinarySequenceHashBuilder();
hash.AppendZeroToSequence();
Assert.AreEqual(0, hash.GetBytes()[0]);
}
public void BitsMarkedInSequenceWhenMultipleTokensSet()
{
BinarySequenceHashBuilder hash = new BinarySequenceHashBuilder();
hash.AppendOneSequence();
hash.AppendZeroToSequence();
hash.AppendOneSequence();
hash.AppendZeroToSequence();
byte[] bytes = hash.GetBytes();
Assert.AreEqual(10 /* think binary flags */, bytes[0]);
}
public void HashesAreEqualWhenEquivalentHashesAreCompared()
{
BinarySequenceHashBuilder hash1 = new BinarySequenceHashBuilder();
for (int i = 0; i < Byte.MaxValue; i++)
{
if (i % 3 == 0)
{
hash1.AppendOneSequence();
}
else if (i % 2 == 0)
{
hash1.AppendZeroToSequence();
}
}
BinarySequenceHashBuilder hash2 = new BinarySequenceHashBuilder(hash1.GetBytes());
Assert.IsTrue(hash1 == hash2, "==");
Assert.IsTrue(hash1.Equals(hash2), ".Equals");
}
public void SanityCheckBitsMarkedWhenAllBitsUsed()
{
BinarySequenceHashBuilder hash = new BinarySequenceHashBuilder();
int lastMarkerIndex = BinarySequenceHashBuilder.SEQUENCE_BYTE_LENGTH - 2;
for (int i = 0; i < Byte.MaxValue; i++)
{
hash.AppendOneSequence();
}
byte[] bytes = hash.GetBytes();
for (int i = 0; i < lastMarkerIndex; i++)
{
if (bytes[i] != 0xFF)
{
Assert.Fail();
break;
}
}
Assert.AreEqual(127, bytes[lastMarkerIndex]);
}